[cwn] Attn: Development Editor, Latest OCaml Weekly News
Alan Schmitt
alan.schmitt at polytechnique.org
Tue Mar 2 06:10:31 PST 2021
Hello
Here is the latest OCaml Weekly News, for the week of February 23 to
March 02, 2021.
Table of Contents
─────────────────
Release of `fmlib.0.1.0'
Resources for building a Polymorphic Lambda Calculus compiler?
OCaml 4.12.0 released (with 4.11.2 too)
latest batteries release: v3.3.0
Other OCaml News
Old CWN
Release of `fmlib.0.1.0'
════════════════════════
Archive:
<https://discuss.ocaml.org/t/ann-release-of-fmlib-0-1-0/7352/1>
Hbr announced
─────────────
I am pleased to announce the release of the first version (0.1) of
`fmlib', a functional monadic library.
Beside some primitive data types `fmlib' has support for
• pretty printing
• combinator parsing
It features a functional monadic style of programming.
The pretty printer does not actually print. It generates a lazy stream
of characters and can therefore adapted to any input/output method.
The parsers are combinator parsers which can parse indentation
sensitive content easily. The combinators are `parsec' like. The
parsers are fully incremental and do not read any data. Therefore you
can choose your on input method and just push the read characters (or
bytes) into the parser until success or failure is reached.
`fmlib' can be installed from opam via `opam install fmlib'.
Please read the [documentation here]
Any comments, issues etc. are welcome.
[documentation here] <https://hbr.github.io/fmlib/odoc>
Resources for building a Polymorphic Lambda Calculus compiler?
══════════════════════════════════════════════════════════════
Archive:
<https://discuss.ocaml.org/t/resources-for-building-a-polymorphic-lambda-calculus-compiler/7357/1>
Tom Brunoli asked
─────────────────
Hey all, apologies if this isn't a good place to post this, but this
board seems like a good intersection of folks interested in FP, type
theory, and compilers (and obviously OCaml).
I'm currently trying to write a functional programming language in
OCaml without formal knowledge of type theory or compilers (I don't
have a CS degree). I've been reading up as much as I can across a lot
of different papers, github projects, and some books that I've found
online. Slowly I think I've started to build some of the knowledge I
may have gotten from a compilers course.
So far I've implemented a type checker for higher-kinded polymorphic
lambda calculus (System F omega - [code is here]), but I've found it
incredibly hard to find resources on going from this to a
call-by-value compiled program. I decided to implement System F Omega
because I read that it's what one of Haskell's intermediate
representations are built upon. System F is a really painful term to
google, and most resources I've found are about formal verification or
are nigh impenetrable for a hobbyist.
Ideally i'd like to take a type-checked System-F-omega AST and output
LLVM, Cranelift or webassembly IR, but I don't know what steps I'm
missing in the middle. I have read enough to know that I'll probably
need some kind of abstract machine, and need to somehow convert that
to CPS or SSA form before I can get it to machine code. I have heard
about a few different abstract machines (Like G-Machine, SECD,
Krivine), and have read about the CPS transform, but I don't think I
have enough knowledge or context to put them all together in practice.
I have found plenty of resources on the type-inference side of things
so I don't think that'll be a big issue (famous last words
:sweat_smile:).
Does anyone know any resources I should check out related to the
above? Again, apologies for the somewhat off-topic post.
[code is here] <https://github.com/tominated/system_f_omega/>
Jack Feser replied
──────────────────
Have you seen "Implementing functional languages: a tutorial"? Might
have some more of the practical side that you're looking for.
<https://www.microsoft.com/en-us/research/publication/implementing-functional-languages-a-tutorial/>
Josh Berdine also replied
─────────────────────────
I think you probably can't go wrong by having a read of:
J. Gregory Morrisett, David Walker, Karl Crary, Neal Glew: From system
F to typed assembly language. ACM Trans. Program. Lang. Syst. 21(3):
527-568 (1999)
Also, while not about the type systems you mention, the Rabbit and
series of "Lambda the Ultimate" papers are excellent.
dimitris also replied
─────────────────────
Hi, maybe this is a good starting point or at least useful reading:
• "Compiling functional languages"
<https://xavierleroy.org/talks/compilation-agay.pdf>
• "From Krivine’s machine to the Caml implementations"
<https://xavierleroy.org/talks/zam-kazam05.pdf>
Qifan Wang also replied
───────────────────────
I think Appel’s famous book /Compiling with Continuations/ is still
practically enough for compiling call by value typed programs to
assembly using CPS along.
OCaml 4.12.0 released (with 4.11.2 too)
═══════════════════════════════════════
Archive:
<https://discuss.ocaml.org/t/ocaml-4-12-0-released-with-4-11-2-too/7358/2>
octachron announced
───────────────────
The OCaml team has the pleasure of celebrating the birthday of Jacques
de Vaucanson by announcing the joint releases of OCaml version 4.12.0
and 4.11.2.
Some of the highlights in the 4.12.0 release are:
• Major progress in reducing the difference between the mainline and
multicore runtime
• A new configuration option `ocaml-option-nnpchecker' which emits an
alarm when the garbage collector finds out-of-heap pointers that
could cause a crash in the multicore runtime
• Support for macOS/arm64
• Mnemonic names for warnings
• Many quality of life improvements
• Many bug fixes
The 4.11.2 release is a collection of safe bug fixes, cherry-picked
from the 4.12.0 development cycle. If you were using OCaml 4.11.1 and
cannot yet upgrade to 4.12.0, this release is for you.
The full list of changes can be found in the changelogs below.
Those releases are available as OPAM switches, and as a source
download here:
• <https://github.com/ocaml/ocaml/archive/4.12.0.tar.gz>
• <https://caml.inria.fr/pub/distrib/ocaml-4.12/>
and there:
• <https://github.com/ocaml/ocaml/archive/4.11.2.tar.gz>
• <https://caml.inria.fr/pub/distrib/ocaml-4.11/>
Happy hacking,
– Florian Angeletti for the OCaml team.
