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Working version
---------------
(Changes that can break existing programs are marked with a "*")
### Language features:
### Type system:
### Standard library:
- MPR#7795, GPR#1782: Fix off-by-one error in Weak.create
(KC Sivaramakrishnan)
- GPR#1731: Format, use raise_notrace to preserve backtraces
(Frédéric Bour, report by Jules Villard, review by Gabriel Scherer)
### Other libraries:
### Compiler user-interface and warnings:
- MPR#7116, GPR#1430: new -config-var option
to get the value of a single configuration variable in scripts
(Gabriel Scherer, review by Sébastien Hinderer and David Allsopp,
request by Adrien Nader)
- GPR#1733: change the perspective of the unexpected existential error message
(Florian Angeletti, review by Gabriel Scherer and Jeremy Yallop)
- GPR#1720: Improve error reporting for missing 'rec' in let-bindings
(Arthur Charguéraud and Armaël Guéneau, with help and advice
from Gabriel Scherer, Frédéric Bour, Xavier Clerc and Leo White)
### Code generation and optimizations:
### Runtime system:
### Tools:
- GPR#1711: the new 'open' flag in OCAMLRUNPARAM takes a comma-separated list of
modules to open as if they had been passed via the command line -open flag.
(Nicolás Ojeda Bär, review by Mark Shinwell)
### Manual and documentation:
### Compiler distribution build system:
- GPR#1776: add -no-install-bytecode-programs and related configure options to
control (non-)installation of ".byte" executables
(Mark Shinwell, review by Sébastien Hinderer and Gabriel Scherer)
- GPR#1777: add -no-install-source-artifacts and related configure options to
control installation of .cmt, .cmti, .mli and .ml files
(Mark Shinwell, review by Nicolas Ojeda Bar and Sébastien Hinderer)
### Internal/compiler-libs changes:
- GPR#1745: do not generalize the type of every sub-pattern, only of variables
(Thomas Refis, review by Leo White)
- GPR#1746: remove unreachable error variant: Make_seltype_nongen
(Florian Angeletti, review by Gabriel Radanne)
- GPR#1747: type_cases: always propagate
(Thomas Refis, review by Jacques Garrigue)
### Bug fixes:
- GPR#1623: Segfault on Windows 64 bits when expanding wildcards in arguments.
(Marc Lasson, review by David Allsopp, Alain Frisch, Sébastien Hinderer,
Xavier Leroy, Nicolas Ojeda Bar)
- MPR#7769, GPR#1714: calls to Stream.junk could, under some conditions, be
ignored when used on streams based on input channels.
(Nicolás Ojeda Bär, report by Michael Perin, review by Gabriel Scherer)
- GPR#1719: fix Pervasives.LargeFile functions under Windows
(Alain Frisch)
- GPR#1739: ensure ocamltest waits for child processes to terminate on Windows
(David Allsopp, review by Sébastien Hinderer)
OCaml 4.07
----------
(Changes that can break existing programs are marked with a "*")
### Language features:
- MPR#6023, GPR#1648: Allow type-based selection of GADT constructors
(Thomas Refis and Leo White, review by Jacques Garrigue and Gabriel Scherer)
- GPR#1546: Allow empty variants
(Runhang Li, review by Gabriel Radanne and Jacques Garrigue)
- GRP#1705: Allow @@attributes on exceptions
(Hugo Heuzard, review by Gabriel Radanne)
### Type system:
- MPR#7767, GPR#1712: restore legacy treatment of partially-applied
labeled functions in 'let rec' bindings.
(Jeremy Yallop, report by Ivan Gotovchits, review by Gabriel Scherer)
- MPR#7611, GPR#1491: reject the use of generative functors as applicative
(Valentin Gatien-Baron)
- MPR#7706, GPR#1565: in recursive value declarations, track
static size of locally-defined variables
(Gabriel Scherer, review by Jeremy Yallop and Leo White, report by Leo White)
- MPR#7717, GPR#1593: in recursive value declarations, don't treat
unboxed constructor size as statically known
(Jeremy Yallop, report by Pierre Chambart, review by Gabriel Scherer)
- GPR#1469: Use the information from [@@immediate] annotations when
computing whether a type can be [@@unboxed]
(Damien Doligez, report by Stephan Muenzel, review by Alain Frisch)
- GPR#1516: Allow float array construction in recursive bindings
when configured with -no-flat-float-array
(Jeremy Yallop, report by Gabriel Scherer)
- GPR#1468: Do not enrich type_decls with incoherent manifests
(Thomas Refis and Leo White, review by Jacques Garrigue)
- GPR#1583: propagate refined ty_arg to Parmatch checks
(Thomas Refis, review by Jacques Garrigue)
- GPR#1513: Allow compilation units to shadow sub-modules of Pervasives.
For instance users can now use a largeFile.ml file in their project.
(Jérémie Dimino, review by Nicolas Ojeda Bar, Alain Frisch and Gabriel Radanne)
- GPR#1609: Changes to ambivalence scope tracking
(Thomas Refis and Leo White, review by Jacques Garrigue)
- GPR#1628: Treat reraise and raise_notrace as nonexpansive.
(Leo White, review by Alain Frisch)
* GPR#1652, MPR#7787, GPR#1743: Don't remove module aliases in `module type of`
and `with module`.
