[Caml-list] OCaml 4.11.0, second beta release

[Caml-list] OCaml 4.11.0, second beta release

[Sébastien Hinderer]

Dear OCaml users,

The release of OCaml 4.11.0 is approaching.
As one step further in this direction, we have published a second beta
release. This new release fixes an MSVC-specific runtime issue.

The compatibility of the opam ecosystem with OCaml 4.11.0 is currently quite
good, and it should be possible to test this beta without too much trouble.

The source code is available at these addresses:

 https://github.com/ocaml/ocaml/archive/4.11.0+beta2.tar.gz
 https://caml.inria.fr/pub/distrib/ocaml-4.11/ocaml-4.11.0+beta2.tar.gz

The compiler can also be installed as an OPAM switch with one of the
following commands:

opam switch create ocaml-variants.4.11.0+beta2 --repositories=default,beta=git+https://github.com/ocaml/ocaml-beta-repository.git

or

opam switch create ocaml-variants.4.11.0+beta2+<VARIANT> --repositories=default,beta=git+https://github.com/ocaml/ocaml-beta-repository.git

 where you replace <VARIANT> with one of these:
   afl
   flambda
   fp
   fp+flambda

We would love to hear about any bugs. Please report them here:
 https://github.com/ocaml/ocaml/issues

If you are interested by the list of new features, and the on-going list
of bug fixes the
updated change log for OCaml 4.11.0 is available at:

  https://github.com/ocaml/ocaml/blob/4.11/Changes

Compared to the previous beta release, the exhaustive list of changes
is as follows:

Runtime

- #9714, #9724: Use the C++ alignas keyword when compiling in C++.
   Fixes a bug with MSVC C++ 2015/2017. Add a terminator to the
   `caml_domain_state` structure to better ensure that members are
   correctly spaced.
   (Antonin Décimo, review by David Allsopp and Xavier Leroy)

Manual and documentation

- #8644: fix formatting comment about @raise in stdlib's mli files
   (Élie Brami, review by David Allsopp)

- #9712: Update the version format to allow "~".
   The new format is "major.minor[.patchlevel][(+|~)additional-info]",
   for instance "4.12.0~beta1+flambda".
   This is a documentation-only change for the 4.11 branch, the new format
   will be used starting with the 4.12 branch.
   (Florian Angeletti, review by Damien Doligez and Xavier Leroy)

Happy hacking,

-- Florian Angeletti and Sébastien Hinderer for the OCaml team.

[Caml-list] OCaml 4.11.0, third beta release

[Florian Angeletti]

Dear OCaml users,

The release of OCaml 4.11.0 is near.
As one step further in this direction, we have published a third
and potentially last beta release.

This new release fixes an infrequent bug in the experimental best-fit 
allocator
and an issue with floating-point software emulation in the ARM EABI port.
On the opam ecosystem side, merlin is now available for this new version 
of OCaml.
The compatibility of the opam ecosystem with OCaml 4.11.0 is currently
good, and it should be possible to test this beta without too much trouble.

The source code is available at these addresses:

  https://github.com/ocaml/ocaml/archive/4.11.0+beta3.tar.gz
  https://caml.inria.fr/pub/distrib/ocaml-4.11/ocaml-4.11.0+beta3.tar.gz

The compiler can also be installed as an OPAM switch with one of the
following commands:

opam update
opam switch create ocaml-variants.4.11.0+beta3 
--repositories=default,beta=git+https://github.com/ocaml/ocaml-beta-repository.git

or

opam update
opam switch create ocaml-variants.4.11.0+beta3+<VARIANT> 
--repositories=default,beta=git+https://github.com/ocaml/ocaml-beta-repository.git

  where you replace <VARIANT> with one of these: afl, flambda, fp, 
fp+flambda

We would love to hear about any bugs. Please report them here:
  https://github.com/ocaml/ocaml/issues