OCaml 4.11.2 (24 February 2021)
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
Build system:
┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9938], [9939]: Define __USE_MINGW_ANSI_STDIO=0 for the mingw-w64
ports to prevent their C99-compliant snprintf conflicting with
ours. (David Allsopp, report by Michael Soegtrop, review by Xavier
Leroy)
[9938] <https://github.com/ocaml/ocaml/issues/9938>
[9939] <https://github.com/ocaml/ocaml/issues/9939>
Runtime system:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [10056]: Memprof: ensure young_trigger is within the bounds of the
minor heap in caml_memprof_renew_minor_sample (regression from
[8684]) (David Allsopp, review by Guillaume Munch-Maccagnoni and
Jacques-Henri Jourdan)
• [9654]: More efficient management of code fragments. (Xavier Leroy,
review by Jacques-Henri Jourdan, Damien Doligez, and Stephen Dolan)
[10056] <https://github.com/ocaml/ocaml/issues/10056>
[8684] <https://github.com/ocaml/ocaml/issues/8684>
[9654] <https://github.com/ocaml/ocaml/issues/9654>
Tools:
┄┄┄┄┄┄
• [9606], [9635], [9637]: fix performance regression in the debugger
(behaviors quadratic in the size of the debugged program) (Xavier
Leroy, report by Jacques Garrigue and Virgile Prevosto, review by
David Allsopp and Jacques-Henri Jourdan)
[9606] <https://github.com/ocaml/ocaml/issues/9606>
[9635] <https://github.com/ocaml/ocaml/issues/9635>
[9637] <https://github.com/ocaml/ocaml/issues/9637>
Code generation and optimizations:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9969], [9981]: Added mergeable flag to ELF sections containing
mergeable constants. Fixes compatibility with the integrated
assembler in clang 11.0.0. (Jacob Young, review by Nicolás Ojeda
Bär)
[9969] <https://github.com/ocaml/ocaml/issues/9969>
[9981] <https://github.com/ocaml/ocaml/issues/9981>
Bug fixes:
┄┄┄┄┄┄┄┄┄┄
• [9970], [10010]: fix the declaration scope of extensible-datatype
constructors. A regression that dates back to 4.08 makes
extensible-datatype constructors with inline records very fragile,
for example: `type 'a t += X of {x : 'a}' (Gabriel Scherer, review
by Thomas Refis and Leo White, report by Nicolás Ojeda Bär)
• [9096], [10096]: fix a 4.11.0 performance regression in
classes/objects declared within a function (Gabriel Scherer, review
by Leo White, report by Sacha Ayoun)
• [9326], [10125]: Gc.set incorrectly handles the three `custom_*'
fields, causing a performance regression (report by Emilio Jesús
Gallego Arias, analysis and fix by Stephen Dolan, code by Xavier
Leroy, review by Hugo Heuzard and Gabriel Scherer)
[9970] <https://github.com/ocaml/ocaml/issues/9970>
[10010] <https://github.com/ocaml/ocaml/issues/10010>
[9096] <https://github.com/ocaml/ocaml/issues/9096>
[10096] <https://github.com/ocaml/ocaml/issues/10096>
[9326] <https://github.com/ocaml/ocaml/issues/9326>
[10125] <https://github.com/ocaml/ocaml/issues/10125>
OCaml 4.12.0 (24 February 2021)
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
Supported platforms (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9699]: add support for iOS and macOS on ARM 64 bits (Eduardo
Rafael, review by Xavier Leroy, Nicolás Ojeda Bär and Anil
Madhavapeddy, additional testing by Michael Schmidt)
[9699] <https://github.com/ocaml/ocaml/issues/9699>
Standard library (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9797]: Add Sys.mkdir and Sys.rmdir. (David Allsopp, review by
Nicolás Ojeda Bär, Sébastien Hinderer and Xavier Leroy)
• *breaking change* [9765]: add init functions to Bigarray. (Jeremy
Yallop, review by Gabriel Scherer, Nicolás Ojeda Bär, and Xavier
Leroy)
• *breaking change* [9668]: List.equal, List.compare (This could break
code using "open List" by shadowing Stdlib.{equal,compare}.)
(Gabriel Scherer, review by Nicolás Ojeda Bär, Daniel Bünzli and
Alain Frisch)
• [9066]: a new Either module with `type 'a Either.t = Left of 'a |
Right of 'b' (Gabriel Scherer, review by Daniel Bünzli, Thomas
Refis, Jeremy Yallop)
• [9066]: `List.partition_map : ('a -> ('b, 'c) Either.t) -> 'a list
-> 'b list * 'c list' (Gabriel Scherer, review by Jeremy Yallop)
• [9865]: add Format.pp_print_seq (Raphaël Proust, review by Nicolás
Ojeda Bär)
[9797] <https://github.com/ocaml/ocaml/issues/9797>
[9765] <https://github.com/ocaml/ocaml/issues/9765>
[9668] <https://github.com/ocaml/ocaml/issues/9668>
[9066] <https://github.com/ocaml/ocaml/issues/9066>
[9865] <https://github.com/ocaml/ocaml/issues/9865>
Compiler user-interface and warnings (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9657]: Warnings can now be referred to by their mnemonic name. The
names are displayed using `-warn-help` and can be utilized anywhere
where a warning list specification is expected.
┌────
│ ocamlc -w +fragile-match
│ ...[@@ocaml.warning "-fragile-match"]
└────
Note that only a single warning name at a time is supported for now:
"-w +foo-bar" does not work, you must use "-w +foo -w -bar".
(Nicolás Ojeda Bär, review by Gabriel Scherer, Florian Angeletti and
Leo White)
• [8939]: Command-line option to save Linear IR before emit. (Greta
Yorsh, review by Mark Shinwell, Sébastien Hinderer and Frédéric
Bour)
• [9003]: Start compilation from Emit when the input file is in Linear
IR format. (Greta Yorsh, review by Jérémie Dimino, Gabriel Scherer
and Frédéric Bour)
[9657] <https://github.com/ocaml/ocaml/issues/9657>
[8939] <https://github.com/ocaml/ocaml/issues/8939>
[9003] <https://github.com/ocaml/ocaml/issues/9003>
Language features (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• *breaking change* [9500], [9727], [9866], [9870], [9873]:
Injectivity annotations One can now mark type parameters as
injective, which is useful for abstract types:
┌────
│ module Vec : sig type !'a t end = struct type 'a t = 'a array end
└────
On non-abstract types, this can be used to check the injectivity of
parameters. Since all parameters of record and sum types are by
definition injective, this only makes sense for type abbreviations:
┌────
│ type !'a t = 'a list
└────
Note that this change required making the regularity check stricter.
(Jacques Garrigue, review by Jeremy Yallop and Leo White)
[9500] <https://github.com/ocaml/ocaml/issues/9500>
[9727] <https://github.com/ocaml/ocaml/issues/9727>
[9866] <https://github.com/ocaml/ocaml/issues/9866>
[9870] <https://github.com/ocaml/ocaml/issues/9870>
[9873] <https://github.com/ocaml/ocaml/issues/9873>
Runtime system (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9534], [9947]: Introduce a naked pointers checker mode to the
runtime (configure option –enable-naked-pointers-checker). Alarms
are printed when the garbage collector finds out-of-heap pointers
that could cause a crash in no-naked-pointers mode. (Enguerrand
Decorne, KC Sivaramakrishnan, Xavier Leroy, Stephen Dolan, David
Allsopp, Nicolás Ojeda Bär review by Xavier Leroy, Nicolás Ojeda
Bär)
• *breaking change* [1128], [7503], [9036], [9722], [10069]:
EINTR-based signal handling. When a signal arrives, avoid running
its OCaml handler in the middle of a blocking section. Instead,
allow control to return quickly to a polling point where the signal
handler can safely run, ensuring that I/O locks are not held while
it runs. A polling point was removed from
caml_leave_blocking_section, and one added to caml_raise. (Stephen
Dolan, review by Goswin von Brederlow, Xavier Leroy, Damien
Doligez, Anil Madhavapeddy, Guillaume Munch-Maccagnoni and Jacques-
Henri Jourdan)
• *breaking change* [5154], [9569], [9734]: Add `Val_none',
`Some_val', `Is_none', `Is_some', `caml_alloc_some', and
`Tag_some'. As these macros are sometimes defined by authors of C
bindings, this change may cause warnings/errors in case of
redefinition. (Nicolás Ojeda Bär, review by Stephen Dolan, Gabriel