The old behaviour can be obtained using the `[@remove_aliases]` attribute.
(Leo White and Thomas Refis, review by Jacques Garrigue)
### Standard library:
- MPR#4170, GPR#1674: add the constant `Float.pi`.
(Christophe Troestler, review by Damien Doligez)
- MPR#7690, GPR#1528: fix the float_of_string function for hexadecimal floats
with very large values of the exponent.
(Olivier Andrieu)
- GPR#1002: add a new `Seq` module defining a list-of-thunks style iterator.
Also add `{to,of}_seq` to several standard modules.
(Simon Cruanes, review by Alain Frisch and François Bobot)
- GPR#1637: String.escaped is faster does and not allocate when called with a
string that does not contain any characters needing to be escaped.
(Alain Frisch, review by Xavier Leroy and Gabriel Scherer)
- GPR#1638: add Float module.
(Nicolás Ojeda Bär, review by Alain Frisch and Jeremy Yallop)
- GPR#1697: Tune [List.init] tailrec threshold so that it does not stack overflow
when compiled with the Js_of_ocaml backend.
(Hugo Heuzard, reviewed by Gabriel Scherer)
- MPR#6139, GPR#1685: Move the Bigarray module to the standard library. Keep the
bigarray library as on overlay adding the deprecated map_file functions
(Jérémie Dimino, review by Mark Shinwell)
### Other libraries:
- MPR#7745, GPR#1629: Graphics.open_graph displays the correct window title on
Windows again (fault introduced by 4.06 Unicode changes).
(David Allsopp)
* GPR#1406: Unix.isatty now returns true in the native Windows ports when
passed a file descriptor connected to a Cygwin PTY. In particular, compiler
colors for the native Windows ports now work under Cygwin/MSYS2.
(Nicolás Ojeda Bär, review by Gabriel Scherer, David Allsopp, Xavier Leroy)
- GPR#1451: [getpwuid], [getgrgid], [getpwnam], [getgrnam] now raise Unix error
instead of returning [Not_found] when interrupted by a signal.
(Arseniy Alekseyev, review by Mark Shinwell and Xavier Leroy)
- GPR#1477: raw_spacetime_lib can now be used in bytecode.
(Nicolás Ojeda Bär, review by Mark Shinwell)
- GPR#1533: (a) The implementation of Thread.yield for system thread
now uses nanosleep(1) for enabling better preemption.
(b) Thread.delay is now an alias for Unix.sleepf.
### Compiler user-interface and warnings:
- MPR#7663, GPR#1694: print the whole cycle and add a reference to the manual in
the unsafe recursive module evaluation error message.
(Florian Angeletti, report by Matej Košík, review by Gabriel Scherer)
- GPR#1166: In OCAMLPARAM, an alternative separator can be specified as
first character (instead of comma) in the set ":|; ,"
(Fabrice Le Fessant)
- GPR#1358: Fix usage warnings with no mli file
(Leo White, review by Alain Frisch)
- GPR#1428: give a non dummy location for warning 49 (no cmi found)
(Valentin Gatien-Baron)
- GPR#1491: Improve error reporting for ill-typed applicative functor
types, F(M).t.
(Valentin Gatien-Baron, review by Florian Angeletti and Gabriel Radanne)
- GPR#1496: Refactor the code printing explanation for unification type errors,
in order to avoid duplicating pattern matches
(Armaël Guéneau, review by Florian Angeletti and Gabriel Scherer)
- GPR#1505: Add specific error messages for unification errors involving
functions of type "unit -> _"
(Arthur Charguéraud and Armaël Guéneau, with help from Leo White, review by
Florian Angeletti and Gabriel Radanne)
- GPR#1510: Add specific explanation for unification errors caused by type
constraints propagated by keywords (such as if, while, for...)
(Armaël Guéneau and Gabriel Scherer, original design by Arthur Charguéraud,
review by Frédéric Bour, Gabriel Radanne and Alain Frisch)
- GPR#1515: honor the BUILD_PATH_PREFIX_MAP environment variable
to enable reproducible builds
(Gabriel Scherer, with help from Ximin Luo, review by Damien Doligez)
- GPR#1534: Extend the warning printed when (*) is used, adding a hint to
suggest using ( * ) instead
(Armaël Guéneau, with help and review from Florian Angeletti and Gabriel
Scherer)
- GPR#1552, GPR#1577: do not warn about ambiguous variables in guards
(warning 57) when the ambiguous values have been filtered by
a previous clause
(Gabriel Scherer and Thomas Refis, review by Luc Maranget)
- GPR#1554: warnings 52 and 57: fix reference to manual detailed explanation
(Florian Angeletti, review by Thomas Refis and Gabriel Scherer)
- GPR#1618: add the -dno-unique-ids and -dunique-ids compiler flags
(Sébastien Hinderer, review by Leo White and Damien Doligez)
- GPR#1649 change compilation order of toplevel definitions, so that some warnings
emitted by the bytecode compiler appear more in-order than before.
(Luc Maranget, advice and review by Damien Doligez)
### Code generation and optimizations:
- MPR#7630, GPR#1401: Faster compilation of large modules with Flambda.
