OCaml Changelog

Fixes

• Fix file permissions used when specifying output files of pp and ppx. (ocaml-lsp#1153)

Features

• Add "Remove type annotation" code action. (#1039)
• Support settings through didChangeConfiguration notification (#1103)
• Add "Extract local" and "Extract function" code actions. (#870)
• Depend directly on merlin-lib 4.9 (#1070)

Fixes

• Support building with OCaml 5.0 and 5.1 (#1150)

• Disable code lens by default. The support can be re-enabled by explicitly setting it in the configuration. (#1134)

• Fix initilization of ocamlformat-rpc in some edge cases when ocamlformat is initialized concurrently (#1132)

• Kill unnecessary $ dune ocaml-merlin with SIGTERM rather than SIGKILL (#1124)

• Refactor comment parsing to use odoc-parser and cmarkit instead of octavius and omd (#1088)

  This allows users who migrated to omd 2.X to install ocaml-lsp-server in the same opam switch.

  We also slightly improved markdown generation support and fixed a couple in the generation of inline heading and module types.

• Allow opening documents that were already open. This is a workaround for neovim's lsp client (#1067)

• Disable type annotation for functions (#1054)

• Respect codeActionLiteralSupport capability (#1046)

• Fix a document syncing issue when utf-16 is the position encoding (#1004)

• Disable "Type-annotate" action for code that is already annotated. (#1037, fixes #1036)

• Fix semantic highlighting of long identifiers when using preprocessors (#1049, fixes #1034)

• Fix the type of DocumentSelector in cram document registration (#1068)

• Accept the --clientProcessId command line argument. (#1074)

• Accept --port as a synonym for --socket. (#1075)

• Fix connecting to dune rpc on Windows. (#1080)

• Adopt the OCaml Code of Conduct on the repo (ocaml-ppx/ppxlib#426, @pitag-ha)
• Clean up misleading attribute hints when declared for proper context. (ocaml-ppx/ppxlib#425, @ceastlund)
• Ast_pattern now has ebool, pbool helper, and a new map.(ocaml-ppx/ppxlib#402, @Burnleydev1)
• Multiple errors are now reported in metaquot. (ocaml-ppx/ppxlib#397, @Burnleydev1)
• Add Attribute.declare_with_attr_loc (ocaml-ppx/ppxlib#396, @dvulakh)
• Add "ns" and "res" as reserved namespaces(ocaml-ppx/ppxlib#388, @davesnx)
• Make Quoter's let binding non-recursive (ocaml-ppx/ppxlib#401, @sim642)
• Fix failure of 'lift_map_with_context' in traverse by compile-time evaluation of 'fst' and 'snd' (ocaml-ppx/ppxlib#390, @smuenzel)
• Driver: Bias the mapping from Parsetree magic numbers to Parsetree versions towards the current version, as it is usually the common case and it helps when magic numbers are ambiguous (such as on development versions) (ocaml-ppx/ppxlib#409, @shym)
• Remove unnecessary test dependencies towards base and stdio (ocaml-ppx/ppxlib#421, @kit-ty-kate)
• Update description to reflect that ppxlib contains more than a library (Update the opam description ocaml-ppx/ppxlib#422, @pitag-ha)
• Add support for OCaml 5.1, excluding OCaml 5.1.0~alpha1 (ocaml-ppx/ppxlib#428, @shym, @Octachron , @pitag-ha, @panglesd)
• Driver: Fix -locations-check option for coercions with ground (ocaml-ppx/ppxlib#428, @Octachron)

• Switch back to threaded console for all systems; fix unresponsive console on Windows (dune#7906, @nojb)
• Respect -p / --only-packages for melange.emit artifacts (dune#7849, @anmonteiro)
• Fix scanning of Coq installed files (@ejgallego, reported by @palmskog, dune#7895 , fixes dune#7893)
• Fix RPC buffer corruption issues due to multi threading. This issue was only reproducible with large RPC payloads (dune#7418)
• Fix printing errors from excerpts whenever character offsets span multiple lines (dune#7950, fixes dune#7905, @rgrinberg)

• Fix a crash when using a version of Coq < 8.13 due to the native compiler config variable being missing. We now explicitly default to (mode vo) for these older versions of Coq. (dune#7847, fixes dune#7846, @Alizter)
• Duplicate installed Coq theories are now allowed with the first appearing in COQPATH being preferred. This is inline with Coq's loadpath semantics. This fixes an issue with install layouts based on COQPATH such as those found in nixpkgs. (dune#7790, @Alizter)
• Revert dune#7415 and dune#7450 (Resolve ppx_runtime_libraries in the target context when cross compiling) (dune#7887, fixes dune#7875, @emillon)

• [BUG] Variables are now expanded in build-env (as for setenv) [#5352 @dra27]
• Correctly handle empty environment variable additions [#5350 @dra27]
• Skip empty environment variable additions [#5350 @dra27]
• [BUG] Fix passing archive-mirrors field from init config file to config [#5315 @hannesm]
• git, hg: Use the full SHA1 revision instead of just the 8 first characters [#5342 @reynir]
• [BUG] Fix opam installing packages without checking their checksum when the local cache is corrupted in some case [#5538 @kit-ty-kate]

• merlin binary
  • Allow monadic IO in dot protocol (#1581)
  • Add a scope option to the occurrences command in preparation for the upcoming project-wide-occurrences feature (#1596)
  • Construct bool-typed holes as false instead of true in the construct command, for consistency (#1599).
  • Add a hook to configure system command for spawning ppxes when Merlin is used as a library. (#1585)
  • Implement an all-or-nothing cache for the PPX phase (#1584)
  • Cleanup functors caches when backtracking, to avoid memory leaks (#1609, fixes #1529 and ocaml-lsp#1032)
  • Fix construct results ordering for sum types sand poly variants (#1603)
  • Fix object method completion not working (#1606, fixes #1575)
  • Improve context detection for package types (#1608, fixes #1607)
  • Fix incorrect locations for string literals (#1574)
  • Fixed an issue that caused errors to erroneously alert about missing cmi files (#1577)
  • Prevent destruct from crashing on closed variant types (#1602, fixes #1601)
  • Improve longident parsing (#1612, fixes #945)
• editor modes
  • emacs: call the user's configured completion UI in merlin-construct (#1598)
• test suite
  • Add missing dependency to a test using ppxlib (#1583)
  • Add tests for the new PPX phase cache (#1584)
  • Add and update tests for construct ordering (#1603)

Added

• Introduce mdx stanza 0.4 requiring mdx >= 2.3.0 which updates the default list of files to include *.mld files (#7582, @Leonidas-from-XIV)

• Allow (stdlib ...) to be used with (wrapped false) in library stanzas (#7139, @anmonteiro).

• Allow the main module of a library with (stdlib ...) to depend on other libraries (#7154, @anmonteiro).

• Support (link_flags ...) in (cinaps ...) stanza. (#7423, fixes #7416, @nojb)

• Allow (package ...) in any position within (rule ...) stanza (#7445, @Leonidas-from-XIV)

• Added a new user action (concurrent ) which is like (progn ) but runs the actions concurrently. (#6933, @Alizter)

• Accept the Ordered Set Language for the modes field in library stanzas (#6611, @anmonteiro).

• Allow parallel execution of inline tests partitions (#7012, @hhugo)

• Add the --display-separate-messages flag to separate the error messages produced by commands with a blank line. (#6823, fixes #6158, @esope)

• Add --watch-exclusions to Dune build options (#7216, @jonahbeckford)

• Adds support for loading plugins in toplevels (#6082, fixes #6081, @ivg, @richardlford)

• Introduce a public_headers field on libraries. This field is like install_c_headers, but it allows to choose the extension and choose the paths for the installed headers. (#7512, @rgrinberg)

• Dune can now detect Coq theories from outside the workspace. This allows for composition with installed theories (not necessarily installed with Dune). (#7047, @Alizter, @ejgallego)

• Added a --no-build option to dune coq top for avoiding rebuilds (#7380, fixes #7355, @Alizter)

• Add a coqdoc_flags field to the coq.theory stanza allowing the user to pass extra arguments to coqdoc. (#7676, fixes #7954 @Alizter)

• Preliminary support for Coq compiled intefaces (.vos files) enabled via (mode vos) in coq.theory stanzas. This can be used in combination with dune coq top to obtain fast re-building of dependencies (with no checking of proofs) prior to stepping into a file. (#7406, @rlepigre)

• Read pkg-config arguments from the PKG_CONFIG_ARGN environment variable (#1492, #7734, @anmonteiro)

• Use $PKG_CONFIG, when set, to find the pkg-config binary (#7469, fixes #2572, @anmonteiro)

Changed

• Bootstrap: remove reliance on shell. Previously, we'd use the shell to get the number of processors. (#7274, @rgrinberg)

• Non-user proccesses such as version control or config checking are now run silently. (#6994, fixes #4066, @Alizter)

• Bytecode executables built for JSOO are linked with -noautolink and no longer depend on the shared stubs of their dependent libraries (#7156, @nojb)

• Always include opam files in the generated .install file. Previously, it would not be included whenever (generate_opam_files true) was set and the .install file wasn't yet generated. (#7547, @rgrinberg)

Deprecated

• Modules that were declared in (modules_without_implementation), (private_modules) or (virtual_modules) but not declared in (modules) will cause Dune to emit a warning which will become an error in 3.9. (#7608, fixes #7026, @Alizter)

• Coq language versions less 0.8 are deprecated, and will be removed in an upcoming Dune version. All users are required to migrate to (coq lang 0.8) which provides the right semantics for theories that have been globally installed, such as those coming from opam (@ejgallego, @Alizter)

Fixed

• Find pps dependencies in the host context when cross-compiling, (#7415, fixes #4156, @anmonteiro)

• Fix plugin loading with findlib. The functionality was broken in 3.7.0. (#7556, @anmonteiro)