Scherer, Mark Shinwell, and Xavier Leroy)
• *breaking change* [9674]: Memprof: guarantee that an allocation
callback is always run in the same thread the allocation takes
place (Jacques-Henri Jourdan, review by Stephen Dolan)
• [10025]: Track custom blocks (e.g. Bigarray) with Memprof (Stephen
Dolan, review by Leo White, Gabriel Scherer and Jacques-Henri
Jourdan)
• [9619]: Change representation of function closures so that code
pointers can be easily distinguished from environment variables
(Xavier Leroy, review by Mark Shinwell and Damien Doligez)
• [9654]: More efficient management of code fragments. (Xavier Leroy,
review by Jacques-Henri Jourdan, Damien Doligez, and Stephen Dolan)
[9534] <https://github.com/ocaml/ocaml/issues/9534>
[9947] <https://github.com/ocaml/ocaml/issues/9947>
[1128] <https://github.com/ocaml/ocaml/issues/1128>
[7503] <https://github.com/ocaml/ocaml/issues/7503>
[9036] <https://github.com/ocaml/ocaml/issues/9036>
[9722] <https://github.com/ocaml/ocaml/issues/9722>
[10069] <https://github.com/ocaml/ocaml/issues/10069>
[5154] <https://github.com/ocaml/ocaml/issues/5154>
[9569] <https://github.com/ocaml/ocaml/issues/9569>
[9734] <https://github.com/ocaml/ocaml/issues/9734>
[9674] <https://github.com/ocaml/ocaml/issues/9674>
[10025] <https://github.com/ocaml/ocaml/issues/10025>
[9619] <https://github.com/ocaml/ocaml/issues/9619>
[9654] <https://github.com/ocaml/ocaml/issues/9654>
Other libraries (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9573]: reimplement Unix.create_process and related functions
without Unix.fork, for better efficiency and compatibility with
threads. (Xavier Leroy, review by Gabriel Scherer and Anil
Madhavapeddy)
• [9575]: Add Unix.is_inet6_addr (Nicolás Ojeda Bär, review by Xavier
Leroy)
• [9930]: new module Semaphore in the thread library, implementing
counting semaphores and binary semaphores (Xavier Leroy, review by
Daniel Bünzli and Damien Doligez, additional suggestions by Stephen
Dolan and Craig Ferguson)
• *breaking change* [9206], [9419]: update documentation of the
threads library; deprecate Thread.kill, Thread.wait_read,
Thread.wait_write, and the whole ThreadUnix module. (Xavier Leroy,
review by Florian Angeletti, Guillaume Munch-Maccagnoni, and Gabriel
Scherer)
[9573] <https://github.com/ocaml/ocaml/issues/9573>
[9575] <https://github.com/ocaml/ocaml/issues/9575>
[9930] <https://github.com/ocaml/ocaml/issues/9930>
[9206] <https://github.com/ocaml/ocaml/issues/9206>
[9419] <https://github.com/ocaml/ocaml/issues/9419>
Manual and documentation (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9755]: Manual: post-processing the html generated by ocamldoc and
hevea. Improvements on design and navigation, including a mobile
version, and a quick-search functionality for the API. (San Vũ
Ngọc, review by David Allsopp and Florian Angeletti)
• [9468]: HACKING.adoc: using dune to get merlin support (Thomas
Refis, review by Gabriel Scherer)
• [9684]: document in address_class.h the runtime value model in
naked-pointers and no-naked-pointers mode (Xavier Leroy and Gabriel
Scherer)
[9755] <https://github.com/ocaml/ocaml/issues/9755>
[9468] <https://github.com/ocaml/ocaml/issues/9468>
[9684] <https://github.com/ocaml/ocaml/issues/9684>
Internal/compiler-libs changes (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9464], [9493], [9520], [9563], [9599], [9608], [9647]: refactor the
pattern-matching compiler (Thomas Refis and Gabriel Scherer, review
by Florian Angeletti)
• [9696]: ocamltest now shows its log when a test fails. In addition,
the log contains the output of executed programs. (Nicolás Ojeda
Bär, review by David Allsopp, Sébastien Hinderer and Gabriel
Scherer)
[9464] <https://github.com/ocaml/ocaml/issues/9464>
[9493] <https://github.com/ocaml/ocaml/issues/9493>
[9520] <https://github.com/ocaml/ocaml/issues/9520>
[9563] <https://github.com/ocaml/ocaml/issues/9563>
[9599] <https://github.com/ocaml/ocaml/issues/9599>
[9608] <https://github.com/ocaml/ocaml/issues/9608>
[9647] <https://github.com/ocaml/ocaml/issues/9647>
[9696] <https://github.com/ocaml/ocaml/issues/9696>
Build system (highlights):
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9824], [9837]: Honour the CFLAGS and CPPFLAGS variables. (Sébastien
Hinderer, review by David Allsopp)
• [10063]: (Re-)enable building on illumos (SmartOS, OmniOS, …) and
Oracle Solaris; x86_64/GCC and 64-bit SPARC/Sun PRO C compilers.
(partially revert [2024]). (Tõivo Leedjärv and Konstantin Romanov,
review by Gabriel Scherer, Sébastien Hinderer and Xavier Leroy)
[9824] <https://github.com/ocaml/ocaml/issues/9824>
[9837] <https://github.com/ocaml/ocaml/issues/9837>
[10063] <https://github.com/ocaml/ocaml/issues/10063>
[2024] <https://github.com/ocaml/ocaml/issues/2024>
Language features:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [1655]: pattern aliases do not ignore type constraints (Thomas
Refis, review by Jacques Garrigue and Gabriel Scherer)
• [9429]: Add unary operators containing `#' to the parser for use in
ppx rewriters (Leo White, review by Damien Doligez)
[1655] <https://github.com/ocaml/ocaml/issues/1655>
[9429] <https://github.com/ocaml/ocaml/issues/9429>
Runtime system:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• *breaking change* [9697]: Remove the Is_in_code_area macro and the
registration of DLL code areas in the page table, subsumed by the
new code fragment management API (Xavier Leroy, review by
Jacques-Henri Jourdan)
• [9756]: garbage collector colors change removes the gray color from
the major gc (Sadiq Jaffer and Stephen Dolan reviewed by Xavier
Leroy, KC Sivaramakrishnan, Damien Doligez and Jacques-Henri
Jourdan)
• *breaking change* [9513]: Selectively initialise blocks in
`Obj.new_block'. Reject `Custom_tag' objects and zero-length
`String_tag' objects. (KC Sivaramakrishnan, review by David
Allsopp, Xavier Leroy, Mark Shinwell and Leo White)
• [9564]: Add a macro to construct out-of-heap block header. (KC
Sivaramakrishnan, review by Stephen Dolan, Gabriel Scherer, and
Xavier Leroy)
• [9951]: Ensure that the mark stack push optimisation handles naked
pointers (KC Sivaramakrishnan, reported by Enguerrand Decorne,
review by Gabriel Scherer, and Xavier Leroy)
• [9678]: Reimplement `Obj.reachable_words' using a hash table to
detect sharing, instead of temporary in-place modifications. This
is a prerequisite for Multicore OCaml. (Xavier Leroy, review by
Jacques-Henri Jourdan and Sébastien Hinderer)
• [1795], [9543]: modernize signal handling on Linux i386, PowerPC,
and s390x, adding support for Musl ppc64le along the way. (Xavier
Leroy and Anil Madhavapeddy, review by Stephen Dolan)
• [9648], [9689]: Update the generic hash function to take advantage
of the new representation for function closures (Xavier Leroy,
review by Stephen Dolan)
• [9649]: Update the marshaler (output_value) to take advantage of the
new representation for function closures (Xavier Leroy, review by
Damien Doligez)
• [10050]: update {PUSH,}OFFSETCLOSURE* bytecode instructions to match
new representation for closures (Nathanaël Courant, review by Xavier
Leroy)
• [9728]: Take advantage of the new closure representation to simplify
the compaction algorithm and remove its dependence on the page table
(Damien Doligez, review by Jacques-Henri Jourdan and Xavier Leroy)
• [2195]: Improve error message in bytecode stack trace printing and
load debug information during bytecode startup if OCAMLRUNPARAM=b=2.
(David Allsopp, review by Gabriel Scherer and Xavier Leroy)
• [9466]: Memprof: optimize random samples generation. (Jacques-Henri
Jourdan, review by Xavier Leroy and Stephen Dolan)
• [9628]: Memprof: disable sampling when memprof is suspended.