(Pierre Chambart, report by Emilio Jesús Gallego Arias,
Pierre-Marie Pédrot and Paul Steckler, review by Gabriel Scherer
and Leo White)
- MPR#7630, GPR#1455: Disable CSE for the initialization function
(Pierre Chambart, report by Emilio Jesús Gallego Arias,
review by Gabriel Scherer and Xavier Leroy)
- GPR#1370: Fix code duplication in Cmmgen
(Vincent Laviron, with help from Pierre Chambart,
reviews by Gabriel Scherer and Luc Maranget)
- GPR#1486: ARM 32-bit port: add support for ARMv8 in 32-bit mode,
a.k.a. AArch32.
For this platform, avoid ITE conditional instruction blocks and use
simpler IT blocks instead
(Xavier Leroy, review by Mark Shinwell)
- GPR#1487: Treat negated float comparisons more directly
(Leo White, review by Xavier Leroy)
- GPR#1606: Simplify the semantics of Lambda.free_variables and Lambda.subst,
including some API changes in bytecomp/lambda.mli
(Pierre Chambart, review by Gabriel Scherer)
- GPR#1613: ensure that set-of-closures are processed first so that other
entries in the let-rec symbol do not get dummy approximations
(Leo White and Xavier Clerc, review by Pierre Chambart)
* GPR#1617: Make string/bytes distinguishable in the bytecode.
(Hugo Heuzard, reviewed by Nicolás Ojeda Bär)
- GPR#1686: Turn off by default flambda invariants checks.
(Pierre Chambart)
- GPR#1707: Add [Closure_origin.t] to trace inlined functions to prevent
infinite loops from repeatedly inlining copies of the same function.
(Fu Yong Quah)
- GPR#1740: make sure startup.o is always linked in when using
"-output-complete-obj". Previously, it was always linked in only on some
platforms, making this option unusable on platforms where it wasn't
(Jérémie Dimino, review by Sébastien Hinderer and Xavier Leroy)
### Runtime system:
- MPR#6411, GPR#1535: don't compile everything with -static-libgcc on mingw32,
only dllbigarray.dll and libbigarray.a. Allows the use of C++ libraries which
raise exceptions.
(David Allsopp)
- MPR#7100, GPR#1476: trigger a minor GC when custom blocks accumulate
in minor heap
(Alain Frisch, report by talex, review by Damien Doligez, Leo White,
Gabriel Scherer)
- GPR#1431: remove ocamlrun dependencies on curses/terminfo/termcap C library
(Xavier Leroy, review by Daniel Bünzli)
- GPR#1478: The Spacetime profiler now works under Windows (but it is not yet
able to collect profiling information from C stubs).
(Nicolás Ojeda Bär, review by Xavier Leroy, Mark Shinwell)
- GPR#1483: fix GC freelist accounting for chunks larger than the maximum block
size.
(David Allsopp and Damien Doligez)
- GPR#1526: install the debug and instrumented runtimes
(lib{caml,asm}run{d,i}.a)
(Gabriel Scherer, reminded by Julia Lawall)
- GPR#1563: simplify implementation of LSRINT and ASRINT
(Max Mouratov, review by Frédéric Bour)
- GPR#1644: remove caml_alloc_float_array from the bytecode primitives list
(it's a native code primitive)
(David Allsopp)
- GPR#1701: fix missing root bug in GPR#1476
(Mark Shinwell)
- GPR#1752: do not alias function arguments to sigprocmask (Anil Madhavapeddy)
- GPR#1754, MPR#7725: improve AFL instrumentation for objects and lazy values
(Stephen Dolan)
- GPR#1753: avoid potential off-by-one overflow in debugger socket path
length (Anil Madhavapeddy)
### Tools:
- MPR#7643, GPR#1377: ocamldep, fix an exponential blowup in presence of nested
structures and signatures (e.g. "include struct … include(struct … end) … end")
(Florian Angeletti, review by Gabriel Scherer, report by Christophe Raffalli)
- MPR#7687, GPR#1653: deprecate -thread option,
which is equivalent to -I +threads.
(Nicolás Ojeda Bär, report by Daniel Bünzli)
- MPR#7710: `ocamldep -sort` should exit with nonzero code in case of
cyclic dependencies
(Xavier Leroy, report by Mantis user baileyparker)
- GPR#1585: optimize output of "ocamllex -ml"
(Alain Frisch, review by Frédéric Bour and Gabriel Scherer)
- GPR#1667: add command-line options -no-propt, -no-version, -no-time,
-no-breakpoint and -topdirs-path to ocamldebug
(Sébastien Hinderer, review by Damien Doligez)
- GPR#1537: boot/ocamldep is no longer included in the source distribution;
boot/ocamlc -depend can be used in its place.
(Nicolás Ojeda Bär, review by Xavier Leroy and Damien Doligez)
- GPR#1695: add the -null-crc command-line option to ocamlobjinfo.
(Sébastien Hinderer, review by David Allsopp and Gabriel Scherer)
- GPR#1710: ocamldoc, improve the 'man' rendering of subscripts and
superscripts.
(Gabriel Scherer)
- GPR#1771: ocamdebug, avoid out of bound access
(Thomas Refis)
### Manual and documentation:
- PR#1757: style the html manual, changing type and layout
(Charles Chamberlain, review by Florian Angeletti, Xavier Leroy,
Gabriel Radanne, Perry E. Metzger, and Gabriel Scherer)
- MPR#7613: minor reword of the "refutation cases" paragraph
(Florian Angeletti, review by Jacques Garrigue)
- PR#7647, GPR#1384: emphasize ocaml.org website and forum in README
(Yawar Amin, review by Gabriel Scherer)
- PR#7698, GPR#1545: improve wording in OCaml manual in several places,
mostly in Chapter 1. This addresses the easier changes suggested in the PR.