• Load the host context findlib.conf when cross-compiling (#7428, fixes #1701, @rgrinberg, @anmonteiro)

• Allow overriding the ocaml binary with findlib configuration (#7648, @rgrinberg)

• Resolve ppx_runtime_libraries in the target context when cross compiling (#7450, fixes #2794, @anmonteiro)

• Fix dune install when cross compiling (#7410, fixes #6191, @anmonteiro, @rizo)

• Fix string quoting in the json file written by --trace-file (#7773, @rleshchinskiy)

• Correctly set MANPATH in dune exec. Previously, we would use the bin/ directory of the context. (#7655, @rgrinberg)

• merlin: ignore instrumentation settings for preprocessing. (#7606, fixes #7465, @Alizter)

• When a rule's action is interrupted, delete any leftover directory targets. This is consistent with how we treat file targets. (#7564, @rgrinberg)

• Fix dune crashing on MacOS in watch mode whenever $PATH contains $PWD (#7441, fixes #6907, @rgrinberg)

• Dune in watch mode no longer builds concurrent rules in serial (#7395 @rgrinberg, @jchavarri)

• dune coq top now correctly respects the project root when called from a subdirectory. However, absolute filenames passed to dune coq top are no longer supported (due to being buggy) (#7357, fixes #7344, @rlepigre and @Alizter)

• RPC: Ignore SIGPIPE when clients suddenly disconnect (#7299, #7319, fixes #6879, @rgrinberg)

• Always clean up the UI on exit. (#7271, fixes #7142 @rgrinberg)

• Bootstrap: correctly detect the number of processors by allowing nproc to be looked up in $PATH (#7272, @Alizter)

• Speed up file copying on macos by using clonefile when available (@rgrinberg, #7210)

• Support commands that output 8-bit and 24-bit colors in the terminal (#7188, @Alizter)

• Speed up rule generation for libraries and executables with many modules (#7187, @jchavarri)

• Do not re-render UI on every frame if the UI doesn't change (#7186, fix #7184, @rgrinberg)

• Make coq_db creation in scope lazy (@ejgallego, #7133)

• dune install now respects --display quiet mode (#7116, fixes #4573, fixes #7106, @Alizter)

• Stub shared libraries (dllXXX_stubs.so) in Dune-installed libraries could not be used as dependencies of libraries in the workspace (eg when compiling to bytecode and/or Javascript). This is now fixed. (#7151, @nojb)

• Fix regression where Merlin was unable to handle filenames with uppercase letters under Windows. (#7577, @nojb)

• On nix+macos, pass -f to the codesign hook to avoid errors when the binary is already signed (#7183, fixes #6265, @greedy)

• Fix bug where RPC clients built with dune-rpc-lwt would crash when closing their connection to the server (#7581, @gridbugs)

• Fix RPC server on Windows (used for OCaml-LSP). (#7666, @nojb)

• Fix regression with unit qualification when a Unit module is in scope with no () constructor (fix regression with unit qualification ocaml-community/utop#429, fixes regression with qualifying () ocaml-community/utop#428, @emillon)
• emacs: add completion-at-point implementation (Add completion-at-point implementation ocaml-community/utop#261 ocaml-community/utop#406, fixes utop emacs completion-at-point-functions support? ocaml-community/utop#261, @j-shilling)

• Add support for OCaml 5.1 (#421, @emillon)

• Mark prompt_continue, prompt_comment, smart_accept, new_prompt_hooks, at_new_prompt as deprecated (they have been documented as such since 2012 and most of them are ignored) (#415, @emillon)

• Qualify () constructor in generated expressions. (#418, fixes #417, @emillon)

Added

• Added support for mld files (#423, @jonludlam)

Changed

• Switch to using the parser that toplevel uses (found in a mutable ref, instead of always the official OCaml parser). This allows Camlp5's parser to be used with MDX. (#417, @chetmurthy)

• Fix segfault on MacOS when dune was being shutdown while in watch mode. (#7312, fixes #6151, @gridbugs, @emillon)

• Fix preludes not being recorded as dependencies in the (mdx) stanza (#7109, fixes #7077, @emillon).

• Pass correct flags when compiling stdlib.ml. (#7241, @emillon)

• Handle "Too many links" errors when using Dune cache on Windows. The fix in 3.7.0 for this same issue was not effective due to a typo. (#7472, @nojb)

Library

• The declaration of options is a regular module instead of a functor. (#2193, @EmileTrotignon)

Bug fixes

• Fix indentation when ocamlformat is disabled on an expression (#2129, @gpetiot)
• Reset max-indent when the max-indent option is not set (#2131, @hhugo, @gpetiot)
• Add missing parentheses around immediate objects having attributes attached in 4.14 (#2144, @gpetiot)
• Fix dropped comment attached to the identifier of an open-expression (#2155, @gpetiot)
• Correctly format chunks of file in presence of enable/disable floating attributes (#2156, @gpetiot)
• Remove abusive normalization in docstrings references (#2159, #2162, @EmileTrotignon)
• Fix parentheses around symbols in if-then-else branches (#2169, @gpetiot)
• Preserve position of comments around variant identifiers (#2179, @gpetiot)
• Fix parentheses around symbol identifiers (#2185, @gpetiot)
• Fix alignment inconsistency between let-binding and let-open (#2187, @gpetiot)
• Fix reporting of operational settings origin in presence of profiles (#2188, @EmileTrotignon)
• Fix alignment inconsistency of if-then-else in apply (#2203, @gpetiot)
• Fix automated Windows build (#2205, @nojb)
• Fix spacing between recursive module bindings and recursive module declarations (#2217, @gpetiot)
• ocamlformat-rpc: use binary mode for stdin/stdout (#2218, @rgrinberg)
• Fix interpretation of glob pattern in .ocamlformat-ignore under Windows (#2206, @nojb)
• Remove conf mutability, and correctly display the conventional profile when using print-config (#2233, @EmileTrotignon)
• Preserve position of comments around type alias (#2239, @EmileTrotignon)
• Preserve position of comments around constructor record (#2237, @EmileTrotignon)
• Preserve position of comments around external declaration strings (#2238, @EmileTrotignon, @gpetiot)
• Preserve position of comments around module pack expressions (#2234, @EmileTrotignon, @gpetiot)
• Correctly parenthesize array literals with attributes in argument positions (#2250, @ccasin)
• Janestreet: Fix indentation of functions passed as labelled argument (#2259, @Julow)

Changes

• Indent 2 columns after initializer keyword (#2145, @gpetiot)
• Preserve syntax of generative modules ((struct end) vs ()) (#2135, #2146, @trefis, @gpetiot)
• Preserve syntax of module unpack with type constraint (((module X) : (module Y)) vs (module X : Y)) (#2136, @trefis, @gpetiot)
• Normalize location format for warning and error messages (#2139, @gpetiot)
• Preserve syntax and improve readability of indexop-access expressions (#2150, @trefis, @gpetiot)
  • Break sequences containing indexop-access assignments
  • Remove unnecessary parentheses around indices
• Mute warnings for odoc code blocks whose syntax is not specified (#2151, @gpetiot)
• Improve formatting of odoc links (#2152, @gpetiot)
• Preserve sugared extension node attached to an if carrying attributes (#2167, @trefis, @gpetiot)
• Remove unnecessary parentheses around partially applied infix operators with attributes (#2198, @gpetiot)
• JaneStreet profile: doesn't align infix ops with open paren (#2204, @gpetiot)
• Re-use the type let_binding from the parser instead of value_binding, improve the spacing of let-bindings regarding of having extension or comments (#2219, @gpetiot)
• The ocamlformat package now only contains the binary, the library is available through the ocamlformat-lib package (#2230, @gpetiot)

New features

• Add a break-colon option to decide whether to break before or after the : symbol in value binding declarations and type constraints. This behavior is no longer ensured by ocp-indent-compat. (#2149, @gpetiot)
• Format .mld files as odoc documentation files (#2008, @gpetiot)
• New value vertical for option if-then-else (#2174, @gpetiot)
• New value vertical for option break-cases (#2176, @gpetiot)
• New value wrap-or-vertical for option break-infix that only wraps high precedence infix ops (#1865, @gpetiot)

• merlin binary
  • Update internal typer to match OCaml 4.14.1 release (#1557)
  • Improve type-enclosing behaviour when used on records' labels (#1565, fixes #1564)
  • Restore compatibility with some OCaml compiler's debug flags that were incorrectly rejected by Merlin (#1556)
  • Traverse aliases when jumping to declaration. This matches jump-to-definition's behavior (#1563)
  • Improve locate's behavior in various ill-typed expressions (#1546, fixes #1567 and partially #1543)
  • Correctly traverse patterns when looking for docs in the typedtree (#1572)
  • Get documentation when the declaration or definition is selected (#1542, fixes #1540)
  • On Windows, change to a harmless directory when launching server to avoid locking down current directory (#1569, fixes #1474)
• test suite
  • Add multiple tests for locate over ill-typed expressions (#1546)
  • Add non-regression tests for other fixes in this release

Library

• The declaration of options is a regular module instead of a functor. (#2193, @EmileTrotignon)