(Jacques-Henri Jourdan, review by Gabriel Scherer and Stephen Dolan)
• [10056]: Memprof: ensure young_trigger is within the bounds of the
minor heap in caml_memprof_renew_minor_sample (regression from
[8684]) (David Allsopp, review by Guillaume Munch-Maccagnoni and
Jacques-Henri Jourdan)
• [9506]: Remove support for FreeBSD prior to 4.0R, that required
explicit floating-point initialization to behave like IEEE standard
(Hannes Mehnert, review by David Allsopp)
• [8807], [9503]: Use different symbols for do_local_roots on bytecode
and native (Stephen Dolan, review by David Allsopp and Xavier Leroy)
• [9670]: Report full major collections in Gc stats. (Leo White,
review by Gabriel Scherer)
• [9675]: Remove the caml_static_{alloc,free,resize} primitives, now
unused. (Xavier Leroy, review by Gabriel Scherer)
• [9710]: Drop "support" for an hypothetical JIT for OCaml bytecode
which has never existed. (Jacques-Henri Jourdan, review by Xavier
Leroy)
• [9742], [9989]: Ephemerons are now compatible with infix pointers
occurring when using mutually recursive functions. (Jacques-Henri
Jourdan, review by François Bobot)
• [9888], [9890]: Fixes a bug in the `riscv' backend where register t0
was not saved/restored when performing a GC. This could potentially
lead to a segfault. (Nicolás Ojeda Bär, report by Xavier Leroy,
review by Xavier Leroy)
• [9907]: Fix native toplevel on native Windows. (David Allsopp,
review by Florian Angeletti)
• [9909]: Remove caml_code_area_start and caml_code_area_end globals
(no longer needed as the pagetable heads towards retirement).
(David Allsopp, review by Xavier Leroy)
• [9949]: Clarify documentation of GC message 0x1 and make sure it is
displayed every time a major cycle is forcibly finished. (Damien
Doligez, review by Xavier Leroy)
• [10062]: set ARCH_INT64_PRINTF_FORMAT correctly for both modes of
mingw-w64 (David Allsopp, review by Xavier Leroy)
[9697] <https://github.com/ocaml/ocaml/issues/9697>
[9756] <https://github.com/ocaml/ocaml/issues/9756>
[9513] <https://github.com/ocaml/ocaml/issues/9513>
[9564] <https://github.com/ocaml/ocaml/issues/9564>
[9951] <https://github.com/ocaml/ocaml/issues/9951>
[9678] <https://github.com/ocaml/ocaml/issues/9678>
[1795] <https://github.com/ocaml/ocaml/issues/1795>
[9543] <https://github.com/ocaml/ocaml/issues/9543>
[9648] <https://github.com/ocaml/ocaml/issues/9648>
[9689] <https://github.com/ocaml/ocaml/issues/9689>
[9649] <https://github.com/ocaml/ocaml/issues/9649>
[10050] <https://github.com/ocaml/ocaml/issues/10050>
[9728] <https://github.com/ocaml/ocaml/issues/9728>
[2195] <https://github.com/ocaml/ocaml/issues/2195>
[9466] <https://github.com/ocaml/ocaml/issues/9466>
[9628] <https://github.com/ocaml/ocaml/issues/9628>
[10056] <https://github.com/ocaml/ocaml/issues/10056>
[8684] <https://github.com/ocaml/ocaml/issues/8684>
[9506] <https://github.com/ocaml/ocaml/issues/9506>
[8807] <https://github.com/ocaml/ocaml/issues/8807>
[9503] <https://github.com/ocaml/ocaml/issues/9503>
[9670] <https://github.com/ocaml/ocaml/issues/9670>
[9675] <https://github.com/ocaml/ocaml/issues/9675>
[9710] <https://github.com/ocaml/ocaml/issues/9710>
[9742] <https://github.com/ocaml/ocaml/issues/9742>
[9989] <https://github.com/ocaml/ocaml/issues/9989>
[9888] <https://github.com/ocaml/ocaml/issues/9888>
[9890] <https://github.com/ocaml/ocaml/issues/9890>
[9907] <https://github.com/ocaml/ocaml/issues/9907>
[9909] <https://github.com/ocaml/ocaml/issues/9909>
[9949] <https://github.com/ocaml/ocaml/issues/9949>
[10062] <https://github.com/ocaml/ocaml/issues/10062>
Code generation and optimizations:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9551]: ocamlc no longer loads DLLs at link time to check that
external functions referenced from OCaml code are defined. Instead,
.so/.dll files are parsed directly by pure OCaml code. (Nicolás
Ojeda Bär, review by Daniel Bünzli, Gabriel Scherer, Anil
Madhavapeddy, and Xavier Leroy)
• [9620]: Limit the number of parameters for an uncurried or untupled
function. Functions with more parameters than that are left
partially curried or tupled. (Xavier Leroy, review by Mark
Shinwell)
• [9752]: Revised handling of calling conventions for external C
functions. Provide a more precise description of the types of
unboxed arguments, so that the ARM64 iOS/macOS calling conventions
can be honored. (Xavier Leroy, review by Mark Shinwell and Eduardo
Rafael)
• [9838]: Ensure that Cmm immediates are generated as Cconst_int where
possible, improving instruction selection. (Stephen Dolan, review
by Leo White and Xavier Leroy)
• [9864]: Revised recognition of immediate arguments to integer
operations. Fixes several issues that could have led to producing
assembly code that is rejected by the assembler. (Xavier Leroy,
review by Stephen Dolan)
• [9969], [9981]: Added mergeable flag to ELF sections containing
mergeable constants. Fixes compatibility with the integrated
assembler in clang 11.0.0. (Jacob Young, review by Nicolás Ojeda
Bär)
[9551] <https://github.com/ocaml/ocaml/issues/9551>
[9620] <https://github.com/ocaml/ocaml/issues/9620>
[9752] <https://github.com/ocaml/ocaml/issues/9752>
[9838] <https://github.com/ocaml/ocaml/issues/9838>
[9864] <https://github.com/ocaml/ocaml/issues/9864>
[9969] <https://github.com/ocaml/ocaml/issues/9969>
[9981] <https://github.com/ocaml/ocaml/issues/9981>
Standard library:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9781]: add injectivity annotations to parameterized abstract types
(Jeremy Yallop, review by Nicolás Ojeda Bär)
• *breaking change* [9554]: add primitive __FUNCTION__ that returns
the name of the current method or function, including any enclosing
module or class. (Nicolás Ojeda Bär, Stephen Dolan, review by
Stephen Dolan)
• [9075]: define to_rev_seq in Set and Map modules. (Sébastien
Briais, review by Gabriel Scherer and Nicolás Ojeda Bär)
• [9561]: Unbox Unix.gettimeofday and Unix.time (Stephen Dolan, review
by David Allsopp)
• [9570]: Provide an Atomic module with a trivial purely-sequential
implementation, to help write code that is compatible with Multicore
OCaml. (Gabriel Scherer, review by Xavier Leroy)
• [10035]: Make sure that flambda respects atomicity in the Atomic
module. (Guillaume Munch-Maccagnoni, review by Gabriel Scherer)
• [9571]: Make at_exit and Printexc.register_printer thread-safe.