(Jim Fehrle, review by Florian Angeletti and David Allsopp)
- GPR#1540: manual, decouple verbatim and toplevel style in code examples
(Florian Angeletti, review by Gabriel Scherer)
- GPR#1556: manual, add a consistency test for manual references inside
the compiler source code.
(Florian Angeletti, review by Gabriel Scherer)
- GPR#1647: manual, subsection on record and variant disambiguation
(Florian Angeletti, review by Alain Frisch and Gabriel Scherer)
- GPR#1702: manual, add a signature mode for code examples
(Florian Angeletti, review by Gabriel Scherer)
- GPR#1741: manual, improve typesetting and legibility in HTML output
(steinuil, review by Gabriel Scherer)
- GPR#1765: manual, ellipsis in code examples
(Florian Angeletti, review and suggestion by Gabriel Scherer)
- GPR#1779: integrate the Bigarray documentation into the main manual.
(Perry E. Metzger, review by Florian Angeletti and Xavier Clerc)
### Compiler distribution build system
- MPR#5219, GPR#1680: use 'install' instead of 'cp' in install scripts
(Gabriel Scherer, review by Sébastien Hinderer)
- MPR#7679: make sure .a files are erased before calling ar rc, otherwise
leftover .a files from an earlier compilation may contain unwanted modules
(Xavier Leroy)
- GPR#1571: do not perform architecture tests on 32-bit platforms, allowing
64-bit back-ends to use 64-bit specific constructs
(Xavier Clerc, review by Damien Doligez)
### Internal/compiler-libs changes:
- MPR#7738, GPR#1624: Asmlink.reset also resets lib_ccobjs/ccopts
(Cedric Cellier, review by Gabriel Scherer)
- GPR#1488, GPR#1560: Refreshing parmatch
(Gabriel Scherer and Thomas Refis, review by Luc Maranget)
- GPR#1502: more command line options for expect tests
(Florian Angeletti, review by Gabriel Scherer)
- GPR#1511: show code at error location in expect-style tests,
using new Location.show_code_at_location function
(Gabriel Scherer and Armaël Guéneau,
review by Valentin Gatien-Baron and Damien Doligez)
- GPR#1519, GPR#1532, GRP#1570: migrate tests to ocamltest
(Sébastien Hinderer, review by Gabriel Scherer, Valentin Gatien-Baron
and Nicolás Ojeda Bär)
- GPR#1520: more robust implementation of Misc.no_overflow_mul
(Max Mouratov, review by Xavier Leroy)
- GPR#1557: Organise and simplify translation of primitives
(Leo White, review by François Bobot and Nicolás Ojeda Bär)
- GPR#1567: register all idents relevant for reraise
(Thomas Refis, review by Alain Frisch and Frédéric Bour)
- GPR#1573: emitcode: merge events after instructions reordering
(Thomas Refis and Leo White, with help from David Allsopp, review by Frédéric
Bour)
- GPR#1586: testsuite: 'make promote' for ocamltest tests
(The new "-promote" option for ocamltest is experimental
and subject to change/removal).
(Gabriel Scherer)
- GPR#1619: expect_test: print all the exceptions, even the unexpected ones
(Thomas Refis, review by Jérémie Dimino)
- GPR#1621: expect_test: make sure to not use the installed stdlib
(Jérémie Dimino, review by Thomas Refis)
- GPR#1627: Reduce cmx sizes by sharing variable names (Flambda only)
(Fuyong Quah, Leo White, review by Xavier Clerc)
- GPR#1646 : add ocamldoc test to ocamltest and
migrate ocamldoc tests to ocamltest
(Florian Angeletti, review by Sébastien Hinderer)
- GPR#1663: refactor flambda specialise/inlining handling
(Leo White and Xavier Clerc, review by Pierre Chambart)
- GPR#1665: reduce the size of cmx files in classic mode by droping the
bodies of functions that will not be inlined
(Fuyong Quah, review by Leo White and Pierre Chambart)
- GPR#1666: reduce the size of cmx files in classic mode by droping the
bodies of functions that cannot be reached from the module block
(Fuyong Quah, review by Leo White and Pierre Chambart)
- GPR#1679 : remove Pbittest from primitives in lambda
(Hugo Heuzard, review by Mark Shinwell)
* GPR#1704: Make Ident.t abstract and immutable.
(Gabriel Radanne, review by Mark Shinwell)
### Bug fixes
- MPR#4499, GPR#1479: Use native Windows API to implement Sys.getenv,
Unix.getenv and Unix.environment under Windows.
(Nicolás Ojeda Bär, report by Alain Frisch, review by David Allsopp, Xavier
Leroy)
- MPR#5250, GPR#1435: on Cygwin, when ocamlrun searches the path
for a bytecode executable file, skip directories and other
non-regular files, like other Unix variants do.