Bug fixes

• Fix indentation when ocamlformat is disabled on an expression (#2129, @gpetiot)
• Reset max-indent when the max-indent option is not set (#2131, @hhugo, @gpetiot)
• Add missing parentheses around immediate objects having attributes attached in 4.14 (#2144, @gpetiot)
• Fix dropped comment attached to the identifier of an open-expression (#2155, @gpetiot)
• Correctly format chunks of file in presence of enable/disable floating attributes (#2156, @gpetiot)
• Remove abusive normalization in docstrings references (#2159, #2162, @EmileTrotignon)
• Fix parentheses around symbols in if-then-else branches (#2169, @gpetiot)
• Preserve position of comments around variant identifiers (#2179, @gpetiot)
• Fix parentheses around symbol identifiers (#2185, @gpetiot)
• Fix alignment inconsistency between let-binding and let-open (#2187, @gpetiot)
• Fix reporting of operational settings origin in presence of profiles (#2188, @EmileTrotignon)
• Fix alignment inconsistency of if-then-else in apply (#2203, @gpetiot)
• Fix automated Windows build (#2205, @nojb)
• Fix spacing between recursive module bindings and recursive module declarations (#2217, @gpetiot)
• ocamlformat-rpc: use binary mode for stdin/stdout (#2218, @rgrinberg)
• Fix interpretation of glob pattern in .ocamlformat-ignore under Windows (#2206, @nojb)
• Remove conf mutability, and correctly display the conventional profile when using print-config (#2233, @EmileTrotignon)
• Preserve position of comments around type alias (#2239, @EmileTrotignon)
• Preserve position of comments around constructor record (#2237, @EmileTrotignon)
• Preserve position of comments around external declaration strings (#2238, @EmileTrotignon, @gpetiot)
• Preserve position of comments around module pack expressions (#2234, @EmileTrotignon, @gpetiot)
• Correctly parenthesize array literals with attributes in argument positions (#2250, @ccasin)

Changes

• Indent 2 columns after initializer keyword (#2145, @gpetiot)
• Preserve syntax of generative modules ((struct end) vs ()) (#2135, #2146, @trefis, @gpetiot)
• Preserve syntax of module unpack with type constraint (((module X) : (module Y)) vs (module X : Y)) (#2136, @trefis, @gpetiot)
• Normalize location format for warning and error messages (#2139, @gpetiot)
• Preserve syntax and improve readability of indexop-access expressions (#2150, @trefis, @gpetiot)
  • Break sequences containing indexop-access assignments
  • Remove unnecessary parentheses around indices
• Mute warnings for odoc code blocks whose syntax is not specified (#2151, @gpetiot)
• Improve formatting of odoc links (#2152, @gpetiot)
• Preserve sugared extension node attached to an if carrying attributes (#2167, @trefis, @gpetiot)
• Remove unnecessary parentheses around partially applied infix operators with attributes (#2198, @gpetiot)
• JaneStreet profile: doesn't align infix ops with open paren (#2204, @gpetiot)
• Re-use the type let_binding from the parser instead of value_binding, improve the spacing of let-bindings regarding of having extension or comments (#2219, @gpetiot)
• The ocamlformat package now only contains the binary, the library is available through the ocamlformat-lib package (#2230, @gpetiot)

New features

• Add a break-colon option to decide whether to break before or after the : symbol in value binding declarations and type constraints. This behavior is no longer ensured by ocp-indent-compat. (#2149, @gpetiot)
• Format .mld files as odoc documentation files (#2008, @gpetiot)
• New value vertical for option if-then-else (#2174, @gpetiot)
• New value vertical for option break-cases (#2176, @gpetiot)
• New value wrap-or-vertical for option break-infix that only wraps high precedence infix ops (#1865, @gpetiot)

dune executable

Added

• Allow running $ dune exec in watch mode (with the -w flag). In watch mode, $ dune exec the executed binary whenever it is recompiled. (#6966, @gridbugs)

• Add a dune cache size command for displaying the size of the cache (#6638, @Alizter)

• Allow $ dune ocaml dump-dot-merlin to run in watch mode. Also this command shouldn't print "Entering Directory" mesages. (#6497, @rgrinberg)

• Add native support for polling mode on Windows (#7010, @yams-yams, @nojb, review by @Rucikir and @jbeckford)

• Auto-detect dune-workspace files as dune files in Emacs (#7061, @ilankri)

• Allow $ dune utop to load libraries defined in data only directories defined using (subdir ..) (#6631, @rgrinberg)

Changed

• Make dune describe workspace return consistent dependencies for executables and for libraries. By default, compile-time dependencies towards PPX-rewriters are from now not taken into account (but runtime dependencies always are). Compile-time dependencies towards PPX-rewriters can be taken into account by providing the --with-pps flag. (#6727, fixes #6486, @esope)

• Use colored output with MDX when Dune colors are enabled. (#6462, @MisterDA)

• Use colored output with GCC and Clang when compiling C stubs. The flag -fdiagnostics-color=always is added to the :standard set of flags. (#4083, @MisterDA)

• Move $ dune ocaml-merlin -dump-config=$dir to $ dune ocaml merlin dump-config $dir. (#6547, @rgrinberg)

Fixed

• Fix parsing of OCaml errors that contain code excerpts with ... in them. (#7008, @rgrinberg)

• Fix --trace-file output. Dune now emits a single complete event for every executed process. Unterminated async events are no longer written. (#6892, @rgrinberg)

• Print missing newline after $ dune exec. (#6821, fixes #6700, @rgrinberg, @Alizter)

• Fix binary corruption when installing or promoting in parallel (#6669, fixes #6668, @edwintorok)

• Report an error if dune init ... would create a "dune" file in a location which already contains a "dune" directory (#6705, @gridbugs)

• Fix the parsing of alerts. They will now show up in diagnostics correctly. (#6678, @rginberg)

• Print "Leaving Directory" whenever "Entering Directory" is printed. (#6419, fixes #138, @cpitclaudel, @rgrinberg)

• Remove "Entering Directory" messages for $ dune install. (#6513, @rgrinberg)

• dune clean should no longer fail under Windows due to the inability to remove the .lock file. Also, bring the implementation of the global lock under Windows closer to that of Unix. (#6523, @nojb)

• Fix missing dependencies when detecting the kind of C compiler we're using (#6610, fixes #6415, @emillon)

• Remove spurious build dir created when running dune init proj ... (#6707, fixes #5429, @gridbugs)

• Validate the command line arguments for $ dune ocaml top-module. This command requires one positional argument (#6796, fixes #6793, @rgrinberg)

• Fix dependency cycle when installing files to the bin section with glob_files (#6764, fixes #6708, @gridbugs)

• Handle "Too many links" errors when using Dune cache on Windows (#6993, @nojb)

• Pre-emptively clear screen in watch mode (#6987, fixes #6884, @rgrinberg)

• Allow --sandbox to affect ocamldep invocations. Previously, they were wrongly marked as incompatible (#6749, @rgrinberg)

dune language

Added

• Allow (include_subdirs qualified) for OCaml projects. (#6594, fixes #1084, @rgrinberg)

• Format dune files when they are named dune-file. This occurs when we enable the alternative file names project option. (#6566, @rgrinberg)

• Add map_workspace_root dune-project stanza to allow disabling of mapping of workspace root to /workspace_root. (#6988, fixes #6929, @richardlford)

• Allow the cinaps stanza to set a custom alias. By default, if the alias is not set then the cinaps actions will be attached to both @cinaps and @runtest (#6991, @rgrinberg)

• Add (using ctypes 0.3). When used, paths in (ctypes) are interpreted relative to where the stanza is defined. (#6883, fixes #5325, @emillon)

Changed

• Stop passing -q flag in dune coq top, which allows for .coqrc to be loaded. (#6848, fixes #6847, @Alizter)

• Coq native mode is now automatically detected by Dune starting with Coq lang 0.7. (mode native) has been deprecated in favour of detection from the configuration of Coq. (#6409, @Alizter)

• Accurately determine merlin configuration for all sources selected with copy# and copy_files#. The old heuristic of looking for a module in parent directories is removed (#6594, @rgrinberg)

Fixed

• Fix parsing of the <= operator in blang expressions of dune files. Previously, the operator would be interpreted as <. (#6928, @tatchi)

• Fix preprocessing with staged_pps (#6748, fixes #6644, @rgrinberg)

• Fix the parsing of decimal and hexadecimal escape literals in dune, dune-package, and other dune s-expression based files (#6710, @shym)

• Fix cross compilation configuration when a context with targets is itself a host of another context (#6958, fixes #6843, @rgrinberg)

• Allow compilation rules to be impacted by (env ..) stanzas that modify the environment or set binaries. (#6527, @rgrinberg)

• Fix handling of support files generated by odoc. (#6913, @jonludlam)

• Fix the compilation of modules generated at link time when implicit_transitive_deps is enabled (#6642, @rgrinberg)

• Fix inline tests with js_of_ocaml and whole program compilation mode enabled (#6645, @hhugo)

• Fix js_of_ocaml separate compilation rules when --enable=effects ,--enable=use-js-string or --toplevel is used. (#6714, #6828, #6920, @hhugo)

• Fix js_of_ocaml separate compilation in presence of linkall (#6832, #6916, @hhugo)

• coqdep is now called once per theory, instead of one time per Coq file. This should significantly speed up some builds, as coqdep startup time is often heavy (#7048, @Alizter, @ejgallego)

• Allow users to vendor ppxlib as-is, as well as ppx_sexp_conv in the same project (#386, @kit-ty-kate)

• Remove File_path exports. (#381, @ceastlund)
• Add Ppxlib.Expansion_helpers with name mangling utilities from ppx_deriving (#370, @sim642)

• Fix configurator when using the MSVC compiler (#6538, fixes #6537, @nojb)

• Fix running the RPC server on windows (#6721 fixes #6720, @rgrinberg)

Fixed

• Undid the change to the pipe code to restore compatibility with Windows (#403, @MisterDA)

Fixes

• Fix race condition when a document was being edited and dune in watch mode was running (#1005, fixes #941, #1003)

Added

• Report all parsing errors in Markdown files (#389, @NathanReb)

Changed

• Preserve indentation in multiline OCaml blocks in .mli files (#395, @panglesd)
• Rename the Normal syntax to Markdown to better explain what the syntax is and moved it to Mdx.Syntax (#412, @Leonidas-from-XIV)

Fixed

• Fixed compatibility with Cmdliner 1.1.0 (#371, @Leonidas-from-XIV)
• Report errors and exit codes of toplevel directives (#382, @talex5, @Leonidas-from-XIV)
• Fix block locations in error reporting (#389, @NathanReb)
• Include the content of the line that features the part-end MDX directive in the output, before that line would've been dropped (#374, #387, @Leonidas-from-XIV)
• Handle EINTR signal on waitpid call by restarting the syscall. (#409, @tmcgilchrist)
• Fix parsing of multiline toplevel phrases in .mli files (#394, #397, @Leonidas-from-XIV)

Removed

• Removed warning about missing semicolons added in MDX 1.11.0 and the automatic insertion of semicolons in the corrected files introduced in MDX 2.0.0. (#398, @Leonidas-from-XIV)

Features

• Enable semantic highlighting support by default (#933)

• Support connecting over pipes and socket. Pipes on Windows aren't yet supported (#946)

  More about communication channels in LSP specification.