Compared to the previous beta release, the exhaustive list of changes
is as follows:

Runtime:

- #9736, #9749: Compaction must start in a heap where all free blocks are
   blue, which was not the case with the best-fit allocator.
   (Damien Doligez, report and review by Leo White)

+ #9316, #9443, #9463, #9782: Use typing information from Clambda
    for mutable Cmm variables.
    (Stephen Dolan, review by Vincent Laviron, Guillaume Bury, Xavier Leroy,
    and Gabriel Scherer; temporary bug report by Richard Jones)

Manual and documentation:

- #9541: Add a documentation page for the instrumented runtime;
   additional changes to option names in the instrumented runtime.
   (Enguerrand Decorne, review by Anil Madhavapeddy, Gabriel Scherer,
    Daniel Bünzli, David Allsopp, Florian Angeletti,
    and Sébastien Hinderer)

Entries marked with "+" were already present in previous alphas, but
they have been complemented by new bug fixes.

If you are interested by the list of new features, and the nearly final list
of bug fixes the updated change log for OCaml 4.11.0 is available at:

   https://github.com/ocaml/ocaml/blob/4.11/Changes

Happy hacking,

-- Florian Angeletti for the OCaml team.

[Caml-list] OCaml 4.11.0, release candidate

[Florian Angeletti]

Dear OCaml users,

The release of OCaml version 4.11.0 is imminent. We have created a 
release candidate that you can test.
For users of the beta releases, this release candidate is exactly the 
same as the last beta release except for a minor fix for the #show 
directive in the toplevel.

The source code is available at these addresses:

  https://github.com/ocaml/ocaml/archive/4.11.0+rc2.tar.gz
  https://caml.inria.fr/pub/distrib/ocaml-4.11/ocaml-4.11.0+rc2.tar.gz

The compiler can be installed as an OPAM switch with the following commands:

$ opam update
$ opam switch create ocaml-variants.4.11.0+rc2 
--repositories=default,beta=git://github.com/ocaml/ocaml-beta-repository.git

or with

$ opam update
$ opam switch create ocaml-variants.4.11.0+rc2+<VARIANT> 
--repositories=default,beta=git+https://github.com/ocaml/ocaml-beta-repository.git

where <VARIANT> is replaced with one of these: afl, flambda, fp, fp+flambda

The opam ecosystem is in good shape for this release candidate.
For maximum compatibility, you can use the following opam-alpha-repository:

$ opam repo add alpha 
https://github.com/kit-ty-kate/opam-alpha-repository.git

during your tests. This repository integrate not-yet-upstreamed or 
unreleased fixes to various packages.
With this repository all except a handful of packages are compatible 
with this release candidate.

Using opam-alpha-repository: all core tools (see the meta issue 
https://github.com/ocaml/opam-repository/issues/16539) – including 
Merlin – work, except for ocaml-lsp-server (which is not officially 
released yet and only relevant for Windows users).

All packages except 7 over the 2134 available packages in 
opam-repository that were compatible with OCaml 4.10 are also compatible 
with OCaml 4.11.

Given that the release is very close and the state of the community 
packages stable enough, we would like to encourage people to give it a 
try before the release, especially for those on non-x86_64 architectures.

Happy hacking,
Florian Angeletti for the OCaml team

OCaml 4.11 changes
---------------------------

(Changes that can break existing programs are marked with a "*")

### Language features

- #8820, #9166: quoted extensions: {%foo|...|} is lighter syntax for
   [%foo {||}], and {%foo bar|...|bar} for [%foo {bar|...|bar}].
   (Gabriel Radanne, Leo White, Gabriel Scherer and Pieter Goetschalckx,
    request by Bikal Lem)

- #6673, #1132, #9617: Relax the handling of explicit polymorphic types
   (Leo White, review by Jacques Garrigue and Gabriel Scherer)