(Xavier Leroy)
- MPR#6394, GPR#1425: fix fatal_error from Parmatch.get_type_path
(Virgile Prevosto, review by David Allsopp, Thomas Refis and Jacques Garrigue)
* MPR#6604, GPR#931: Only allow directives with filename and at the beginning of
the line
(Tadeu Zagallo, report by Roberto Di Cosmo,
review by Hongbo Zhang, David Allsopp, Gabriel Scherer, Xavier Leroy)
- MPR#7138, MPR#7701, GPR#1693: Keep documentation comments
even in empty structures and signatures
(Leo White, Florian Angeletti, report by Anton Bachin)
- MPR#7391, GPR#1620: Do not put a dummy method in object types
(Thomas Refis, review by Jacques Garrigue)
- PR#7660, GPR#1445: Use native Windows API to implement Unix.utimes in order to
avoid unintended shifts of the argument timestamp depending on DST setting.
(Nicolás Ojeda Bär, review by David Allsopp, Xavier Leroy)
- MPR#7668: -principal is broken with polymorphic variants
(Jacques Garrigue, report by Jun Furuse)
- MPR#7680, GPR#1497: Incorrect interaction between Matching.for_let and
Simplif.simplify_exits
(Alain Frisch, report and review by Vincent Laviron)
- MPR#7682, GPR#1495: fix [@@unboxed] for records with 1 polymorphic field
(Alain Frisch, report by Stéphane Graham-Lengrand, review by Gabriel Scherer)
- MPR#7695, GPR#1541: Fatal error: exception Ctype.Unify(_) with field override
(Jacques Garrigue, report by Nicolás Ojeda Bär)
- MPR#7704, GPR#1564: use proper variant tag in non-exhaustiveness warning
(Jacques Garrigue, report by Thomas Refis)
- MPR#7711, GPR#1581: Internal typechecker error triggered by a constraint on
self type in a class type
(Jacques Garrigue, report and review by Florian Angeletti)
- MPR#7712, GPR#1576: assertion failure with type abbreviations
(Thomas Refis, report by Michael O'Connor, review by Jacques Garrigue)
- MPR#7747: Type checker can loop infinitly and consumes all computer memory
(Jacques Garrigue, report by kantian)
- MPR#7751, GPR#1657: The toplevel prints some concrete types as abstract
(Jacques Garrigue, report by Matej Kosik)
- MPR#7765, GPR#1718: When unmarshaling bigarrays, protect against integer
overflows in size computations
(Xavier Leroy, report by Maximilian Tschirschnitz,
review by Gabriel Scherer)
- PR#7760, GPR#1713: Exact selection of lexing engine, that is
correct "Segfault in ocamllex-generated code using 'shortest'"
(Luc Maranget, Frédéric Bour, report by Stephen Dolan,
review by Gabriel Scherer)
- GPR#1517: More robust handling of type variables in mcomp
(Leo White and Thomas Refis, review by Jacques Garrigue)
- GPR#1530, GPR#1574: testsuite, fix 'make parallel' and 'make one DIR=...'
to work on ocamltest-based tests.
(Runhang Li and Sébastien Hinderer, review by Gabriel Scherer)
- GPR#1550, GPR#1555: Make pattern matching warnings more robust
to ill-typed columns
(Thomas Refis, with help from Gabriel Scherer and Luc Maranget)
- GPR#1614: consider all bound variables when inlining, fixing a compiler
fatal error.
(Xavier Clerc, review by Pierre Chambart, Leo White)
- GPR#1622: fix bug in the expansion of command-line arguments under Windows
which could result in some elements of Sys.argv being truncated in some cases.
(Nicolás Ojeda Bär, review by Sébastien Hinderer)
- GPR#1661: more precise principality warning regarding record fields
disambiguation
(Thomas Refis, review by Leo White)
- GPR#1722: Scrape types in Typeopt.maybe_pointer
(Leo White, review by Thomas Refis)
- GPR#1755: ensure that a bigarray is never collected while reading complex
values (Xavier Clerc, Mark Shinwell and Leo White, report by Chris Hardin,
reviews by Stephen Dolan and Xavier Leroy)
- GPR#1764: in byterun/memory.c, struct pool_block, use C99 flexible arrays
if available
(Xavier Leroy, review by Max Mouratov)
- MPR#7793, GPR#1766: the toplevel #use directive now accepts sequences of ';;'
tokens. This fixes a bug in which certain files accepted by the compiler were
rejected by ocamldep.
(Nicolás Ojeda Bär, report by Hugo Heuzard, review by Hugo Heuzard)
- GPR#1774: ocamlopt for ARM could generate VFP loads and stores with bad
offsets, rejected by the assembler.
(Xavier Leroy, review by Mark Shinwell)
OCaml 4.06.1 (16 Feb 2018):
---------------------------
### Bug fixes
- MPR#7661, GPR#1459: fix faulty compilation of patterns
using extensible variants constructors
(Luc Maranget, review by Thomas Refis and Gabriel Scherer, report
by Abdelraouf Ouadjaout and Thibault Suzanne)
- MPR#7702, GPR#1553: refresh raise counts when inlining a function
(Vincent Laviron, Xavier Clerc, report by Cheng Sun)
- MPR#7704, GPR#1559: Soundness issue with private rows and pattern-matching
(Jacques Garrigue, report by Jeremy Yallop, review by Thomas Refis)
- MPR#7705, GPR#1558: add missing bounds check in Bigarray.Genarray.nth_dim.