• Re-enable ocamlformat-rpc for formatting code snippets (but not files and not on Windows) (#920, #939)

  One needs to have installed either ocamlformat package version > 0.21.0 or, otherwise, ocamlformat-rpc package. Note that previously ocamlformat-rpc came in a standalone OPAM package, but since ocamlformat version > 0.21.0, it comes within ocamlformat package.

• Add custom ocamllsp/hoverExtended request (#561)

• Support utf-8 position encoding clients (#919)

  More about position encoding in LSP specification.

• Show unwrapped module alias types on hovering over module names. This is due to upgrading to merlin 4.7 and using merlin's verbosity=smart by default (#942)

Fixes

• Respect the client's completion item resolve and preSelect capabilities (#925, #936)

• Disable polling for dune's watch mode on Windows and OCaml 4.14.0 (#935)

• Fix semantic highlighting of "long identifiers," e.g., Foo.Bar.x (#932)

• Fix syncing of document contents:

  • For ranges that span an entire line (#927)
  • Previously, whole line edits would incorrectly eat the newline characters (#971)

• Bump the compatibility to 4.08+ (#393 @emillon)
• Load @toplevel_printer annotated printers for functors (#378 @metavinek)
• Do not display a backtrace when exiting normally (#399 #398 @emillon)

Changes in OCaml 4.14.1 (20 December 2022)

Compiler User-Interface and Warnings:

• #11184, #11670: Stop calling ranlib on created / installed libraries (Sébastien Hinderer and Xavier Leroy, review by the same)

Build System:

• #11370, #11373: Don't pass CFLAGS to flexlink during configure. (David Allsopp, report by William Hu, review by Xavier Leroy and Sébastien Hinderer)

• #11487: Thwart FMA test optimisation during configure (William Hu, review by David Allsopp and Sébastien Hinderer)

Bug Fixes:

• #10768, #11340: Fix typechecking regression when combining first class modules and GADTs. (Jacques Garrigue, report by François Thiré, review by Matthew Ryan)

• #11204: Fix regression introduced in 4.14.0 that would trigger Warning 17 when calling virtual methods introduced by constraining the self type from within the class definition. (Nicolás Ojeda Bär, review by Leo White)

• #11263, #11267: caml/{memory,misc}.h: Check whether _MSC_VER is defined before using it to ensure that the headers can always be used in code which turns on -Wundef (or equivalent). (David Allsopp and Nicolás Ojeda Bär, review by Nicolás Ojeda Bär and Sébastien Hinderer)

• #11314, #11416: Fix non-informative error message for module inclusion (Florian Angeletti, report by Thierry Martinez, review by Gabriel Scherer)

• #11358, #11379: Refactor the initialisation of bytecode threading, This avoids a "dangling pointer" warning of GCC 12.1. (Xavier Leroy, report by Armaël Guéneau, review by Gabriel Scherer)

• #11387: Module type with constraints no longer crash the compiler in presence of both shadowing warnings and the -bin-annot compiler flag. (Florian Angeletti, report by Christophe Raffalli, review by Gabriel Scherer)

• #11392, #11392: Assertion failure with -rectypes and external definitions (Gabriel Scherer, review by Florian Angeletti, report by Dmitrii Kosarev)

• #11417: Fix a regression which allowed virtual methods in non-virtual classes. (Leo White, review by Florian Angeletti)

• #11468: Fix regression from #10186 (OCaml 4.13) detecting IPv6 on Windows for Mingw-w64 i686 port. (David Allsopp, review by Xavier Leroy and Sébastien Hinderer)

• #11489, #11496: More prudent deallocation of alternate signal stack (Xavier Leroy, report by @rajdakin, review by Florian Angeletti)

• #11516, #11524: Fix the deprecated_mutable attribute. (Chris Casinghino, review by Nicolás Ojeda Bär and Florian Angeletti)

• #11194, #11609: Fix inconsistent type variable names in "unbound type var" messages (Ulysse Gérard and Florian Angeletti, review Florian Angeletti and Gabriel Scherer)

• #11622: Prevent stack overflow when printing a constructor or record mismatch error involving recursive types. (Florian Angeletti, review by Gabriel Scherer)

• #11732: Ensure that types from packed modules are always generalised (Stephen Dolan and Leo White, review by Jacques Garrigue)

• #11737: Fix segfault condition in Unix.stat under Windows in the presence of multiple threads. (Marc Lasson, Nicolás Ojeda Bär, review by Gabriel Scherer and David Allsopp)

• #11776: Extend environment with functor parameters in strengthen_lazy. (Chris Casinghino and Luke Maurer, review by Gabriel Scherer)

• #11533, #11534: Follow synonyms again in #show_module_type (this had stopped working in 4.14.0) (Gabriel Scherer, review by Jacques Garrigue, report by Yaron Minsky)

• #11768, #11788: Fix crash at start-up of bytecode programs in no-naked-pointers mode caused by wrong initialisation of caml_global_data (Xavier Leroy, report by Etienne Millon, review by Gabriel Scherer)

• #11803, #11808: On x86, the destination of an integer comparison must be a register; it cannot be a stack slot. (Vincent Laviron, review by Xavier Leroy, report by Emilio Jesús Gallego Arias)

OCaml 5.0.0 (16 December 2022)

• #10831: Multicore OCaml (Enguerrand Decorne, Stephen Dolan, Tom Kelly, Sadiq Jaffer, Anil Madhavapeddy, Sudha Parimala, KC Sivaramakrishnan, Leo White, the Tarides multicore team, review by Florian Angeletti, Damien Doligez, Xavier Leroy, Guillaume Munch-Maccagnoni, Olivier Nicole, Nicolás Ojeda Bär, Gabriel Scherer, the OCaml core development team, and many other valued reviewers.)

Runtime system:

• #11400: Runtime events counters fixes Fixes mismatch between OCaml and C APIs, removes events from 4.x that are not present in the 5.0 GC and adds some missing probes. (Sadiq Jaffer, review by Gabriel Scherer, Florian Angeletti)

• #11368: Runtime events buffer size OCAMLRUNPARAMS fix The runtime events buffer size can now be set via the 'e' OCAMLRUNPARAM. This is previously mistakenly enabled/disabled tracing instead. (Sadiq Jaffer, review by KC Sivaramakrishnan, David Allsopp, Damien Doligez)

• #11308: Add environment variable to preserve runtime_events after exit If the environment variable OCAML_RUNTIME_EVENTS_PRESERVE exists then the runtime will not remove the runtime events ring buffers at exit. This makes tracing very short running programs more reliable. (Sadiq Jaffer, review by KC Sivaramakrishnan)

• #10964: Ring-buffer based runtime tracing (runtime_events) Runtime_events is a very low overhead runtime tracing system designed for continuous monitoring of OCaml applications. (Sadiq Jaffer, review by Anil Madhavapeddy, Enguerrand Decorne, Richard Warburton, Gabriel Scherer, Sabine Schmaltz, Florian Angeletti, Patrick Ferris, Tom Kelly)

• (breaking change) #10723: do not use -flat-namespace linking for macOS. (Carlo Cabrera, review by Damien Doligez)

• (breaking change) #10863, #10933: Remove support for old, unprefixed C runtime function names such as alloc. The new names prefixed with caml_ must be used instead, such as caml_alloc. Consequently, it is no longer needed to define CAML_NAME_SPACE to avoid bringing unprefixed names into scope: this is now the default behavior. (Nicolás Ojeda Bär, review by Xavier Leroy)

• #10902: Do not register empty code fragments in natdynlink. (David Allsopp, review by Xavier Leroy and Damien Doligez)

• #10965: caml_fatal_error_hook, GC timing hooks, and caml_scan_roots_hook are now atomic variables. Restore GC timing hooks in multicore. (Guillaume Munch-Maccagnoni, review by Enguerrand Decorne, Xavier Leroy, Gabriel Scherer, and KC Sivaramakrishnan)

• #11209: Add a public and thread-safe timing hook running at domain termination, after this domain has stopped running any OCaml code: caml_domain_terminated_hook. This can be useful for implementing domain-local state in C. (Guillaume Munch-Maccagnoni, review by Xavier Leroy and Gabriel Scherer)

• #10875, #11731: Add option to allocate fiber stacks and sigaltstacks with mmap(MAP_STACK) instead of malloc. This is exposed via a configure --enable-mmap-map-stack option, and is enabled by default on OpenBSD where it is mandatory. (Anil Madhavapeddy, review by Gabriel Scherer, Tom Kelly, Michael Hendricks and KC Sivaramakrishnan).