- #9232: allow any class type paths in #-types,
   For instance, "val f: #F(X).t -> unit" is now allowed.
   (Florian Angeletti, review by Gabriel Scherer, suggestion by Leo White)

- #7364, #2188, #9592, #9609: improvement of the unboxability check for 
types
   with a single constructor. Mutually-recursive type declarations can
   now contain unboxed types. This is based on the paper
     https://arxiv.org/abs/1811.02300
   (Gabriel Scherer and Rodolphe Lepigre,
    review by Jeremy Yallop, Damien Doligez and Frédéric Bour)

- #1154, #1706: spellchecker hints and type-directed disambiguation
   for extensible sum type constructors
   (Florian Angeletti, review by Alain Frisch, Gabriel Radanne, Gabriel 
Scherer
   and Leo White)

### Runtime system:

- #9096: Print function names in backtraces.
   (Stephen Dolan, review by Leo White and Mark Shinwell)

- #9119: Make [caml_stat_resize_noexc] compatible with the [realloc]
   API when the old block is NULL.
   (Jacques-Henri Jourdan, review by Xavier Leroy)

- #8920, #9238, #9239, #9254, #9458: New API for statistical memory 
profiling
   in Memprof.Gc. The new version does no longer use ephemerons and allows
   registering callbacks for promotion and deallocation of memory
   blocks.
   The new API no longer gives the block tags to the allocation callback.
   (Stephen Dolan and Jacques-Henri Jourdan, review by Damien Doligez
    and Gabriel Scherer)

- #9233: Restore the bytecode stack after an allocation.
   (Stephen Dolan, review by Gabriel Scherer and Jacques-Henri Jourdan)

- #9230, #9362: Memprof support for native allocations.
   (Jacques-Henri Jourdan and Stephen Dolan, review by Gabriel Scherer)

- #9249: restore definition of ARCH_ALIGN_INT64 in m.h if the architecture
   requires 64-bit integers to be double-word aligned (autoconf regression)
   (David Allsopp, review by Sébastien Hinderer)

- #9259: Made `Ephemeron.blit_key` and `Weak.blit` faster. They are now
   linear in the size of the range being copied instead of depending on the
   total sizes of the ephemerons or weak arrays involved.
   (Arseniy Alekseyev, design advice by Leo White, review by François Bobot
   and Damien Doligez)

- #9279: Memprof optimisation.
   (Stephen Dolan, review by Jacques-Henri Jourdan)

- #9280: Micro-optimise allocations on amd64 to save a register.
   (Stephen Dolan, review by Xavier Leroy)

- #9316, #9443, #9463, #9782: Use typing information from Clambda
   for mutable Cmm variables.
   (Stephen Dolan, review by Vincent Laviron, Guillaume Bury, Xavier Leroy,
   and Gabriel Scherer; temporary bug report by Richard Jones)

- #9426: build the Mingw ports with higher levels of GCC optimization
   (Xavier Leroy, review by Sébastien Hinderer)

* #9483: Remove accidental inclusion of <stdio.h> in <caml/misc.h>
   The only release with the inclusion of stdio.h has been 4.10.0
   (Christopher Zimmermann, review by Xavier Leroy and David Allsopp)

- #9353: Reimplement `output_value` and the `Marshal.to_*` functions
   using a hash table to detect sharing, instead of temporary in-place
   modifications.  This is a prerequisite for Multicore OCaml.
   (Xavier Leroy and Basile Clément, review by Gabriel Scherer and
   Stephen Dolan)

- #9282: Make Cconst_symbol have typ_int to fix no-naked-pointers mode.
   (Stephen Dolan, review by Mark Shinwell, Xavier Leroy and Vincent 
Laviron)

- #9497: Harmonise behaviour between bytecode and native code for
   recursive module initialisation in one particular case (fixes #9494).
   (Mark Shinwell, David Allsopp, Vincent Laviron, Xavier Leroy,
   Geoff Reedy, original bug report by Arlen Cox)