(Nicolás Ojeda Bär, report by Jeremy Yallop, review by Gabriel Scherer)
- MPR#7713, GPR#1587: Make pattern matching warnings more robust
to ill-typed columns; this is a backport of GPR#1550 from 4.07+dev
(Thomas Refis, review by Gabriel Scherer, report by Andreas Hauptmann)
- GPR#1470: Don't commute negation with float comparison
(Leo White, review by Xavier Leroy)
- GPR#1538: Make pattern matching compilation more robust to ill-typed columns
(Gabriel Scherer and Thomas Refis, review by Luc Maranget)
OCaml 4.06.0 (3 Nov 2017):
--------------------------
(Changes that can break existing programs are marked with a "*")
### Language features:
- MPR#6271, MPR#7529, GPR#1249: Support "let open M in ..."
in class expressions and class type expressions.
(Alain Frisch, reviews by Thomas Refis and Jacques Garrigue)
- GPR#792: fix limitations of destructive substitutions, by
allowing "S with type t := type-expr",
"S with type M.t := type-expr", "S with module M.N := path"
(Valentin Gatien-Baron, review by Jacques Garrigue and Leo White)
* GPR#1064, GPR#1392: extended indexing operators, add a new class of
user-defined indexing operators, obtained by adding at least
one operator character after the dot symbol to the standard indexing
operators: e,g ".%()", ".?[]", ".@{}<-":
let ( .%() ) = List.nth in [0; 1; 2].%(1)
After this change, functions or methods with an explicit polymorphic type
annotation and of which the first argument is optional now requires a space
between the dot and the question mark,
e.g. "<f:'a.?opt:int->unit>" must now be written "<f:'a. ?opt:int->unit>".
(Florian Angeletti, review by Damien Doligez and Gabriel Radanne)
- GPR#1118: Support inherited field in object type expression
type t = < m : int >
type u = < n : int; t; k : int >
(Runhang Li, review by Jeremy Yallop, Leo White, Jacques Garrigue,
and Florian Angeletti)
* GPR#1232: Support Unicode character escape sequences in string
literals via the \u{X+} syntax. These escapes are substituted by the
UTF-8 encoding of the Unicode character.
(Daniel Bünzli, review by Damien Doligez, Alain Frisch, Xavier
Leroy and Leo White)
- GPR#1247: M.(::) construction for expressions
and patterns (plus fix printing of (::) in the toplevel)
(Florian Angeletti, review by Alain Frisch, Gabriel Scherer)
* GPR#1252: The default mode is now safe-string, can be overridden
at configure time or at compile time.
(See GPR#1386 below for the configure-time options)
This breaks the code that uses the 'string' type as mutable
strings (instead of Bytes.t, introduced by 4.02 in 2014).
(Damien Doligez)
* GPR#1253: Private extensible variants
This change breaks code relying on the undocumented ability to export
extension constructors for abstract type in signature. Briefly,
module type S = sig
type t
type t += A
end
must now be written
module type S = sig
type t = private ..
type t += A
end
(Leo White, review by Alain Frisch)
- GPR#1333: turn off warning 40 by default
(Constructor or label name used out of scope)
(Leo White)
- GPR#1348: accept anonymous type parameters in `with` constraints:
S with type _ t = int
(Valentin Gatien-Baron, report by Jeremy Yallop)
### Type system
- MPR#248, GPR#1225: unique names for weak type variables
# ref [];;
- : '_weak1 list ref = {contents = []}
(Florian Angeletti, review by Frédéric Bour, Jacques Garrigue,
Gabriel Radanne and Gabriel Scherer)
* MPR#6738, MPR#7215, MPR#7231, GPR#556: Add a new check that 'let rec'
bindings are well formed.
(Jeremy Yallop, reviews by Stephen Dolan, Gabriel Scherer, Leo
White, and Damien Doligez)
- GPR#1142: Mark assertions nonexpansive, so that 'assert false'
can be used as a placeholder for a polymorphic function.
(Stephen Dolan)
### Standard library:
- MPR#1771, MPR#7309, GPR#1026: Add update to maps. Allows to update a
binding in a map or create a new binding if the key had no binding
val update: key -> ('a option -> 'a option) -> 'a t -> 'a t
(Sébastien Briais, review by Daniel Bünzli, Alain Frisch and
Gabriel Scherer)
- MPR#7515, GPR#1147: Arg.align now optionally uses the tab character '\t' to
separate the "unaligned" and "aligned" parts of the documentation string. If
tab is not present, then space is used as a fallback. Allows to have spaces in
the unaligned part, which is useful for Tuple options.
(Nicolás Ojeda Bär, review by Alain Frisch and Gabriel Scherer)
* GPR#615: Format, add symbolic formatters that output symbolic
pretty-printing items. New fields have been added to the
formatter_out_functions record, thus this change will break any code building
such record from scratch.
When building Format.formatter_out_functions values redefining the out_spaces field,
"{ fmt_out_funs with out_spaces = f; }" should be replaced by
"{ fmt_out_funs with out_spaces = f; out_indent = f; }" to maintain the old behavior.
(Richard Bonichon and Pierre Weis, review by Alain Frisch, original request by
Spiros Eliopoulos in GPR#506)
* GPR#943: Fixed the divergence of the Pervasives module between the stdlib
and threads implementations. In rare circumstances this can change the
behavior of existing applications: the implementation of Pervasives.close_out
used when compiling with thread support was inconsistent with the manual.