(Guillaume Munch-Maccagnoni, review by Gabriel Scherer and Xavier
Leroy)
• [9587]: Arg: new Rest_all spec to get all rest arguments in a list
(this is similar to Rest, but makes it possible to detect when there
are no arguments (an empty list) after the rest marker) (Gabriel
Scherer, review by Nicolás Ojeda Bär and David Allsopp)
• [9655]: Obj: introduce type raw_data and functions raw_field,
set_raw_field to manipulate out-of-heap pointers in no-naked-pointer
mode, and more generally all other data that is not a well-formed
OCaml value (Xavier Leroy, review by Damien Doligez and Gabriel
Scherer)
• [9663]: Extend Printexc API for raw backtrace entries. (Stephen
Dolan, review by Nicolás Ojeda Bär and Gabriel Scherer)
• [9763]: Add function Hashtbl.rebuild to convert from old hash table
formats (that may have been saved to persistent storage) to the
current hash table format. Remove leftover support for the hash
table format and generic hash function that were in use before OCaml
4.00. (Xavier Leroy, review by Nicolás Ojeda Bär)
• [10070]: Fix Float.Array.blit when source and destination arrays
coincide. (Nicolás Ojeda Bär, review by Alain Frisch and Xavier
Leroy)
[9781] <https://github.com/ocaml/ocaml/issues/9781>
[9554] <https://github.com/ocaml/ocaml/issues/9554>
[9075] <https://github.com/ocaml/ocaml/issues/9075>
[9561] <https://github.com/ocaml/ocaml/issues/9561>
[9570] <https://github.com/ocaml/ocaml/issues/9570>
[10035] <https://github.com/ocaml/ocaml/issues/10035>
[9571] <https://github.com/ocaml/ocaml/issues/9571>
[9587] <https://github.com/ocaml/ocaml/issues/9587>
[9655] <https://github.com/ocaml/ocaml/issues/9655>
[9663] <https://github.com/ocaml/ocaml/issues/9663>
[9763] <https://github.com/ocaml/ocaml/issues/9763>
[10070] <https://github.com/ocaml/ocaml/issues/10070>
Other libraries:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [8796]: On Windows, make Unix.utimes use FILE_FLAG_BACKUP_SEMANTICS
flag to allow it to work with directories. (Daniil Baturin, review
by Damien Doligez)
• [9593]: Use new flag for non-elevated symbolic links and test for
Developer Mode on Windows (Manuel Hornung, review by David Allsopp
and Nicolás Ojeda Bär)
• *breaking change* [9601]: Return EPERM for EUNKNOWN -1314 in
win32unix (principally affects error handling when Unix.symlink is
unavailable) (David Allsopp, review by Xavier Leroy)
• [9338], [9790]: Dynlink: make sure *_units () functions report
accurate information before the first load. (Daniel Bünzli, review
by Xavier Leroy and Nicolás Ojeda Bär)
• *breaking change* [9757], [9846], [10161]: check proper ownership
when operating over mutexes. Now, unlocking a mutex held by another
thread or not locked at all reliably raises a Sys_error exception.
Before, it was undefined behavior, but the documentation did not say
so. Likewise, locking a mutex already locked by the current thread
reliably raises a Sys_error exception. Before, it could deadlock or
succeed (and do recursive locking), depending on the OS. (Xavier
Leroy, report by Guillaume Munch-Maccagnoni, review by Guillaume
Munch-Maccagnoni, David Allsopp, and Stephen Dolan)
• [9802]: Ensure signals are handled before Unix.kill returns (Stephen
Dolan, review by Jacques-Henri Jourdan)
• [9869], [10073]: Add Unix.SO_REUSEPORT (Yishuai Li, review by Xavier
Leroy, amended by David Allsopp)
• [9906], [9914]: Add Unix._exit as a way to exit the process
immediately, skipping any finalization action (Ivan Gotovchits and
Xavier Leroy, review by Sébastien Hinderer and David Allsopp)
• [9958]: Raise exception in case of error in Unix.setsid. (Nicolás
Ojeda Bär, review by Stephen Dolan)
• [9971], [9973]: Make sure the process can terminate when the last
thread calls Thread.exit. (Xavier Leroy, report by Jacques-Henri
Jourdan, review by David Allsopp and Jacques-Henri Jourdan).
[8796] <https://github.com/ocaml/ocaml/issues/8796>
[9593] <https://github.com/ocaml/ocaml/issues/9593>
[9601] <https://github.com/ocaml/ocaml/issues/9601>
[9338] <https://github.com/ocaml/ocaml/issues/9338>
[9790] <https://github.com/ocaml/ocaml/issues/9790>
[9757] <https://github.com/ocaml/ocaml/issues/9757>
[9846] <https://github.com/ocaml/ocaml/issues/9846>
[10161] <https://github.com/ocaml/ocaml/issues/10161>
[9802] <https://github.com/ocaml/ocaml/issues/9802>
[9869] <https://github.com/ocaml/ocaml/issues/9869>
[10073] <https://github.com/ocaml/ocaml/issues/10073>
[9906] <https://github.com/ocaml/ocaml/issues/9906>
[9914] <https://github.com/ocaml/ocaml/issues/9914>
[9958] <https://github.com/ocaml/ocaml/issues/9958>
[9971] <https://github.com/ocaml/ocaml/issues/9971>
[9973] <https://github.com/ocaml/ocaml/issues/9973>
Tools:
┄┄┄┄┄┄
• [9551]: ocamlobjinfo is now able to display information on .cmxs
shared libraries natively; it no longer requires libbfd to do so
(Nicolás Ojeda Bär, review by Daniel Bünzli, Gabriel Scherer, Anil
Madhavapeddy, and Xavier Leroy)
• *breaking change* [9299], [9795]: ocamldep: do not process files
during cli parsing. Fixes various broken cli behaviours. (Daniel
Bünzli, review by Nicolás Ojeda Bär)
[9551] <https://github.com/ocaml/ocaml/issues/9551>
[9299] <https://github.com/ocaml/ocaml/issues/9299>
[9795] <https://github.com/ocaml/ocaml/issues/9795>
Debugging and profiling:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9606], [9635], [9637]: fix 4.10 performance regression in the
debugger (behaviors quadratic in the size of the debugged program)
(Xavier Leroy, report by Jacques Garrigue and Virgile Prevosto,
review by David Allsopp and Jacques-Henri Jourdan)
• [9948]: Remove Spacetime. (Nicolás Ojeda Bär, review by Stephen
Dolan and Xavier Leroy)
[9606] <https://github.com/ocaml/ocaml/issues/9606>
[9635] <https://github.com/ocaml/ocaml/issues/9635>
[9637] <https://github.com/ocaml/ocaml/issues/9637>
[9948] <https://github.com/ocaml/ocaml/issues/9948>
Manual and documentation:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [10142], [10154]: improved rendering and latex code for toplevel
code examples. (Florian Angeletti, report by John Whitington,
review by Gabriel Scherer)
• [9745]: Manual: Standard Library labeled and unlabeled documentation
unified (John Whitington, review by Nicolás Ojeda Bär, David
Allsopp, Thomas Refis, and Florian Angeletti)
• [9877]: manual, warn that multi-index indexing operators should be
defined in conjunction of single-index ones. (Florian Angeletti,
review by Hezekiah M. Carty, Gabriel Scherer, and Marcello Seri)
• [10233]: Document `-save-ir-after scheduling' and update
`-stop-after' options. (Greta Yorsh, review by Gabriel Scherer and
Florian Angeletti)
[10142] <https://github.com/ocaml/ocaml/issues/10142>
[10154] <https://github.com/ocaml/ocaml/issues/10154>
[9745] <https://github.com/ocaml/ocaml/issues/9745>
[9877] <https://github.com/ocaml/ocaml/issues/9877>
[10233] <https://github.com/ocaml/ocaml/issues/10233>
Compiler user-interface and warnings:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [1931]: rely on levels to enforce principality in patterns (Thomas
Refis and Leo White, review by Jacques Garrigue)
• *breaking change* [9011]: Do not create .a/.lib files when creating
a .cmxa with no modules. macOS ar doesn't support creating empty .a
files ([1094]) and MSVC doesn't permit .lib files to contain no
objects. When linking with a .cmxa containing no modules, it is now
not an error for there to be no .a/.lib file. (David Allsopp,
review by Xavier Leroy)
• [9560]: Report partial application warnings on type errors in
applications. (Stephen Dolan, report and testcase by whitequark,
review by Gabriel Scherer and Thomas Refis)
• [9583]: when bytecode linking fails due to an unavailable module,
the module that requires it is now included in the error message.