- #8791: use a variable-length encoding when marshalling bigarray 
dimensions,
   avoiding overflow.
   (Jeremy Yallop, Stephen Dolan, review by Xavier Leroy)

- #9082: The instrumented runtime now records logs in the CTF format.
   A new API is available in the runtime to collect runtime statistics,
   replacing the previous instrumented runtime macros.
   Gc.eventlog_pause and Gc.eventlog_resume were added to allow user to 
control
   instrumentation in a running program.
   (Enguerrand Decorne and Stephen Dolan, with help and review from
   David Allsopp, Sébastien Hinderer, review by Anil Madhavapeddy,
   Nicolás Ojeda Bär, Shakthi Kannan, KC Sivaramakrishnan, Gabriel Scherer,
   Guillaume Munch-Maccagnoni, Damien Doligez, Leo White, Daniel Bünzli
   and Xavier Leroy)

### Code generation and optimizations:

- #8637, #8805, #9247, #9296: Record debug info for each allocation.
   (Stephen Dolan and Jacques-Henri Jourdan, review by Damien Doligez,
    KC Sivaramakrishnan and Xavier Leroy)

- #9193: Make tuple matching optimisation apply to Lswitch and 
Lstringswitch.
   (Stephen Dolan, review by Thomas Refis and Gabriel Scherer)

- #9392: Visit registers at most once in Coloring.iter_preferred.
   (Stephen Dolan, review by Pierre Chambart and Xavier Leroy)

- #9441: Add RISC-V RV64G native-code backend.
   (Nicolás Ojeda Bär, review by Xavier Leroy and Gabriel Scherer)

### Standard library:

- #9077: Add Seq.cons and Seq.append
   (Sébastien Briais, review by Yawar Amin and Florian Angeletti)

- #9248: Add Printexc.default_uncaught_exception_handler
   (Raphael Sousa Santos, review by Daniel Bünzli)

- #9235: Add Array.exists2 and Array.for_all2
   (Bernhard Schommer, review by Armaël Guéneau)

- #9226: Add Seq.unfold.
    (Jeremy Yallop, review by Hezekiah M. Carty, Gabriel Scherer and
    Gabriel Radanne)

- #8771: Lexing: add set_position and set_filename to change (fake)
    the initial tracking position of the lexbuf.
    (Konstantin Romanov, Miguel Lumapat, review by Gabriel Scherer,
     Sébastien Hinderer, and David Allsopp)

- #9059: Added List.filteri function, same as List.filter but
   with the index of the element.
   (Léo Andrès, review by Alain Frisch)

- #8894: Added List.fold_left_map function combining map and fold.
   (Bernhard Schommer, review by Alain Frisch and github user @cfcs)

- #9237: `Format.pp_update_geometry ppf (fun geo -> {geo with ...})`
   for formatter geometry changes that are robust to new geometry fields.
   (Gabriel Scherer, review by Josh Berdine and Florian Angeletti)

- #7110: Added Printf.ikbprintf and Printf.ibprintf
   (Muskan Garg, review by Gabriel Scherer and Florian Angeletti)

- #9365: Set.filter_map and Map.filter_map
   (Gabriel Scherer, review by Stephen Dolan and Nicolás Ojeda Bär)

- #9266: Install pretty-printer for the exception Fun.Finally_raised.
   (Guillaume Munch-Maccagnoni, review by Daniel Bünzli, Gabriel Radanne,
    and Gabriel Scherer)

- #9549, #9557: Make -flarge-toc the default for PowerPC and introduce
   -fsmall-toc to enable the previous behaviour.
   (David Allsopp, report by Nathaniel Wesley Filardo, review by Xavier 
Leroy)

### Other libraries:

- #9106: Register printer for Unix_error in win32unix, as in unix.
   (Christopher Zimmermann, review by David Allsopp)