It will now not suppress exceptions escaping Pervasives.flush anymore.
Developers who want the old behavior should use Pervasives.close_out_noerr
instead. The stdlib implementation, used by applications not compiled
with thread support, will now only suppress Sys_error exceptions in
Pervasives.flush_all. This should allow exceedingly unlikely assertion
exceptions to escape, which could help reveal bugs in the standard library.
(Markus Mottl, review by Hezekiah M. Carty, Jeremie Dimino, Damien Doligez,
Alain Frisch, Xavier Leroy, Gabriel Scherer and Mark Shinwell)
- GPR#1034: List.init : int -> (int -> 'a) -> 'a list
(Richard Degenne, review by David Allsopp, Thomas Braibant, Florian
Angeletti, Gabriel Scherer, Nathan Moreau, Alain Frisch)
- GRP#1091 Add the Uchar.{bom,rep} constants.
(Daniel Bünzli, Alain Frisch)
- GPR#1091: Add Buffer.add_utf_{8,16le,16be}_uchar to encode Uchar.t
values to the corresponding UTF-X transformation formats in Buffer.t
values.
(Daniel Bünzli, review by Damien Doligez, Max Mouratov)
- GPR#1175: Bigarray, add a change_layout function to each Array[N]
submodules.
(Florian Angeletti)
* GPR#1306: In the MSVC and Mingw ports, "Sys.rename src dst" no longer fails if
file "dst" exists, but replaces it with file "src", like in the other ports.
(Xavier Leroy)
- GPR#1314: Format, use the optional width information
when formatting a boolean: "%8B", "%-8B" for example
(Xavier Clerc, review by Gabriel Scherer)
- c9cc0f25138ce58e4f4e68c4219afe33e2a9d034: Resurrect tabulation boxes
in module Format. Rewrite/extend documentation of tabulation boxes.
(Pierre Weis)
### Other libraries:
- MPR#7564, GPR#1211: Allow forward slashes in the target of symbolic links
created by Unix.symlink under Windows.
(Nicolás Ojeda Bär, review by David Allsopp)
* MPR#7640, GPR#1414: reimplementation of Unix.execvpe to fix issues
with the 4.05 implementation. The main issue is that the current
directory was always searched (last), even if the current directory
is not listed in the PATH.
(Xavier Leroy, report by Louis Gesbert and Arseniy Alekseyev,
review by Ivan Gotovchits)
- GPR#997, GPR#1077: Deprecate Bigarray.*.map_file and add Unix.map_file as a
first step towards moving Bigarray to the stdlib
(Jérémie Dimino and Xavier Leroy)
* GPR#1178: remove the Num library for arbitrary-precision arithmetic.
It now lives as a separate project https://github.com/ocaml/num
with an OPAM package called "num".
(Xavier Leroy)
- GPR#1217: Restrict Unix.environment in privileged contexts; add
Unix.unsafe_environment.
(Jeremy Yallop, review by Mark Shinwell, Nicolás Ojeda Bär,
Damien Doligez and Hannes Mehnert)
- GPR#1321: Reimplement Unix.isatty on Windows. It no longer returns true for
the null device.
(David Allsopp)
### Compiler user-interface and warnings:
- MPR#7361, GPR#1248: support "ocaml.warning" in all attribute contexts, and
arrange so that "ocaml.ppwarning" is correctly scoped by surrounding
"ocaml.warning" attributes
(Alain Frisch, review by Florian Angeletti and Thomas Refis)
- MPR#7444, GPR#1138: trigger deprecation warning when a "deprecated"
attribute is hidden by signature coercion
(Alain Frisch, report by bmillwood, review by Leo White)
- MPR#7472: ensure .cmi files are created atomically,
to avoid corruption of .cmi files produced simultaneously by a run
of ocamlc and a run of ocamlopt.
(Xavier Leroy, from a suggestion by Gerd Stolpmann)
* MPR#7514, GPR#1152: add -dprofile option, similar to -dtimings but
also displays memory allocation and consumption.
The corresponding addition of a new compiler-internal
Profile module may affect some users of
compilers-libs/ocamlcommon (by creating module conflicts).
(Valentin Gatien-Baron, report by Gabriel Scherer)
- MPR#7620, GPR#1317: Typecore.force_delayed_checks does not run with -i option
(Jacques Garrigue, report by Jun Furuse)
- MPR#7624: handle warning attributes placed on let bindings
(Xavier Clerc, report by dinosaure, review by Alain Frisch)
- GPR#896: "-compat-32" is now taken into account when building .cmo/.cma
(Hugo Heuzard)
- GPR#948: the compiler now reports warnings-as-errors by prefixing
them with "Error (warning ..):", instead of "Warning ..:" and
a trailing "Error: Some fatal warnings were triggered" message.
(Valentin Gatien-Baron, review by Alain Frisch)
- GPR#1032: display the output of -dtimings as a hierarchy
(Valentin Gatien-Baron, review by Gabriel Scherer)
- GPR#1114, GPR#1393, GPR#1429: refine the (ocamlc -config) information
on C compilers: the variables `{bytecode,native}_c_compiler` are deprecated
(the distinction is now mostly meaningless) in favor of a single
`c_compiler` variable combined with `ocaml{c,opt}_cflags`
and `ocaml{c,opt}_cppflags`.