• #10950: Do not use mmap to allocate Caml_state. In order to reduce virtual memory usage, we dynamically allocate the domain_state structure. (Enguerrand Decorne, KC Sivaramakrishnan and Tom Kelly, review by Anil Madhavapeddy and Gabriel Scherer)

• #11010: Use strerror_r for reentrant error string conversion. (Anil Madhavapeddy and Xavier Leroy, review by same and Edwin Török)

• #11002, #11066, #11086: Do not use Begin_roots/End_roots macros in the runtime system. Also fix a missing root registration in the implementation of Unix.write on Windows. (Nicolás Ojeda Bär, Daniel Bünzli and Antonin Décimo, review by Xavier Leroy and David Allsopp)

• #11022: Track GC work for all managed bigarray allocations (Stephen Dolan, report by Andrew Hunter, review by Damien Doligez)

• #10802: Use 4.12 value macros and helpers in C code (Antonin Décimo, review by Gabriel Scherer)

• #11105: Fix handling of fiber stack cache with multiple domains (Jon Ludlam, KC Sivaramakrishnan and Tom Kelly)

• #11054: Respect user provided maximum stack space Make sure the stack we initially request is sized accordingly to the user provided settings. tmc/stack_space is also updated by this PR in order to account for this change. (Enguerrand Decorne, report by Jon Ludlam, review by Tom Kelly, KC Sivaramakrishnan and Gabriel Scherer)

• #11238: Increase the default limit for the stack size to 128 Mi words, i.e. 1 Gib for 64-bit platforms and 512 Mib for 32-bit platforms. (Xavier Leroy, review by Sébastien Hinderer)

• (breaking change) #11295: An ISO C 2011 compliant compiler, including full support for atomic types, is now required to build the OCaml runtime system. (Xavier Leroy, review by David Allsopp and Sébastien Hinderer)

• #10915, #11039, #11057, #11095, #11190: Implement quality treatment for asynchronous actions in multicore. Reimplement the old behaviour of caml_process_pending* for multicore. (Guillaume Munch-Maccagnoni, review by Sadiq Jaffer and Gabriel Scherer)

• #11303: Ensure that GC is not invoked from bounds check failures (Stephen Dolan, review by Sadiq Jaffer and Xavier Leroy)

• #11304: Fix data race on Windows file descriptors (Olivier Nicole and Xavier Leroy, review by Xavier Leroy, David Allsopp, and Sadiq Jaffer)

• (breaking change) #11337: pass 'flags' metadata to root scanners, to optimize stack scanning in the bytecode interpreter. Changes the interface of user-provided root-scanning hooks. (Gabriel Scherer, review by Xavier Leroy, Guillaume Munch-Maccagnoni, Sadiq Jaffer and Tom Kelly)

• #11144: Restore frame-pointers support for amd64 (Fabrice Buoro, review by Frederic Bour and KC Sivaramakrishnan)

• (breaking change) #11255: in the C interface, &Field(v, i) now has type volatile value * instead of value * in OCaml 4. This makes the memory model for mixed OCaml/C code better defined, but can cause warnings or type errors in user C code. (KC Sivaramakrishnan, review by Xavier Leroy, Gabriel Scherer and Guillaume Munch-Maccagnoni, additional discussions with Stephen Dolan and Luc Maranget)

• #5299, #4787, #11138, #11272, #11506: To help debugging, Caml_state now dynamically checks that the domain lock is held, and fails otherwise (with a fatal error at most entry points of the C API, or systematically in debug mode). A new variable Caml_state_opt is introduced, and is NULL when the domain lock is not held. This allows to test from C code if the current thread holds the lock of its domain. (Guillaume Munch-Maccagnoni, review by Florian Angeletti, Damien Doligez, Sadiq Jaffer, Xavier Leroy, and Gabriel Scherer)

• #11223: The serialization format of custom blocks changed in 4.08, but the deserializer would still support the pre-4.08 format. OCaml 5.x removed support for this old format; provide a clear error message in this case. (Hugo Heuzard, review by Gabriel Scherer)

• #11504, #11522: Use static allocation in caml_make_float_vect in no-flat-float-array mode, it's more efficient and avoids a a race condition (Xavier Leroy, report by Guillaume Munch-Maccagnoni, review by David Allsopp)

• #11652: Fix benign off-by-one error in Windows implementation of caml_mem_map. (David Allsopp, review by Gabriel Scherer)

• #11669, #11704: Fix construction of Effect.Unhandled exceptions in the bytecode interpreter. (David Allsopp and Xavier Leroy, report by Samuel Hym, review by Xavier Leroy and Gabriel Scherer)

Code generation and optimizations:

• #10972: ARM64 multicore support: OCaml & C stack separation; dynamic stack size checks; fiber and effects support. (Tom Kelly and Xavier Leroy, review by KC Sivaramakrishnan, Xavier Leroy Guillaume Munch-Maccagnoni, Eduardo Rafael, Stephen Dolan and Gabriel Scherer)

• (breaking change) #10845 Emit frametable size on amd64 BSD (OpenBSD, FreeBSD, NetBSD) systems (emitted for Linux in #8805) (Hannes Mehnert, review by Nicolás Ojeda Bär)

Standard library:

• #10742: Use LXM as the pseudo-random number generator for module Random. Add Random.State.split and Random.split to "split" a PRNG off another PRNG. (Xavier Leroy, review by Gabriel Scherer and Hugo Heuzard)

• (breaking change) #10867, #11345: Remove deprecated values: Array.create, Array.make_float, Array.create_matrix, Bytes.uppercase, Bytes.lowercase, Bytes.capitalize, Bytes.uncapitalize, Char.lowercase, Char.uppercase, Filename.temp_dir_name, Int32.format, Int64.format, Nativeint.format, Format.bprintf, Format.kprintf, Format.set_all_formatter_output_functions, Format.get_all_formatter_output_functions, Format.pp_set_all_formatter_output_functions, Format.pp_get_all_formatter_output_functions, Format.pp_open_tag, Format.pp_close_tag, Format.open_tag, Format.close_tag, Format.formatter_tag_functions, Format.pp_set_formatter_tag_functions, Format.pp_get_formatter_tag_functions, Format.set_formatter_tag_functions, Format.get_formatter_tag_functions, Gc (mutability of the fields of type Gc.control), Lazy.lazy_from_fun, Lazy.lazy_from_val, Lazy.lazy_is_val, Obj.set_tag, Obj.truncate, Obj.final_tag, Obj.extension_constructor, Obj.extension_name, Obj.extension_id, Scanf.stdib, Scanf.fscanf, Scanf.kfscanf, Stdlib.( & ), Stdlib.( or ), String.set, String.copy, String.fill, String.unsafe_set, String.unsafe_fill, String.uppercase, String.lowercase, String.capitalize, String.uncapitalize, Thread.kill, Thread.wait_write, Thread.wait_read, the whole ThreadUnix module, the infix operator (.[]<-). (Nicolás Ojeda Bär, review by Damien Doligez)

• (breaking change) #10896: Remove Stream, Genlex and Pervasives. Also remove legacy standalone bigarray library (the Bigarray module is now part of the standard library). (Nicolás Ojeda Bär, review by Kate Deplaix and Anil Madhavapeddy)

• #10921: Use getentropy, when available, to seed the generator during Random.self_init (Michael Hendricks, review by Gabriel Scherer, Xavier Leroy, and Anil Madhavapeddy)

• (breaking change) #10924: Add deprecated attribute to Printexc.catch, Printf.kprintf and Unix.SO_ERROR. (Nicolás Ojeda Bär, review by Damien Doligez)

• #10986: Add Scanf.sscanf_opt, Scanf.bscanf_opt and Scanf.scanf_opt. (Nicolás Ojeda Bär, review by Florian Angeletti and Gabriel Scherer)

• (breaking change) #11157: Rename "hash" in the "Hashtbl.SeededHashedType" signature to "seeded_hash". This allows defining both seeded and unseeded hash functions in the same module. (Nicolás Ojeda Bär, review by Gabriel Scherer and Xavier Leroy)

• #8878: Add String.hash and String.seeded_hash. (Tom Kelly, review by Alain Frisch and Nicolás Ojeda Bär)

Other libraries:

• (breaking change) #9071, #9100, #10935: Reimplement Thread.exit() as raising the exception Thread.Exit, and mark Thread.exit as deprecated. The new implementation changes the behavior compared with the OCaml 4 implementation. For example, the new implementation causes Fun.finally finalizers to be run and catch-all exception handlers to prevent termination. (Jacques-Henri Jourdan and Xavier Leroy, review by Damien Doligez, Guillaume Munch-Maccagnoni, Gabriel Scherer, and Enguerrand Decorne)

• #11034: Dynlink library, add a global lock to make dynlinking thread-safe. (Florian Angeletti, review by Gabriel Scherer)

• #11087: deprecate Thread.wait_timed_read, Thread.wait_timed_write, Thread.select, Thread.wait_pid. The same functionality is available in the Unix module. (Nicolás Ojeda Bär, review by Anil Madhavapeddy)

• #11309, #11424, #11427, #11545: Add Domain.recommended_domain_count. (Christiano Haesbaert, Konstantin Belousov, review by David Allsopp, KC Sivaramakrishnan, Gabriel Scherer, Nicolas Ojeda Bar)

• #11461, #11466: Fix gethostbyaddr for IPv6 arguments and make it domain-safe (Olivier Nicole, Nicolás Ojeda Bär, David Allsopp and Xavier Leroy, review by the same)

• #11479: Make Unix.symlink domain-safe on Windows (Olivier Nicole, review by Xavier Leroy and David Allsopp)

Tools:

• (breaking change) #11004: Litmus tests for checking the implementation of the memory model. (Luc Maranget, review by Gabriel Scherer and Xavier Leroy)

• #11024: Handle alerts in ocamldoc. The alert [@@alert deprecated] is handled specifically and it's no longer needed to duplicate the deprecated annotation (the alert for the compiler and the tag for the documentation). Every other alerts also appear in the documentation. (Jules Aguillon, review by Florian Angeletti)

• #11065: Port the bytecode debugger to 5.0, adding support for effect handlers. (Damien Doligez and @fabbing, review by @fabbing and Xavier Leroy)

• #11079: Add the -nobanners option to dumpobj. (Sébastien Hinderer, review by Gabriel Scherer and Vincent Laviron)

• #11100: Fix ocamltest to make sure failed tests are not counted as "unexpected error". (Damien Doligez, review by Sébastien Hinderer)

• #11245: Merge the common code of ocamlcp and ocamloptp into a single module. (David Allsopp, review by Sébastien Hinderer)