- #9183: Preserve exception backtrace of exceptions raised by top-level 
phrases
   of dynlinked modules.
   (Nicolás Ojeda Bär, review by Xavier Clerc and Gabriel Scherer)

- #9320, #9550: under Windows, make sure that the Unix.exec* functions
   properly quote their argument lists.
   (Xavier Leroy, report by André Maroneze, review by Nicolás Ojeda Bär
    and David Allsopp)

- #9490, #9505: ensure proper rounding of file times returned by
   Unix.stat, Unix.lstat, Unix.fstat.
   (Xavier Leroy and Guillaume Melquiond, report by David Brown,
    review by Gabriel Scherer and David Allsopp)

### Tools:

- #6969: Argument -nocwd added to ocamldep
   (Muskan Garg, review by Florian Angeletti)

- #8676, #9594: turn debugger off in programs launched by the program
   being debugged
   (Xavier Leroy, report by Michael Soegtrop, review by Gabriel Scherer)

- #9057: aid debugging the debugger by preserving backtraces of unhandled
   exceptions.
   (David Allsopp, review by Gabriel Scherer)

- #9276: objinfo: cm[x]a print extra C options, objects and dlls in
   the order given on the cli. Follow up to #4949.
   (Daniel Bünzli, review by Gabriel Scherer)

- #463: objinfo: better errors on object files coming
   from a different (older or newer), incompatible compiler version.
   (Gabriel Scherer, review by Gabriel Radanne and Damien Doligez)

- #9181: make objinfo work on Cygwin and look for the caml_plugin_header
   symbol in both the static and the dynamic symbol tables.
   (Sébastien Hinderer, review by Gabriel Scherer and David Allsopp)

* #9197: remove compatibility logic from #244 that was designed to
   synchronize toplevel printing margins with Format.std_formatter,
   but also resulted in unpredictable/fragile changes to formatter
   margins.
   Setting the margins on the desired formatters should now work.
   typically on `Format.std_formatter`.
   Note that there currently is no robust way to do this from the
   toplevel, as applications may redirect toplevel printing. In
   a compiler/toplevel driver, one should instead access
   `Location.formatter_for_warnings`; it is not currently exposed
   to the toplevel.
   (Gabriel Scherer, review by Armaël Guéneau)

- #9207, #9210: fix ocamlyacc to work correctly with up to 255 entry
   points to the grammar.
   (Andreas Abel, review by Xavier Leroy)

- #9283, #9455, #9457: add a new toplevel directive `#use_output 
"<command>"` to
   run a command and evaluate its output.
   (Jérémie Dimino, review by David Allsopp)

- #9402: Remove `sudo:false` from .travis.yml
   (Hikaru Yoshimura)

- #9414: testsuite, ocamltest: keep test artifacts only on failure.
   Use KEEP_TEST_DIR_ON_SUCCESS=1 to keep all artifacts.
   (Gabriel Scherer, review by Sébastien Hinderer)

- #9482, #9492: use diversions (@file) to work around OS limitations
   on length of Sys.command argument.
   (Xavier Leroy, report by Jérémie Dimino, review by David Allsopp)

- #9552: restore ocamloptp build and installation
   (Florian Angeletti, review by David Allsopp and Xavier Leroy)

### Manual and documentation:

- #8644: fix formatting comment about @raise in stdlib's mli files
   (Élie Brami, review by David Allsopp)

- #9141: beginning of the ocamltest reference manual
   (Sébastien Hinderer, review by Gabriel Scherer and Thomas Refis)

- #9228: Various Map documentation improvements: add missing key argument in
   the 'merge' example; clarify the relationship between input and 
output keys
   in 'union'; note that find and find_opt return values, not bindings.
   (Jeremy Yallop, review by Gabriel Scherer and Florian Angeletti)

- #9255, #9300: reference chapter, split the expression grammar
   (Florian Angeletti, report by Harrison Ainsworth, review by Gabriel 
Scherer)