(Sébastien Hinderer, Jeremy Yallop, Gabriel Scherer, review by
Adrien Nader and David Allsopp)
* GPR#1189: allow MSVC ports to use -l option in ocamlmklib
(David Allsopp)
- GPR#1332: fix ocamlc handling of "-output-complete-obj"
(François Bobot)
- GPR#1336: -thread and -vmthread option information is propagated to
PPX rewriters.
(Jun Furuse, review by Alain Frisch)
### Code generation and optimizations:
- MPR#5324, GPR#375: An alternative Linear Scan register allocator for
ocamlopt, activated with the -linscan command-line flag. This
allocator represents a trade-off between worse generated code
performance for higher compilation speed (especially interesting in
some cases graph coloring is necessarily quadratic).
(Marcell Fischbach and Benedikt Meurer, adapted by Nicolás Ojeda Bär, review
by Nicolás Ojeda Bär and Alain Frisch)
- MPR#6927, GPR#988: On macOS, when compiling bytecode stubs, plugins,
and shared libraries through -output-obj, generate dylibs instead of
bundles.
(whitequark)
- MPR#7447, GPR#995: incorrect code generation for nested recursive bindings
(Leo White and Jeremy Yallop, report by Stephen Dolan)
- MPR#7501, GPR#1089: Consider arrays of length zero as constants
when using Flambda.
(Pierre Chambart, review by Mark Shinwell and Leo White)
- MPR#7531, GPR#1162: Erroneous code transformation at partial applications
(Mark Shinwell)
- MPR#7614, GPR#1313: Ensure that inlining does not depend on the order
of symbols (flambda)
(Leo White, Xavier Clerc, report by Alex, review by Gabriel Scherer
and Pierre Chambart)
- MPR#7616, GPR#1339: don't warn on mutation of zero size blocks.
(Leo White)
- MPR#7631, GPR#1355: "-linscan" option crashes ocamlopt
(Xavier Clerc, report by Paul Steckler)
- MPR#7642, GPR#1411: ARM port: wrong register allocation for integer
multiply on ARMv4 and ARMv5; possible wrong register allocation for
floating-point multiply and add on VFP and for floating-point
negation and absolute value on soft FP emulation.
(Xavier Leroy, report by Stéphane Glondu and Ximin Luo,
review and additional sightings by Mark Shinwell)
* GPR#659: Remove support for SPARC native code generation
(Mark Shinwell)
- GPR#850: Optimize away some physical equality
(Pierre Chambart, review by Mark Shinwell and Leo White)
- GPR#856: Register availability analysis
(Mark Shinwell, Thomas Refis, review by Pierre Chambart)
- GPR#1143: tweaked several allocation functions in the runtime by
checking for likely conditions before unlikely ones and eliminating
some redundant checks.
(Markus Mottl, review by Alain Frisch, Xavier Leroy, Gabriel Scherer,
Mark Shinwell and Leo White)
- GPR#1183: compile curried functors to multi-argument functions
earlier in the compiler pipeline; correctly propagate [@@inline]
attributes on such functors; mark functor coercion veneers as
stubs.
(Mark Shinwell, review by Pierre Chambart and Leo White)
- GPR#1195: Merge functions based on partiality rather than
Parmatch.irrefutable.
(Leo White, review by Thomas Refis, Alain Frisch and Gabriel Scherer)
- GPR#1215: Improve compilation of short-circuit operators
(Leo White, review by Frédéric Bour and Mark Shinwell)
- GPR#1250: illegal ARM64 assembly code generated for large combined allocations
(report and initial fix by Steve Walk, review and final fix by Xavier Leroy)
- GPR#1271: Don't generate Ialloc instructions for closures that exceed
Max_young_wosize; instead allocate them on the major heap. (Related
to GPR#1250.)
(Mark Shinwell)
- GPR#1294: Add a configure-time option to remove the dynamic float array
optimization and add a floatarray type to let the user choose when to
flatten float arrays. Note that float-only records are unchanged: they
are still optimized by unboxing their fields.
(Damien Doligez, review by Alain Frisch and Mark Shinwell)
- GPR#1304: Mark registers clobbered by PLT stubs as destroyed across
allocations.
(Mark Shinwell, Xavier Clerc, report and initial debugging by
Valentin Gatien-Baron)
- GPR#1323: make sure that frame tables are generated in the data
section and not in the read-only data section, as was the case
before in the PPC and System-Z ports. This avoids relocations in
the text segment of shared libraries and position-independent
executables generated by ocamlopt.
(Xavier Leroy, review by Mark Shinwell)
- GPR#1330: when generating dynamically-linkable code on AArch64, always
reference symbols (even locally-defined ones) through the GOT.
(Mark Shinwell, review by Xavier Leroy)
### Tools:
- MPR#1956, GPR#973: tools/check-symbol-names checks for globally
linked names not namespaced with caml_
(Stephen Dolan)
- MPR#6928, GPR#1103: ocamldoc, do not introduce an empty <h1> in index.html
when no -title has been provided
(Pierre Boutillier)
- MPR#7048: ocamldoc, in -latex mode, don't escape Latin-1 accented letters
(Xavier Leroy, report by Hugo Herbelin)
* MPR#7351: ocamldoc, use semantic tags rather than <br> tags in the html
backend