• #11382: OCamlmktop use a new initialization module "OCamlmktop_init" to preserve backward-compatibility with user-module provided modules that install toplevel printers. (Florian Angeletti, review by Gabriel Scherer and David Allsopp)

Manual and documentation:

• #11058: runtime/HACKING.adoc tips on debugging the runtime (Gabriel Scherer, review by Enguerrand Decorne and Nicolás Ojeda Bär)

• #11093: Add an effect handlers tutorial (KC Sivaramakrishnan, review by François Pottier, Gabriel Scherer, François Bobot and Wiktor Kuchta)

• #11192: Better documentation for condition variables. (François Pottier, review by Luc Maranget, Xavier Leroy, and Wiktor Kuchta)

• #11093: Add tutorials on parallelism features and the relaxed memory model (KC Sivaramakrishnan, review by Damien Doligez, Anil Madhavapeddy, Gabriel Scherer, Thomas Leonard, Tom Ridge, Xavier Leroy, Luc Maranget, Fabrice Buoro, Olivier Nicole, Guillaume Munch-Maccagnoni, Jacques-Henri Jourdan)

• #11640: Add Flambda commonly-used options to the ocamlopt manpage (Amandine Nangah, review by David Allsopp, Florian Angeletti, Sébastien Hinderer, and Vincent Laviron)

• #11676: Fix missing since annotation in the Sys and Format modules (Github user Bukolab99, review by Florian Angeletti)

• #11813: Make new multicore chapters easier to discover, and emphasize impact on C bindings. (Edwin Török, review by KC Sivaramakrishnan, and Florian Angeletti)

Compiler user-interface and warnings:

• #9140, #11131: New command-line flag -nocwd to not include implicit the current directory to the load path. (Thomas Roglin, review by Gabriel Scherer and Nicolás Ojeda Bär)

• #11089: Add 'since ' information to compiler warnings. (André Maroneze, review by Florian Angeletti and Gabriel Scherer)

• #10909: Disable warning 59 (assignment to immutable blocks) unless flambda invariant checks are enabled. (Vincent Laviron, review by Gabriel Scherer)

• #10981, #11276: Implement a -cmi-file option for ocamlc and ocamlopt. (Sébastien Hinderer, review by Damien Doligez, Daniel Bünzli and Florian Angeletti)

• (breaking change) #11049: Stop padding 1-digit compiler minor version numbers. (So for instance OCaml 5.0 rather than 5.00) (Sébastien Hinderer, review by David Allsopp, Florian Angeletti and Xavier Leroy)

• #11184, #11670: Stop calling ranlib on created / installed libraries (Sébastien Hinderer and Xavier Leroy, review by the same)

• #11253: Deprecate ocaml script and ocamlnat script where script has no extension and is an implicit basename. (David Allsopp, review by Florian Angeletti and Sébastien Hinderer)

Internal/compiler-libs changes:

• #10878, #10909: restore flambda after the Multicore merge. (Vincent Laviron, review by Gabriel Scherer and Xavier Leroy)

• #10864, #10888: restore afl-fuzz mode for sequential programs. (Jan Midtgaard, review by Xavier Leroy and Gabriel Scherer)

• #11008, #11047: rework GC statistics in the Multicore runtime (Gabriel Scherer, review by Enguerrand Decorne)

• #11058: basic debugging documentation in runtime/HACKING.adoc (Gabriel Scherer, review by Enguerrand Decorne and Nicolás Ojeda Bär)

• #11199: Stop installing topdirs.cmi twice. The toplevel now reads topdirs.cmi from +compiler-libs, as the debugger does. (David Allsopp, review by Sébastien Hinderer)

• #11007, #11399: META files for the stdlib, compiler-libs and other libraries (unix, dynlink, str, runtime_events, threads, ocamldoc) are now installed along with the compiler. (David Allsopp, Florian Angeletti, Nicolás Ojeda Bär and Sébastien Hinderer, review by Daniel Bünzli, Kate Deplaix, Anil Madhavapeddy and Gabriel Scherer)

Build system:

• (breaking change) #10893: Remove configuration options --disable-force-safe-string and DEFAULT_STRING=unsafe as well as --enable-force-safe-string and DEFAULT_STRING=safe which are now the default unconditionally. (Kate Deplaix, review by Gabriel Scherer and David Allsopp)

• #11092: Build native-code compilers on OpenBSD/aarch64. (Christopher Zimmermann, review by Anil Madhavapeddy)

• #11126: Build system: make it possible to choose which ocamldep (and flags) to use when computing dependencies for the compiler. Add a -no-slash option to ocamldep to let users override -slash. (Sébastien Hinderer, review by David Allsopp)

• #11147: Factorize the stdlib-related compilation flags. Make it possible to control them consistently through the STDLIBFLAGS build variable. Make sure ocamldoc and ocamllex get compiled and linked with debugging information (-g). (Sébastien Hinderer, review by Gabriel Scherer)

• #11149: Make the bootstrap process reproducible on systems with non-big-endian floating point. If the boot/ artefacts are up-to-date, this means that running make bootstrap on any platform should not change the images in boot/ and paves the way for automated testing that the bootstrap is repeatable. (David Allsopp, review by Damien Doligez and Sébastien Hinderer)

• #11160: otherlibs: merge win32unix into unix. (Sébastien Hinderer, review by David Allsopp, Nicolás Ojeda Bär, Xavier Leroy, Vincent Laviron and Antonin Décimo)

• (breaking change) #11198, #11298: Install the Dynlink, Str and Unix libraries to individual subdirectories of LIBDIR. The compiler, debugger and toplevel automatically add -I +lib if required, but display an alert. (David Allsopp, review by Florian Angeletti, Nicolás Ojeda Bär, Valentin Gatien-Baron and Sébastien Hinderer)

• #11200: Install ocamlprof's Profiling runtime module to a +profiling, removing it from the default namespace. (David Allsopp, review by Sébastien Hinderer)

• #11294: Switch minimum required autoconf to 2.71. (David Allsopp, review by Xavier Leroy)

• #11370, #11373: Don't pass CFLAGS to flexlink during configure. (David Allsopp, report by William Hu, review by Xavier Leroy and Sébastien Hinderer)

• #11487: Thwart FMA test optimization during configure (William Hu, review by David Allsopp and Sébastien Hinderer)

• #11097: Build native-code compilers on NetBSD/aarch64 (Kate Deplaix, review by Anil Madhavapeddy)

Bug fixes:

• #10768, #11340: Fix typechecking regression when combining first class modules and GADTs. (Jacques Garrigue, report by François Thiré, review by Matthew Ryan)

• #10790: don't drop variance and injectivity annotations when pretty printing with constraints (for example, with type +!'a t = ...). (Florian Angeletti, report by Luke Maurer, review by Matthew Ryan and Gabriel Scherer)

• #11167: Fix memory leak from signal stack. (Antoni Żewierżejew, review by Gabriel Scherer and Enguerrand Decorne)

• #11112: harden -use-runtime against spaces or quotes in the provided path (Gabriel Scherer, report by Brahima Dibassi, review by David Allsopp)

• #11068, #11070: Fix typo in function name given in Unix_error exception for Unix.readlink on Windows. (David Allsopp, report by Xia Li-yao)

• #10807: Don't duplicate standard handles in the child process spawned by win32unix Unix.create_process if the handles were already inheritable. Fix broken signalling of EOF on standard handles if they were already inheritable. (Antonin Décimo, review by Xavier Leroy and Nicolás Ojeda Bär)

• #10868: Fix off-by-1 bug when initializing frame hashtables (Jonah Beckford, review by Tom Kelly, Nicolás Ojeda Bär and KC Sivaramakrishnan)

• #11077: Make dumpobj compatible with absence of naked pointer support (Olivier Nicole and Jan Midtgaard, review by Gabriel Scherer)

• #11111: fix fork() usage in ocamltest C code. When calling fork() from C code with the Multicore runtime active, one needs to call caml_atfork_hook() on the forked child before it can use the OCaml runtime. (Gabriel Scherer, review by Xavier Leroy, report by Brahima Dibassi)

• #10809: Use the WSA_FLAG_NO_HANDLE_INHERIT on Windows when creating sockets with WSASocket if the cloexec (non-inheritable) parameter is true. Fixes a race condition where a child process could inherit the socket and deadlock the parent. (Antonin Décimo, review by Xavier Leroy)

• #11194, #11609: Fix inconsistent type variable names in "unbound type var" messages (Ulysse Gérard and Florian Angeletti, review Florian Angeletti and Gabriel Scherer)

• #11204: Fix regression introduced in 4.14.0 that would trigger Warning 17 when calling virtual methods introduced by constraining the self type from within the class definition. (Nicolás Ojeda Bär, review by Leo White)

• #11263, #11267: caml/misc.h: check whether _MSC_VER is defined before using it to ensure that the headers can always be used in code which turns on -Wundef (or equivalent). (David Allsopp and Nicolás Ojeda Bär, review by Nicolás Ojeda Bär and Sébastien Hinderer)

• #11289, #11405: fix some leaks on systhread termination (Fabrice Buoro, Enguerrand Decorne, Gabriel Scherer, review by Xavier Leroy and Florian Angeletti, report by Romain Beauxis)

• #11314, #11416: fix non-informative error message for module inclusion (Florian Angeletti, report by Thierry Martinez, review by Gabriel Scherer)

• #11358, #11379: Refactor the initialization of bytecode threading, This avoids a "dangling pointer" warning of GCC 12.1. (Xavier Leroy, report by Armaël Guéneau, review by Gabriel Scherer)

• #11387, module type with constraints no longer crash the compiler in presence of both shadowing warnings and the -bin-annot compiler flag. (Florian Angeletti, report by Christophe Raffalli, review by Gabriel Scherer)

• #11392, #11392: assertion failure with -rectypes and external definitions (Gabriel Scherer, review by Florian Angeletti, report by Dmitrii Kosarev)