- #9325: documented base case for `List.for_all` and `List.exists`
   (Glenn Slotte, review by Florian Angeletti)

- #9403: added a description for warning 67 and added a "." at the end of
   warnings for consistency.
   (Muskan Garg, review by Gabriel Scherer and Florian Angeletti)

- #7708, #9580: Ensure Stdlib documentation index refers to Stdlib.
   (Stephen Dolan, review by Florian Angeletti, report by Hannes Mehnert)

- #9610: manual, C FFI: naked pointers are deprecated, detail the
   forward-compatible options for handling out-of-heap pointers.
   (Xavier Leroy, review by Mark Shinwell, David Allsopp and Florian 
Angeletti)

- #9618: clarify the Format documentation on the margin and maximum 
indentation
   limit
   (Florian Angeletti, review by Josh Berdine)

- #9541: Add a documentation page for the instrumented runtime;
   additional changes to option names in the instrumented runtime.
   (Enguerrand Decorne, review by Anil Madhavapeddy, Gabriel Scherer,
    Daniel Bünzli, David Allsopp, Florian Angeletti,
    and Sébastien Hinderer)

### Compiler user-interface and warnings:

- GPR#1664: make -output-complete-obj link the runtime native c 
libraries when
   building shared libraries like `-output-obj`.
   (Florian Angeletti, review by Nicolás Ojeda Bär)

* #7678, #8631: ocamlc -c and ocamlopt -c pass same switches to the C
   compiler when compiling .c files (in particular, this means ocamlopt
   passes -fPIC on systems requiring it for shared library support).
   (David Allsopp, report by Daniel Bünzli, review by Sébastien Hinderer)

- #9074: reworded error message for non-regular structural types
   (Florian Angeletti, review by Jacques Garrigue and Leo White,
    report by Chas Emerick)

- #8938: Extend ocamlopt option "-stop-after" to handle "scheduling" 
argument.
   (Greta Yorsh, review by Florian Angeletti and Sébastien Hinderer)

- #8945, #9086: Fix toplevel show directive to work with constructors
   (Simon Parry, review by Gabriel Scherer, Jeremy Yallop,
   Alain Frisch, Florian Angeletti)

- #9107: improved error message for exceptions in module signature errors
   (Gabriel Scherer, review by Florian Angeletti)

- #9208: -dno-locations option to hide source locations (and debug events)
   from intermediate-representation dumps (-dfoo).
   (Gabriel Scherer, review by Vincent Laviron)

- #9393: Improve recursive module usage warnings
   (Leo White, review by Thomas Refis)

- #2141: generate .annot files from cmt data; deprecate -annot.
   (Nicolás Ojeda Bär, review by Alain Frisch, Gabriel Scherer and Damien
   Doligez)

- #9486: Fix configuration for the Haiku operating system
   (Sylvain Kerjean, review by David Allsopp and Sébastien Hinderer)

- #9712: Update the version format to allow "~".
   The new format is "major.minor[.patchlevel][(+|~)additional-info]",
   for instance "4.12.0~beta1+flambda".
   This is a documentation-only change for the 4.11 branch, the new format
   will be used starting with the 4.12 branch.
   (Florian Angeletti, review by Damien Doligez and Xavier Leroy)

### Internal/compiler-libs changes:

  - #463: a new Misc.Magic_number module for user-friendly parsing
    and validation of OCaml magic numbers.
    (Gabriel Scherer, review by Gabriel Radanne and Damien Doligez)

- #1176: encourage better compatibility with older Microsoft C compilers by
   using GCC's -Wdeclaration-after-statement when available. Introduce
   Caml_inline to stop abuse of the inline keyword on MSVC and to help 
ensure
   that only static inline is used in the codebase (erroneous instance in
   runtime/win32.c removed).
   (David Allsopp, review by Oliver Andrieu and Xavier Leroy)

- #8934: Stop relying on location to track usage
   (Thomas Refis, review by Gabriel Radanne)