(Nicolás Ojeda Bär, review by Vincent Laviron)
• [9615]: Attach package type attributes to core_type. When parsing
constraints on a first class module, attributes found after the
module type were parsed but ignored. Now they are attached to the
corresponding core_type. (Etienne Millon, review by Thomas Refis)
• [6633], [9673]: Add hint when a module is used instead of a module
type or when a module type is used instead of a module or when a
class type is used instead of a class. (Xavier Van de Woestyne,
report by whitequark, review by Florian Angeletti and Gabriel
Scherer)
• [9754]: allow [@tailcall true] (equivalent to [@tailcall]) and
[@tailcall false] (warns if on a tailcall) (Gabriel Scherer, review
by Nicolás Ojeda Bär)
• [9751]: Add warning 68. Pattern-matching depending on mutable state
prevents the remaining arguments from being uncurried. (Hugo
Heuzard, review by Leo White)
• [9783]: Widen warning 16 (Unerasable optional argument) to more
cases. (Leo White, review by Florian Angeletti)
• [10008]: Improve error message for aliases to the current
compilation unit. (Leo White, review by Gabriel Scherer)
• [10046]: Link all DLLs with -static-libgcc on mingw32 to prevent
dependency on libgcc_s_sjlj-1.dll with mingw-w64 runtime 8.0.0
(previously this was only needed for dllunix.dll). (David Allsopp,
report by Andreas Hauptmann, review by Xavier Leroy)
• [9634]: Allow initial and repeated commas in `OCAMLRUNPARAM'.
(Nicolás Ojeda Bär, review by Gabriel Scherer)
[1931] <https://github.com/ocaml/ocaml/issues/1931>
[9011] <https://github.com/ocaml/ocaml/issues/9011>
[1094] <https://github.com/ocaml/ocaml/issues/1094>
[9560] <https://github.com/ocaml/ocaml/issues/9560>
[9583] <https://github.com/ocaml/ocaml/issues/9583>
[9615] <https://github.com/ocaml/ocaml/issues/9615>
[6633] <https://github.com/ocaml/ocaml/issues/6633>
[9673] <https://github.com/ocaml/ocaml/issues/9673>
[9754] <https://github.com/ocaml/ocaml/issues/9754>
[9751] <https://github.com/ocaml/ocaml/issues/9751>
[9783] <https://github.com/ocaml/ocaml/issues/9783>
[10008] <https://github.com/ocaml/ocaml/issues/10008>
[10046] <https://github.com/ocaml/ocaml/issues/10046>
[9634] <https://github.com/ocaml/ocaml/issues/9634>
Internal/compiler-libs changes:
┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
• [8987]: Make some locations more accurate (Thomas Refis, review by
Gabriel Scherer)
• [9216]: add Lambda.duplicate which refreshes bound identifiers
(Gabriel Scherer, review by Pierre Chambart and Vincent Laviron)
• [9376]: Remove spurious Ptop_defs from #use (Leo White, review by
Damien Doligez)
• [9604]: refactoring of the ocamltest codebase. (Nicolás Ojeda Bär,
review by Gabriel Scherer and Sébastien Hinderer)
• [9498], [9511]: make the pattern-matching analyzer more robust to
or-pattern explosion, by stopping after the first counter-example to
exhaustivity (Gabriel Scherer, review by Luc Maranget, Thomas Refis
and Florian Angeletti, report by Alex Fedoseev through Hongbo Zhang)
• [9514]: optimize pattern-matching exhaustivity analysis in the
single-row case (Gabriel Scherer, review by Stephen DOlan)
• [9442]: refactor the implementation of the [@tailcall] attribute to
allow for a structured attribute payload (Gabriel Scherer, review by
Vladimir Keleshev and Nicolás Ojeda Bär)
• [9688]: Expose the main entrypoint in compilerlibs (Stephen Dolan,
review by Nicolás Ojeda Bär, Greta Yorsh and David Allsopp)
• [9715]: recheck scope escapes after normalising paths (Matthew Ryan,
review by Gabriel Scherer and Thomas Refis)
• [9778]: Fix printing for bindings where polymorphic type annotations
and attributes are present. (Matthew Ryan, review by Nicolás Ojeda
Bär)
• [9797], [9849]: Eliminate the routine use of external commands in
ocamltest. ocamltest no longer calls the mkdir, rm and ln external
commands (at present, the only external command ocamltest uses is
diff). (David Allsopp, review by Nicolás Ojeda Bär, Sébastien
Hinderer and Xavier Leroy)
• [9801]: Don't ignore EOL-at-EOF differences in ocamltest. (David
Allsopp, review by Damien Doligez, much input and thought from
Daniel Bünzli, Damien Doligez, Sébastien Hinderer, and Xavier Leroy)
• [9889]: more caching when printing types with -short-path. (Florian
Angeletti, review by Gabriel Scherer)
• [9591]: fix pprint of polyvariants that start with a core_type,
closed, not low (Chet Murthy, review by Florian Angeletti)
• [9590]: fix pprint of extension constructors (and exceptions) that
rebind (Chet Murthy, review by octachron@)
• [9963]: Centralized tracking of frontend's global state (Frédéric
Bour and Thomas Refis, review by Gabriel Scherer)
• [9631]: Named text sections for caml_system__code_begin/end symbols
(Greta Yorsh, review by Frédéric Bour)
• [9896]: Share the strings representing scopes, fixing some
regression on .cmo/.cma sizes (Alain Frisch and Xavier Clerc, review
by Gabriel Scherer)
[8987] <https://github.com/ocaml/ocaml/issues/8987>
[9216] <https://github.com/ocaml/ocaml/issues/9216>
[9376] <https://github.com/ocaml/ocaml/issues/9376>
[9604] <https://github.com/ocaml/ocaml/issues/9604>
[9498] <https://github.com/ocaml/ocaml/issues/9498>
[9511] <https://github.com/ocaml/ocaml/issues/9511>
[9514] <https://github.com/ocaml/ocaml/issues/9514>
[9442] <https://github.com/ocaml/ocaml/issues/9442>
[9688] <https://github.com/ocaml/ocaml/issues/9688>
[9715] <https://github.com/ocaml/ocaml/issues/9715>
[9778] <https://github.com/ocaml/ocaml/issues/9778>
[9797] <https://github.com/ocaml/ocaml/issues/9797>
[9849] <https://github.com/ocaml/ocaml/issues/9849>
[9801] <https://github.com/ocaml/ocaml/issues/9801>
[9889] <https://github.com/ocaml/ocaml/issues/9889>
[9591] <https://github.com/ocaml/ocaml/issues/9591>
[9590] <https://github.com/ocaml/ocaml/issues/9590>
[9963] <https://github.com/ocaml/ocaml/issues/9963>
[9631] <https://github.com/ocaml/ocaml/issues/9631>
[9896] <https://github.com/ocaml/ocaml/issues/9896>
Build system:
┄┄┄┄┄┄┄┄┄┄┄┄┄
• [9332], [9518], [9529]: Cease storing C dependencies in the
codebase. C dependencies are generated on-the-fly in development
mode. For incremental compilation, the MSVC ports require GCC to be
present. (David Allsopp, review by Sébastien Hinderer, YAML-fu by
Stephen Dolan)
• [7121], [9558]: Always have the autoconf-discovered ld in PACKLD,
with extra flags in new variable PACKLD_FLAGS. For
cross-compilation, this means the triplet-prefixed version will
always be used. (David Allsopp, report by Adrian Nader, review by
Sébastien Hinderer)
• [9527]: stop including configuration when running 'clean' rules to
avoid C dependency recomputation. (Gabriel Scherer, review by David
Allsopp)
• [9804]: Build C stubs of libraries in otherlibs/ with debug info.
(Stephen Dolan, review by Sébastien Hinderer and David Allsopp)
• [9938], [9939]: Define __USE_MINGW_ANSI_STDIO=0 for the mingw-w64
ports to prevent their C99-compliant snprintf conflicting with ours.