• #11417: Fix regression allowing virtual methods in non-virtual classes. (Leo White, review by Florian Angeletti)

• #11468: Fix regression from #10186 (OCaml 4.13) detecting IPv6 on Windows for mingw-w64 i686 port. (David Allsopp, review by Xavier Leroy and Sébastien Hinderer)

• #11482, #11542: Fix random crash in large closure allocation (Damien Doligez, report by Thierry Martinez and Vincent Laviron, review by Xavier Leroy)

• #11508, #11509: make Bytes.escaped domain-safe (Christiano Haesbaert and Gabriel Scherer, review by Xavier Leroy, report by Jan Midtgaard and Tom Kelly)

• #11516, #11524: Fix the deprecated_mutable attribute. (Chris Casinghino, review by Nicolás Ojeda Bär and Florian Angeletti)

• #11576: Fix bug in Bigarray.Genarray.init in the the case of zero-dimensional arrays. (Nicolás Ojeda Bär, Jeremy Yallop, report by Masayuki Takeda, review by Jeremy Yallop and Florian Angeletti)

• #11587: Prevent integer comparison from being used on pointers (Vincent Laviron, review by Gabriel Scherer)

• #11622: Prevent stack overflow when printing a constructor or record mismatch error involving recursive types. (Florian Angeletti, review by Gabriel Scherer)

• #11662, #11673: fix a memory leak when using Dynlink, the bug was only present in development version of OCaml 5. (Stephen Dolan, report by Andre Maroneze, review by Gabriel Scherer)

• #11732: Ensure that types from packed modules are always generalised (Stephen Dolan and Leo White, review by Jacques Garrigue)

• #11737: Fix segfault condition in Unix.stat under Windows in the presence of multiple threads. (Marc Lasson, Nicolás Ojeda Bär, review by Gabriel Scherer and David Allsopp)

• #11776: Extend environment with functor parameters in strengthen_lazy. (Chris Casinghino and Luke Maurer, review by Gabriel Scherer)

• #11533, #11534: follow synonyms again in #show_module_type (this had stopped working in 4.14.0) (Gabriel Scherer, review by Jacques Garrigue, report by Yaron Minsky)

• Add support for OCaml 5.0. Dose3 >= 6.1 and base64 >= 3.1.0 are now required [#5357 @kit-ty-kate @dra27 - fix #5354]
• [BUG] Fix all empty conflict explanation messages [#5378 @kit-ty-kate - partial fix #4373]

Additions

• New unstable option --as-json for the HTML renderer that emits HTML fragments (preamble, content) together with metadata (table of contents, breadcrumbs, whether katex is used) in JSON format. (@sabine, #908)
• New maths support via {m ... } and {math ... } tags. (@giltho, @gpetiot, #886)
• Various optimisations (@jonludlam, #870, #883)
• Better handling of alerts and deprecation notices. (@panglesd, #828)
• Handle language tags on code blocks (@julow, #848)

Bugfixes

• Shadowing issues (@jonludlam, #853)
• Layout fixes and improvements (@panglesd, #832, #839, #847)
• Handle comments on class constraints and inherit (@julow, #844)
• Disable the missing root warning (@jonludlam, #881)

Oops, we went looking but didn't find the changelog for this release 🙈

• merlin binary
  • Replace custom "holes" AST nodes by extensions. This restores binary compatibility and fixes issues with PPXs when using typed-holes. (#1503)
  • Do not change temporarily Merlin's cwd when starting a PPX (#1521, fixes #1420)
  • Fix a parsing issue when declaring the (??) custom prefix operator. (#1507, fixes #1506)
  • Fix variant constructors' comments grouping (#1516, @mheiber, fixes #1513)
  • Filter-out duplicates from the enclosing command result (#1512)
  • Add a new verbosity=smart mode for type enclosing that only expand modules' types (#1374, @ulugbekna)
  • Improve locate for labels' declarations in the current buffer. (#1505, fixes #1524)
  • Fix locate on module without implementation (#1522, fixes #1519)
  • Allow program name customization when merlin is used as a library. (#1532)
• editor modes
  • vim: load the plugin when necessary if it wasn't loaded before (#1511)
  • emacs: xref works from context menus; better highlighting of xref matches; xref recognises operators and binding operators at the cursor position; bad locations are filtered out (#1385, fixes #1410)
  • emacs: update CI for newer releases and fix some warnings (#1454, @mattiase)
• test suite
  • Add tests for constructors' documentation (#1511)
  • Add test cases for label comment documentation (#1526, @mheiber)
  • Add a test for the enclosing command (#1512)
  • Add tests for interactions between locate and record labels (#1505)
  • Add test showing an issue with locate and implicit transitive deps

• Fix status line enabled when ANSI colors are forced. (#6503, @MisterDA)

• Fix build with MSVC compiler (#6517, @nojb)

• Do not shadow library interface modules (#6549, fixes #6545, @rgrinberg)

dune executable

This lists features of the “dune” executable itself. Upgrading dune will bring in these changes. We consider these changes safe, but it is difficult to define what a breaking change is for a command-line tool (for example, some error messages change). It is important to note that just upgrading the dune executable is not supposed to change how dune interprets existing projects. If just upgrading dune breaks compilation, it is a bug in dune, please report it!

Added

• Introduce a $ dune ocaml top-module subcommand to load modules directly without sealing them behind the signature. (#5940, @rgrinberg)
• Revive $ dune external-lib-deps under $ dune describe external-lib-deps. (#6045, @moyodiallo)
• Extend the promotion CLI to a dune promotion group: dune promote is moved to dune promotion apply (the former still works) and the new dune promotion diff command can be used to just display the promotion without applying it. (#6160, fixes #5368, @emillon)
• Build progress status now shows number of failed jobs (#6242, @Alizter)
• Allow promoting into source directories specified by subdir (#6404, fixes #3502, @rgrinberg)
• Support CLICOLOR and CLICOLOR_FORCE to enable/disable/force ANSI colors. (#6340, fixes #6323, @MisterDA).
• Create a fake socket file _build/.rpc/dune on windows to allow rpc clients to connect using the build directory. (#6329, @rgrinberg)

Fixed

• Forbid multiple instances of dune running concurrently in the same workspace. (#6360, fixes #236, @rgrinberg)
• Make dune describe workspace return the correct root path (#6380, fixes #6379, @esope)
• Fix running inline tests in bytecode mode (#5622, fixes #5515, @dariusf)

(lang dune 3.6)

This lists changes if you opt into the new (lang dune 3.6) version in your dune-project file. For this too, these are changes that we consider safe, but they can require changes to your dune files. For example, sandboxing is enabled in more places, which means that you might have to be more precise in expressing your dependencies. Please reach out on the issue tracker if you have trouble fixing your dune file or if something does not seem to be possible anymore.

Added

• Add (glob_files <glob>) and (glob_files_rec <glob>) terms to the files field of the install stanza (#6250, closes #6018, @gridbugs)
• Allow Byte_complete binaries to be installable (#4837, @AltGr, @rgrinberg)
• Allow :standard in the (modules) field of the coq.pp stanza (#6229, fixes #2414, @Alizter)

Fixed

• Allow absolute build directories to find public executables. For example, those specified with (deps %{bin:...}) (#6326, @anmonteiro)
• [ctypes] do not mangle user written names in the ctypes stanza (#6374, fixes #5561, @rgrinberg)
• Forbid private libraries with (package ..) set from depending on private libraries that don't belong to a package (#6385, fixes #6153, @rgrinberg)
• [ctypes] always re-run pkg-config because we aren't tracking its external dependencies (#6052, @rgrinberg)
• [ctypes] remove dependency on configurator in the generated rules (#6052, @rgrinberg)
• Fix passing of flags to dune coq top (#6369, fixes #6366, @Alizter)
• Prevent crash if absolute paths are used in the install stanza and in recursive globs. These cases now result in a user error. (#6331, @gridbugs)

Fixes

• Fix random requests failing after switching documents (#904, fixes #898)

• Do not offer related diagnostic information unless the user enables in client capabilities (#905)

• Do not offer diagnostic tags unless the client supports them (#909)

• Do not attach extra data to diagnostics unless the client supports this (#910)

• Use /bin/sh instead of /bin/bash. This fixes ocamllsp on NixOS

Fixes

• Fix various server crashes when opening non OCaml/Reason files. Files such as dune, cram, etc. would cause the server to crash. (#884, fixes #871)

• Ignore unknown tags in merlin configuration to improve forward compatibility with Dune. (#883)

dune executable

This lists features of the "dune" executable itself. Upgrading dune will bring in these changes. We consider these changes safe, but it is difficult to define what a breaking change is for a command-line tool (for example, some error messages change). It is important to note that just upgrading the dune executable is not supposed to change how dune interprets existing projects. If just upgrading dune breaks compilation, it is a bug in dune, please report it!

Added

• Allow dune describe workspace to accept directories as arguments. The provided directories restrict the worskpace description to those directories. (#6107, fixes #3893, @esope)
• Add a terminal persistence mode that attempts to clear the terminal history. It is enabled by setting terminal persistence to clear-on-rebuild-and-flush-history (#6065, @rgrinberg)

Fixed

• Fix build-info version when used with flambda (#6089, fixes #6075, @jberdine)
• Fix compilation of Dune under esy on Windows (#6109, fixes #6098, @nojb)
• Improve error message when parsing several licenses in (license) (#6114, fixes #6103, @emillon)
• Handle CSI n K code in ANSI escape codes from commands. (#6214, fixes #5528, @emillon)
• Do not ignore rules marked (promote (until-clean)) when --ignore-promoted-rules (or -p) is passed. (#6010, fixes #4401, @emillon)

Changed

• dune install: copy files in an atomic way (#6150, @emillon)
• update vendored copy of cmdliner to 1.1.1. This improves the built-in documentation for command groups such as dune ocaml. (#6038, @emillon, #6169, @shonfeder)
• Extend dune describe to include the root path of the workspace and the relative path to the build directory. (#6136, @reubenrowe)

macOS support

This is technically a subset of above section. For M1 mac users, dune 3.5.0 is the first version which will correctly support dune-build-info.