- #8970: separate value patterns (matching on values) from computation 
patterns
   (matching on the effects of a copmutation) in the typedtree.
   (Gabriel Scherer, review by Jacques Garrigue and Alain Frisch)

- #9060: ensure that Misc.protect_refs preserves backtraces
   (Gabriel Scherer, review by Guillaume Munch-Maccagnoni and David Allsopp)

- #9021: expose compiler Longident.t parsers
   (Florian Angeletti, review by Gabriel Scherer)

- #9078: make all compilerlibs/ available to ocamltest.
   (Gabriel Scherer, review by Sébastien Hinderer)

- #9079: typecore/parmatch: refactor ppat_of_type and refine
   the use of backtracking on wildcard patterns
   (Florian Angeletti, Jacques Garrigue, Gabriel Scherer,
    review by Thomas Refis)

- #9081: typedtree, make the pat_env field of pattern data immutable
   (Gabriel Scherer, review by Jacques Garrigue, report by Alain Frisch)

- #9178, #9182, #9196: refactor label-disambiguation (Typecore.NameChoice)
   (Gabriel Scherer, Thomas Refis, Florian Angeletti and Jacques Garrigue,
    reviewing each other without self-loops)

- #9321, #9322, #9359, #9361, #9417, #9447: refactor the
   pattern-matching compiler
   (Thomas Refis and Gabriel Scherer, review by Florian Angeletti)

- #9211, #9215, #9222: fix Makefile dependencies in
   compilerlibs, dynlink, ocamltest.
   (Gabriel Scherer, review by Vincent Laviron and David Allsopp)

- #9305: Avoid polymorphic compare in Ident
   (Leo White, review by Xavier Leroy and Gabriel Scherer)

- #7927: refactor val_env met_env par_env to class_env
   (Muskan Garg, review by Gabriel Scherer and Florian Angeletti)

- #2324, #9613: Replace the caml_int_compare and caml_float_compare
   (C functions) with primitives.
   (Greta Yorsh, review by Stephen Dolan and Vincent Laviron)

- #9246: Avoid rechecking functor applications
   (Leo White, review by Jacques Garrigue)

* #9411: forbid optional arguments reordering with -nolabels
   (Thomas Refis, review by Frédéric Bour and Jacques Garrigue)

- #9452: Add locations to docstring attributes
   (Leo White, review by Gabriel Scherer)

### Build system:

- #9250: Add --disable-ocamltest to configure and disable building for
   non-development builds.
   (David Allsopp, review by Sébastien Hinderer)

### Bug fixes:

- #7520, #9547: Odd behaviour of refutation cases with polymorphic variants
   (Jacques Garrigue, report by Leo White, reviews by Gabriel Scherer 
and Leo)

- #7562, #9456: ocamlopt-generated code crashed on Alpine Linux on
   ppc64le, arm, and i386.  Fixed by turning PIE off for musl-based Linux
   systems except amd64 (x86_64) and s390x.
   (Xavier Leroy, review by Gabriel Scherer)

- #7683, #1499: Fixes one case where the evaluation order in native-code
   may not match the one in bytecode.
   (Nicolás Ojeda Bär, report by Pierre Chambart, review by Gabriel Scherer)

- #7696, #6608: Record expression deleted when all fields specified
   (Jacques Garrigue, report by Jeremy Yallop)

- #7741, #9645: Failure to report escaping type variable
   (Jacques Garrigue, report by Gabriel Radanne, review by Gabriel Scherer)

- #7817, #9546: Unsound inclusion check for polymorphic variant
   (Jacques Garrigue, report by Mikhail Mandrykin, review by Gabriel 
Scherer)

- #7897, #9537: Fix warning 38 for rebound extension constructors
   (Leo White, review by Florian Angeletti)