(David Allsopp, report by Michael Soegtrop, review by Xavier Leroy)
• [9895], [9523]: Avoid conflict with C++20 by not installing VERSION
to the OCaml Standard Library directory. (Bernhard Schommer, review
by David Allsopp)
• [10044]: Always report the detected ARCH, MODEL and SYSTEM, even for
bytecode- only builds (fixes a "configuration regression" from 4.08
for the Windows builds) (David Allsopp, review by Xavier Leroy)
• [10071]: Fix bug in tests/misc/weaklifetime.ml that was reported in
[10055] (Damien Doligez and Gabriel Scherer, report by David
Allsopp)
[9332] <https://github.com/ocaml/ocaml/issues/9332>
[9518] <https://github.com/ocaml/ocaml/issues/9518>
[9529] <https://github.com/ocaml/ocaml/issues/9529>
[7121] <https://github.com/ocaml/ocaml/issues/7121>
[9558] <https://github.com/ocaml/ocaml/issues/9558>
[9527] <https://github.com/ocaml/ocaml/issues/9527>
[9804] <https://github.com/ocaml/ocaml/issues/9804>
[9938] <https://github.com/ocaml/ocaml/issues/9938>
[9939] <https://github.com/ocaml/ocaml/issues/9939>
[9895] <https://github.com/ocaml/ocaml/issues/9895>
[9523] <https://github.com/ocaml/ocaml/issues/9523>
[10044] <https://github.com/ocaml/ocaml/issues/10044>
[10071] <https://github.com/ocaml/ocaml/issues/10071>
[10055] <https://github.com/ocaml/ocaml/issues/10055>
Bug fixes:
┄┄┄┄┄┄┄┄┄┄
• [7538], [9669]: Check for misplaced attributes on module aliases
(Leo White, report by Thomas Leonard, review by Florian Angeletti)
• [7813], [9955]: make sure the major GC cycle doesn't get stuck in
Idle state (Damien Doligez, report by Anders Fugmann, review by
Jacques-Henri Jourdan)
• [7902], [9556]: Type-checker infers recursive type, even though
-rectypes is off. (Jacques Garrigue, report by Francois Pottier,
review by Leo White)
• [8746]: Hashtbl: Restore ongoing traversal status after
filter_map_inplace (Mehdi Bouaziz, review by Alain Frisch)
• [8747], [9709]: incorrect principality warning on functional updates
of records (Jacques Garrigue, report and review by Thomas Refis)
• *breaking change* [8907], [9878]: `Typemod.normalize_signature' uses
wrong environment (Jacques Garrigue, report and review by Leo White)
• [9421], [9427]: fix printing of `(::)' in ocamldoc (Florian
Angeletti, report by Yawar Amin, review by Damien Doligez)
• [9440]: for a type extension constructor with parameterised
arguments, REPL displayed <poly> for each as opposed to the concrete
values used. (Christian Quinn, review by Gabriel Scherer)
• [9433]: Fix package constraints for module aliases (Leo White,
review by Jacques Garrigue)
• [9469]: Better backtraces for lazy values (Leo White, review by
Nicolás Ojeda Bär)
• [9521], [9522]: correctly fail when comparing functions with Closure
and Infix tags. (Gabriel Scherer and Jeremy Yallop and Xavier
Leroy, report by Twitter user @st_toHKR through Jun Furuse)
• [9611]: maintain order of load path entries in various situations:
when passing them to system linker, ppx contexts, etc. (Nicolás
Ojeda Bär, review by Jérémie Dimino and Gabriel Scherer)
• [9633]: ocamltest: fix a bug when certain variables set in test
scripts would be ignored (eg `ocamlrunparam'). (Nicolás Ojeda Bär,
review by Sébastien Hinderer)
• [9681], [9690], [9693]: small runtime changes for the new closure
representation ([9619]) (Xavier Leroy, Sadiq Jaffer, Gabriel
Scherer, review by Xavier Leroy and Jacques-Henri Jourdan)
• [9739], [9747]: Avoid calling type variables, types that are not
variables in recursive occurrence error messages (for instance,
"Type variable int occurs inside int list") (Florian Angeletti,
report by Stephen Dolan, review by Armaël Guéneau)
• [9759], [9767]: Spurious GADT ambiguity without -principal (Jacques
Garrigue, report by Thomas Refis, review by Thomas Refis and Gabriel
Scherer)
• [9799], [9803]: make pat_env point to the correct environment
(Thomas Refis, report by Alex Fedoseev, review by Gabriel Scherer)
• [9825], [9830]: the C global variable caml_fl_merge and the C
function caml_spacetime_my_profinfo (bytecode version) were declared
and defined with different types. This is undefined behavior and
cancause link-time errors with link-time optimization (LTO).
(Xavier Leroy, report by Richard Jones, review by Nicolás Ojeda Bär)
• [9753]: fix build for Android (Eduardo Rafael, review by Xavier
Leroy)
• [9848], [9855]: Fix double free of bytecode in toplevel (Stephen
Dolan, report by Sampsa Kiiskinen, review by Gabriel Scherer)
• [9858], [9861]: Compiler fails with Ctype.Nondep_cannot_erase
exception (Thomas Refis, report by Philippe Veber, review by Florian
Angeletti)
• [9860]: wrong range constraint for subtract immediate on zSystems /
s390x (Xavier Leroy, review by Stephen Dolan)
• [9868], [9872], [9892]: bugs in {in,out}_channel_length and seek_in
for files opened in text mode under Windows (Xavier Leroy, report by
Alain Frisch, review by Nicolás Ojeda Bär and Alain Frisch)
• [9925]: Correct passing -fdebug-prefix-map to flexlink on Cygwin by
prefixing it with -link. (David Allsopp, review by Xavier Leroy)
• [9927]: Restore Cygwin64 support. (David Allsopp, review by Xavier
Leroy)
• [9940]: Fix unboxing of allocated constants from other compilation
units (Vincent Laviron, report by Stephen Dolan, review by Xavier
Leroy and Stephen Dolan)
• [9991]: Fix reproducibility for `-no-alias-deps' (Leo White, review
by Gabriel Scherer and Florian Angeletti)
• [9998]: Use Sys.opaque_identity in CamlinternalLazy.force This
removes extra warning 59 messages when compiling afl-instrumented
code with flambda -O3. (Vincent Laviron, report by Louis Gesbert,
review by Gabriel Scherer and Pierre Chambart)
• [9999]: fix -dsource printing of the pattern `(`A as x | (`B as
x))'. (Gabriel Scherer, report by Anton Bachin, review by Florian
Angeletti)
• [9970], [10010]: fix the declaration scope of extensible-datatype
constructors. A regression that dates back to 4.08 makes
extensible-datatype constructors with inline records very fragile,
for example:
┌────
│ type 'a t += X of {x : 'a}
└────
(Gabriel Scherer, review by Thomas Refis and Leo White, report by
Nicolás Ojeda Bär)
• [10048]: Fix bug with generalized local opens. (Leo White, review
by Thomas Refis)
• [10106], [10112]: some expected-type explanations were forgotten
after some let-bindings (Gabriel Scherer, review by Thomas Refis and
Florian Angeletti, report by Daniil Baturin)
[7538] <https://github.com/ocaml/ocaml/issues/7538>
[9669] <https://github.com/ocaml/ocaml/issues/9669>
[7813] <https://github.com/ocaml/ocaml/issues/7813>
[9955] <https://github.com/ocaml/ocaml/issues/9955>
[7902] <https://github.com/ocaml/ocaml/issues/7902>
[9556] <https://github.com/ocaml/ocaml/issues/9556>
[8746] <https://github.com/ocaml/ocaml/issues/8746>
[8747] <https://github.com/ocaml/ocaml/issues/8747>
[9709] <https://github.com/ocaml/ocaml/issues/9709>
[8907] <https://github.com/ocaml/ocaml/issues/8907>
[9878] <https://github.com/ocaml/ocaml/issues/9878>
[9421] <https://github.com/ocaml/ocaml/issues/9421>
[9427] <https://github.com/ocaml/ocaml/issues/9427>