Added

• on macOS, sign executables produced by artifact substitution (#6137, #6231, fixes #5650, fixes #6226, @emillon)
• Enable file watching on MacOS SDK < 10.13. (#6218, @rgrinberg)

Fixed

• macOS: Handle unknown fsevents without crashing (#6217, @rgrinberg)

(lang dune 3.5)

This lists changes if you opt into the new (lang dune 3.5) version in your dune-project file. For this too, these are changes that we consider safe, but they can require changes to your dune files. For example, sandboxing is enabled in more places, which means that you might have to be more precise in expressing your dependencies. Please reach out on the issue tracker if you have trouble fixing your dune file or if something does not seem to be possible anymore.

Added

• Add a runtime_deps field in the cinaps stanza to specify runtime dependencies for running the cinaps preprocessing action (#6175, @rgrinberg)
• Allow rules producing directory targets to be not sandboxed (#6056, @rgrinberg)
• Introduce a dirs field in the install stanza to install entire directories (#5097, fixes #5059, @rgrinberg)
• Add an (include <file>) term to the include_dirs field for adding directories to the include paths sourced from a file. (#6058, fixes #3993, @gridbugs)
• Support (extra_objects ...) field in (executable ...) and (library ...) stanzas (#6084, fixes #4129, @gridbugs)
• Allow rules producing directory targets to create symlinks (#6077, fixes #5945, @rgrinberg)
• Added an (aliases ...) field to the (rules ...) stanza which allows the specification of multiple aliases per rule (#6194, @Alizter)
• Allow include statement in install stanza (#6139, fixes #256, @gridbugs)
• Add a new experimental feature mode_specific_stubs that allows the specification of different flags and sources for foreign stubs depending on the build mode (#5649, @voodoos)

Changed

• Sandbox running cinaps actions starting from cinaps 1.1 (#6176, @rgrinberg)
• Cinaps actions are now sandboxed by default (#6062, @rgrinberg)
• Menhir rules are now sandboxed by default (#6076, @rgrinberg)
• Inline tests are now sandboxed by default (#6079, @rgrinberg)

Fixed

• Shadow alias module Foo__ when building a library Foo (#6126, @rgrinberg)
• Disallow generating targets in sub direcories in inferred rules. The check to forbid this was accidentally done only for manually specified targets (#6031, @rgrinberg)
• odoc rules now about ODOC_SYNTAX and will rerun accordingly (#6010, fixes #1117, @emillon)

Coq support

These changes, associated with (lang dune 3.5), are specific to coq.

Added

• Add %{coq:...} macro for accessing data about the configuration about Coq. For instance %{coq:version} (#6049, @Alizter)
• Starting with Coq build language 0.6, theories can be built without importing Coq's standard library by including (stdlib no). (#6165 #6164, fixes #6163, @ejgallego @Alizter @LasseBlaauwbroek)

Changed

• Dune no longer considers .aux files as targets during Coq compilation. This means that .aux files are no longer cached. (#6024, fixes #6004, @alizter)
• The test suite for Coq now requires Coq >= 8.16 due to changes in the plugin loading mechanism upstream (which now uses Findlib).
• The (coq.theory ...) stanza will now ensure that for each declared (plugin ...), the META file for it is built before calling coqdep. This enables the use of the new Findlib-based loading method in Coq 8.16; however as of Coq 8.16.0, Coq itself has some bugs preventing this to work yet. (#6167 , workarounds #5767, @ejgallego)

Features

• Code action for inlining let bindings within a module or expression. (#847)

• Tag "unused code" and "deprecated" warnings, allowing clients to better display them. (#848)

• Refresh merlin configuration after every dune build in watch mode (#853)

Fixes

• Respect showDocument capabilities. Do not offer commands or code actions that rely on this request without client support. (#836)

• Fix signatureHelp on .mll files: avoid "Document.dune" exceptions

• Make esequence right-associative. (#366, @ceastlund)
• Deprecate unused attributes in Deriving.Generator (#368, @sim642)
• Remove a pattern match on mutable state in a function argument. (#362, @ceastlund)
• Add code-path manipulation attributes. (#352, @ceastlund)
• Update context-free rules to collect expansion errors generated by ppxlib and propagate them to top level without failing. (#358 and #361, @ceastlund)
• Add driver benchmarks (#376, @gridbugs)

Fixes

• Fix cwd when executing ppx (#805)

Features

• Code actions for jumping to related files (.ml, .mli, etc.) (#795)

• Fix build on cygwin/i686-w64-mingw32 (#6008, @kit-ty-kate)

• Make dune describe correctly handle overlapping implementations for virtual libraries (#5971, fixes #5747, @esope)

• Building the @check alias should make sure the libraries and executables don't have dependency cycles (#5892, @rgrinberg)

• [ctypes] Add support for the errno parameter using the errno_policy field in the ctypes settings. (#5827, @droyo)

• Fix dune coq top when it is invoked on files from a subdirectory of the directory containing the associated stanza (#5784, fixes #5552, @ejgallego, @rlepigre, @Alizter)

• Fix hint when an invalid module name is found. (#5922, fixes #5273, @emillon)

• The (cat) action now supports several files. (#5928, fixes #5795, @emillon)

• Dune no longer uses shimmed META files for OCaml 5.x, solely using the ones installed by the compiler. (#5916, @dra27)

• Fix handling of the (deps) field in (test) stanzas when there is an .expected file. (#5952, #5951, fixes #5950, @emillon)

• Ignore insignificant filesystem events. This stops RPC in watch mode from flashing errors on insignificant file system events such as changes in the .git/ directory. (#5953, @rgrinberg)

• Fix parsing more error messages emitted by the OCaml compiler. In particular, messages where the excerpt line number started with a blank character were skipped. (#5981, @rgrinberg)

• env stanza: warn if some rules are ignored because they appear after a wildcard rule. (#5898, fixes #5886, @emillon)

• On Windows, XDG_CACHE_HOME is taken to be the FOLDERID_InternetCache if unset, and XDG_CONFIG_HOME and XDG_DATA_HOME are both taken to be FOLDERID_LocalAppData if unset. (#5943, fixes #5808, @nojb)

New features

• Support odoc-parser.2.0.0 (#2123, @gpetiot)
  • Breaking change: incompatible with earlier versions of odoc-parser
  • New inline math elements {m ...} available in doc-comments
  • New block math elements {math ...} available in doc-comments

• Allow cancellation of workspace symbols requests (#777)

• Fix unintentionally interleaved jsonrpc IO that would corrupt the session (#786)

• Ignore SIGPIPE . (#788)

Fixes

• Fix a bad interaction between inferred interfaces and promotion code actions in watch mode (#753)

• Fix URI parsing (#739 fixes #471 and #459)

Removed

• bench binary is not distributed anymore to avoid name collisions (#2104, @gpetiot)

Bug fixes

• Preserve comments around object open/close flag (#2097, @trefis, @gpetiot)
• Preserve comments around private/mutable/virtual keywords (#2098, @trefis, @gpetiot)
• Closing parentheses of local open now comply with indicate-multiline-delimiters (#2116, @gpetiot)
• emacs: fix byte-compile warnings (#2119, @syohex)

Changes

• Use the API of ocp-indent to parse the .ocp-indent files (#2103, @gpetiot)
• JaneStreet profile: set max-indent = 2 (#2099, @gpetiot)
• JaneStreet profile: align pattern-matching bar | under keyword instead of parenthesis (#2102, @gpetiot)

Oops, we went looking but didn't find the changelog for this release 🙈

• Use dependencies compatible with OCaml 5:
  • Use zed 3.2.0, based on uucp, uutf, and uuseg instead of camomile
  • Use logs.lwt instead of lwt_logs

Additions

• New subcommand to resolve references (@panglesd, @lubegasimon, #812)
• Improved rendering of long signatures (@panglesd, #782)
• Handle comments attached to open statement as floating comment, instead of dropping them (@panglesd, #797)
• Empty includes (containing entirely shadowed entries) are now hidden (@panglesd, #798)

Bugs fixed

• Fix a missing Result constructor during compile. This will cause some functor arguments to have different filenames (@jonludlam, #795)
• Better memory/disk space usage when handling module alias chains (@jonludlam, #799)
• Resolving class-type paths (ie., val x : #c) (@jonludlam, #809)
• Skip top-level attributes while extracting the top comment. Fix top-comment extraction with PPX preprocessing (@jorisgio, #819)
• Better handling of @canonical tags (@jonludlam, #820)
• css: improved layout (@jonludlam, @Julow, #822)

• merlin binary
  • make most library public and split merlin in two packages: the merlin-lib package that exposes merlin's internals and the merlin package with the frontend. (#1448, #1455, #1457, #1497, @rgrinberg, @tmattio, @kit-ty-kate)
  • Type printing: use best_module_path for paths from Mty_alias (#1470)
  • Attempt at finding the 'real' capitalization of files on windows (#1462 by @mlasson)
  • Use newer Seq-based API of Yojson 2.0, avoiding the need for the deprecated Stream module (#1475 by @Leonidas-from-XIV)
  • unify parsing of MERLIN_LOG (#1480 by @ulugbekna)
  • Fix type deduplication in type-enclosing results (#1483, fixes #1477)
  • Only weakly reduce the shapes to speed up the new Merlin locate implementation. (#1488)
  • Ignore unknown configuration tags from dune configuration provider but not from dot-merlin-reader (#1486)
  • typing recovery: recover at the granularity of core_type (#1484)
• editor modes
  • add method imenu items for emacs (#1481, @mndrix)
  • emacs: Make the prefix argument to merlin-locate optional, both for consistency with Emacs convention and for backwards compatibility. (#1476, @antalsz)
  • emacs: fix duplicated prefix path in imenu entries (#1495, @bcc32)