- #7917, #9426: Use GCC option -fexcess-precision=standard when available,
   avoiding a problem with x87 excess precision in Float.round.
   (Xavier Leroy, review by Sébastien Hinderer)

- #9011: Allow linking .cmxa files with no units on MSVC by not 
requiring the
   .lib file to be present.
   (David Allsopp, report by Dimitry Bely, review by Xavier Leroy)

- #9064: Relax the level handling when unifying row fields
   (Leo White, review by Jacques Garrigue)

- #9097: Do not emit references to dead labels introduced by #2321 
(spacetime).
   (Greta Yorsh, review by Mark Shinwell)

- #9163: Treat loops properly in un_anf
   (Leo White, review by Mark Shinwell, Pierre Chambart and Vincent Laviron)

- #9189, #9281: fix a conflict with Gentoo build system
   by removing an one-letter Makefile variable.
   (Florian Angeletti, report by Ralph Seichter, review by David Allsopp
    and Damien Doligez)

- #9225: Do not drop bytecode debug info after C calls.
   (Stephen Dolan, review by Gabriel Scherer and Jacques-Henri Jourdan)

- #9231: Make sure a debug event (and the corresponding debug
   information) is inserted after every primitive that can appear in a
   collected call stack, and make sure ocamlc preserves such events
   even if they are at tail position.
   (Jacques-Henri Jourdan, review by Gabriel Scherer)

- #9244: Fix some missing usage warnings
   (Leo White, review by Florian Angeletti)

- #9274, avoid reading cmi file while printing types
   (Florian Angeletti, review by Gabriel Scherer)

- #9307, #9345: reproducible env summaries for reproducible compilation
   (Florian Angeletti, review by Leo White)

- #9309, #9318: Fix exhaustivity checking with empty types
   (Florian Angeletti, Stefan Muenzel and Thomas Refis, review by 
Gabriel Scherer
   and Thomas Refis)

- #9335: actually have --disable-stdlib-manpages not build the manpages
   (implementation conflicted with #8837 which wasn't picked up in review)
   (David Allsopp, review by Florian Angeletti and Sébastien Hinderer)

- #9343: Re-enable `-short-paths` for some error messages
   (Leo White, review by Florian Angeletti)

- #9355, #9356: ocamldebug, fix a fatal error when printing values
   whose type involves a functor application.
   (Florian Angeletti, review by Gabriel Scherer, report by Cyril Six)

- #9367: Make bytecode and native-code backtraces agree.
   (Stephen Dolan, review by Gabriel Scherer)

- #9375, #9477: add forgotten substitution when compiling anonymous modules
   (Thomas Refis, review by Frédéric Bour, report by Andreas Hauptmann)

- #9384, #9385: Fix copy scope bugs in substitutions
   (Leo White, review by Thomas Refis, report by Nick Roberts)

* #9388: Prohibit signature local types with constraints
   (Leo White, review by Jacques Garrigue)

- #9406, #9409: fix an error with packed module types from missing
   cmis.
   (Florian Angeletti, report by Thomas Leonard, review by Gabriel Radanne
    and Gabriel Scherer)

- #9415: Treat `open struct` as `include struct` in toplevel
   (Leo White, review by Thomas Refis)

- #9416: Avoid warning 58 in flambda ocamlnat
   (Leo White, review by Florian Angeletti)

- #9420: Fix memory leak when `caml_output_value_to_block` raises an 
exception
   (Xavier Leroy, review by Guillaume Munch-Maccagnoni)

- #9428: Fix truncated exception backtrace for C->OCaml callbacks
   on Power and Z System
   (Xavier Leroy, review by Nicolás Ojeda Bär)

- #9623, #9642: fix typing environments in Typedecl.transl_with_constraint
   (Gabriel Scherer, review by Jacques Garrigue and Leo White,
    report by Hugo Heuzard)

- #9695, #9702: no error when opening an alias to a missing module
   (Jacques Garrigue, report and review by Gabriel Scherer)