[9440] <https://github.com/ocaml/ocaml/issues/9440>
[9433] <https://github.com/ocaml/ocaml/issues/9433>
[9469] <https://github.com/ocaml/ocaml/issues/9469>
[9521] <https://github.com/ocaml/ocaml/issues/9521>
[9522] <https://github.com/ocaml/ocaml/issues/9522>
[9611] <https://github.com/ocaml/ocaml/issues/9611>
[9633] <https://github.com/ocaml/ocaml/issues/9633>
[9681] <https://github.com/ocaml/ocaml/issues/9681>
[9690] <https://github.com/ocaml/ocaml/issues/9690>
[9693] <https://github.com/ocaml/ocaml/issues/9693>
[9619] <https://github.com/ocaml/ocaml/issues/9619>
[9739] <https://github.com/ocaml/ocaml/issues/9739>
[9747] <https://github.com/ocaml/ocaml/issues/9747>
[9759] <https://github.com/ocaml/ocaml/issues/9759>
[9767] <https://github.com/ocaml/ocaml/issues/9767>
[9799] <https://github.com/ocaml/ocaml/issues/9799>
[9803] <https://github.com/ocaml/ocaml/issues/9803>
[9825] <https://github.com/ocaml/ocaml/issues/9825>
[9830] <https://github.com/ocaml/ocaml/issues/9830>
[9753] <https://github.com/ocaml/ocaml/issues/9753>
[9848] <https://github.com/ocaml/ocaml/issues/9848>
[9855] <https://github.com/ocaml/ocaml/issues/9855>
[9858] <https://github.com/ocaml/ocaml/issues/9858>
[9861] <https://github.com/ocaml/ocaml/issues/9861>
[9860] <https://github.com/ocaml/ocaml/issues/9860>
[9868] <https://github.com/ocaml/ocaml/issues/9868>
[9872] <https://github.com/ocaml/ocaml/issues/9872>
[9892] <https://github.com/ocaml/ocaml/issues/9892>
[9925] <https://github.com/ocaml/ocaml/issues/9925>
[9927] <https://github.com/ocaml/ocaml/issues/9927>
[9940] <https://github.com/ocaml/ocaml/issues/9940>
[9991] <https://github.com/ocaml/ocaml/issues/9991>
[9998] <https://github.com/ocaml/ocaml/issues/9998>
[9999] <https://github.com/ocaml/ocaml/issues/9999>
[9970] <https://github.com/ocaml/ocaml/issues/9970>
[10010] <https://github.com/ocaml/ocaml/issues/10010>
[10048] <https://github.com/ocaml/ocaml/issues/10048>
[10106] <https://github.com/ocaml/ocaml/issues/10106>
[10112] <https://github.com/ocaml/ocaml/issues/10112>
Anil Madhavapeddy then said
───────────────────────────
And the [4.12.0 manual is now live] on the website. Thank for you the
excellent improvement, @sanette!
[4.12.0 manual is now live] <https://www.ocaml.org/manual/>
latest batteries release: v3.3.0
════════════════════════════════
Archive:
<https://discuss.ocaml.org/t/ann-latest-batteries-release-v3-3-0/7389/1>
UnixJunkie announced
────────────────────
The batteries maintainers are pleased to announce the latest minor
release of OCaml batteries-included: v3.3.0. Batteries is an
open-source, community-maintained, extended standard library for
OCaml. The latest version is available in opam.
Many thanks to all the contributors for this release!
The change log follows:
v3.3.0 (minor release)
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• Several fixes for OCaml-4.12 #994, #992, (kit-ty-kate)
• Support for ocaml-multicore in the Gc module #991 (kit-ty-kate,
review by Gabriel Scherer)
• Significant work preparing switch to dune #1025, #1024, #1023,
#1022, #1021, #1020, #1019, #1017 (Gabriel Scherer, review by
Francois Berenger)
• Remove `-rectypes' from BatFingerTree and simpler implementation
#1012 (Gabriel Scherer)
• new BatEither module; available in all OCaml versions supported by
batteries #1027 The implementation comes from the stdlib and is due
to Gabriel Scherer. (Francois Berenger, review by Gabriel Scherer)
• BatList.partition_map: `('a -> ('b, 'c) BatEither.t) -> 'a list ->
'b list * 'c list' #1028 (Francois Berenger, review by Gabriel
Scherer)
• BatSet: added several missing methods for compatibility with stdlib.
The implementation of filter, map and filter_map was adapted
from stdlib, authors of the original implementation are Xavier
Leroy, Albin Coquereau and Gabriel Scherer #1006, #1008 (Jakob
Krainz, review by Gabriel Scherer)
• BatSeq: compatibility with stdlib.Seq #1005, #1007 (Jakob Krainz,
review by Gabriel Scherer)
• BatMap, BatSplay: find_first, find_first_opt, find_last,
find_last_opt, to_rev_seq For compatibility with the stdlib.
The implementation in BatMap was adapted from stdlib; authors
of the original implementation are Albin Coquereau and Gabriel
de Perthuis. #1000, #1031 (Jakob Krainz, review by Gabriel
Scherer)
• BatArray.remove_at: `int -> 'a array -> 'a array' #996 For
compatibility with BatList (Francois Berenger, review by Cedric
Cellier)
• BatDynArray: several new functions BatDynArray now exposes almost
the same functionalities as BatArray #872 (andrepd, review by
Florent Monnier and Francois Berenger)
• BatDynArray: uniformization of exceptions and more documentation
#988 (Florent Monnier, review by Francois Berenger)
• BatDynArray: user input checks in left, right, tail #987 (Florent
Monnier, review by Francois Berenger)
• Fix stack overflow on Int32/64.pow with negative exponent (issue
#989) #990 (Cedric Cellier, review by Francois Berenger)
• BatList.unfold_exn is an alias for unfold_exc. BatRefList.find_exn
is an alias for find_exc. #978 (Cedric Cellier, review by Francois
Berenger)
Other OCaml News
════════════════
From the ocamlcore planet blog
──────────────────────────────
Here are links from many OCaml blogs aggregated at [OCaml Planet].
• [Coq Platform 2021.02.0 is out]
• [Coq 8.13.1 is out]
• [The Burali-Forti argument in HoTT/UF]
• [Partenering for more diversity in Tech]
• [opam 2.0.8 release]
• [ ReScript 9.0]
• [opam 2.0.8 release]
• [opam 2.1.0~beta4 released]
• [Synthetic mathematics with an excursion into computability theory]
• [2020 at OCamlPro]
[OCaml Planet] <http://ocaml.org/community/planet/>
[Coq Platform 2021.02.0 is out]
<https://coq.inria.fr/news/coq-platform-2021.02.0-is-out.html>
[Coq 8.13.1 is out] <https://coq.inria.fr/news/coq-8-13-1-is-out.html>
[The Burali-Forti argument in HoTT/UF]
<http://math.andrej.com/2021/02/22/burali-forti-in-hott-uf/>
[Partenering for more diversity in Tech]
<https://tarides.com/blog/2021-02-15-partenering-for-more-diversity-in-tech>
[opam 2.0.8 release]
<https://www.ocamlpro.com/2021/02/09/opam-2-0-8-release/>
[ ReScript 9.0] <https://rescript-lang.org/blog/release-9-0>
[opam 2.0.8 release] <https://opam.ocaml.org/blog/opam-2-0-8/>
[opam 2.1.0~beta4 released]
<https://opam.ocaml.org/blog/opam-2-1-0-beta4/>
[Synthetic mathematics with an excursion into computability theory]
<http://math.andrej.com/2021/02/03/synthetic-mathematics-with-excursion-to-computability/>
[2020 at OCamlPro]
<https://www.ocamlpro.com/2021/02/02/2020-at-ocamlpro/>
Old CWN
═══════
If you happen to miss a CWN, you can [send me a message] and I'll mail
it to you, or go take a look at [the archive] or the [RSS feed of the
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If you also wish to receive it every week by mail, you may subscribe
[online].
[Alan Schmitt]
[send me a message] <mailto:alan.schmitt at polytechnique.org>
[the archive] <https://alan.petitepomme.net/cwn/>
[RSS feed of the archives] <https://alan.petitepomme.net/cwn/cwn.rss>
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