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OCaml 4.04.0:
-------------
(Changes that can break existing programs are marked with a "*")
### Language features:
- GPR#187, GPR#578: Local opening of modules in a pattern.
Syntax: "M.(p)", "M.[p]","M.[| p |]", "M.{p}"
(Florian Angeletti, Jacques Garrigue, review by Alain Frisch)
- GPR#301: local exception declarations "let exception ... in"
(Alain Frisch)
- PR#7233: Support GADT equations on non-local abstract types
(Jacques Garrigue)
- GPR#548: empty documentation comments
(Florian Angeletti)
### Compiler user-interface:
* PR#6475, GPR#464: interpret all command-line options before compiling any files,
changes (improves) the semantics of repeated -o options or -o combined with -c
see the super-detailed commit message at
https://github.com/ocaml/ocaml/commit/da56cf6dfdc13c09905c2e07f1d4849c8346eec8
(whitequark)
* GPR#591: Improve support for OCAMLPARAM: (i) do not use objects
files with -a, -pack, -shared; (ii) use "before" objects in the toplevel
(but not "after" objects); (iii) use -I dirs in the toplevel,
(iv) fix bug where -I dirs were ignored when using threads
(Marc Lasson, review by Damien Doligez and Alain Frisch)
- PR#7139: clarify the wording of Warning 38
(Unused exception or extension constructor)
(Gabriel Scherer)
- PR#7169, clarify the wording of Warning 8
(Non-exhaustivity warning for pattern matching)
(Florian Angeletti, review and report by Gabriel Scherer)
* PR#7147, GPR#475: add colors when reporting errors generated by ppx rewriters.
Remove the `Location.errorf_prefixed` function which is no longer relevant
(Simon Cruanes, Jérémie Dimino)
### Standard library:
- GPR#589: Add a non-allocating function to recover the number of
allocated minor words.
(Pierre Chambart, review by Damien Doligez and Gabriel Scherer)
- PR#6279, GPR#553: implement Set.map
(Gabriel Scherer)
- GPR#473: Provide `Sys.backend_type` so that user can write backend-specific
code in some cases (for example, code generator).
(Hongbo Zhang)
- PR#6820, GPR#560: Add Obj.reachable_words to compute the
"transitive" heap size of a value
(Alain Frisch, review by Marc Shinwell and Damien Doligez)
- GPR#626: String.split_on_char
(Alain Frisch)
- GPR#669: Filename.extension and Filename.remove_extension
(Alain Frisch, request by Edgar Aroutiounian, review by Daniel Bunzli
and Damien Doligez)
### Code generation and optimizations:
- PR#4747, GPR#328: Optimize Hashtbl by using in-place updates of its
internal bucket lists. All operations run in constant stack size
and are usually faster, except Hashtbl.copy which can be much
slower
(Alain Frisch)
- GPR#427: Obj.is_block is now an inlined OCaml function instead of a
C external. This should be faster.
(Demi Obenour)
* PR#6217, GPR#538: Optimize performance of record update:
no more performance cliff when { foo with t1 = ..; t2 = ...; ... }
hits 6 updated fields
(Olivier Nicole, review by Thomas Braibant and Pierre Chambart)
- PR#7023, GPR#336: Better unboxing strategy
(Alain Frisch, Pierre Chambart)
- GPR#580: Optimize immutable float records
(Pierre Chambart, review by Marc Shinwell)
- GPR#602: Do not generate dummy code to force module linking
(Pierre Chambart, reviewed by Jacques Garrigue)
### Tools:
- MPR#7189: toplevel #show, follow chains of module aliases
(Gabriel Scherer, report by Daniel Bünzli, review by Thomas Refis)
- MPR#7248: have ocamldep interpret -open arguments in left-to-right order
(Gabriel Scherer, report by Anton Bachin)
- GPR#452: Make the output of ocamldep more stable
(Alain Frisch)
- GPR#598: Add a --strict option to ocamlyacc treat conflicts as errors
(this option is now used for the compiler's parser)
(Jeremy Yallop)
- GPR#613: make ocamldoc use -open arguments
(Florian Angeletti)
- Add the -no-version option to the toplevel
(Sébastien Hinderer)
### Runtime system:
- PR#7203, GPR#534: Add a new primitive caml_alloc_float_array to allocate an
array of floats
(Thomas Braibant)
### Manual and documentation:
- PR#7243: warn users against using WinZip to unpack the source archive
(Damien Doligez, report by Shayne Fletcher)
- PR#7245, GPR#565: clarification to the wording and documentation
of Warning 52 (fragile constant pattern)
(Gabriel Scherer, William, Adrien Nader, Jacques Garrigue)
### Build system:
- GPR#512: Installed `ocamlc`, `ocamlopt`, and `ocamllex` are now the
native-code versions of the tools, if those versions were built.
(Demi Obenour)
- GPR#324: Compiler developers: Adding new primitives to the
standard runtime doesn't require anymore to run `make bootstrap`
(François Bobot)
- GPR#384: Fix compilation using old Microsoft C Compilers not
supporting secure CRT functions (SDK Visual Studio 2005 compiler and
earlier) and standard 64-bit integer literals (Visual Studio .NET
2002 and earlier)
(David Allsopp)
- GPR#507: More sharing between Unix and Windows makefiles
(whitequark, review by Alain Frisch)
### Bug fixes:
* PR#6505: Missed Type-error leads to a segfault upon record access.
(Jacques Garrigue, extra report by Stephen Dolan)
Proper fix required a more restrictive approach to recursive types:
mutually recursive types are seen as abstract types (i.e. non-contractive)
when checking the well-foundedness of the recursion.
* PR#6752: Extensible variant types and scope escaping
Revert to strict scope, see comments on Mantis.
(Jacques Garrigue, following discussion with Jeremy Yallop,
Nicolas Ojeda Bar and Alain Frisch)
- PR#7112: Aliased arguments ignored for equality of module types
(Jacques Garrigue, report by Leo White)
- PR#7153: document that Unix.SOCK_SEQPACKET is not really usable.
- PR#7257, GPR#583: revert a 4.03 change of behavior on (Unix.sleep 0.),
it now calls (nano)sleep for 0 seconds as in (< 4.03) versions.
(Hannes Mehnert, review by Damien Doligez)
- PR#7260: GADT + subtyping compile time crash
(Jacques Garrigue, report by Nicolas Ojeda Bar)
- PR#7269: Segfault from conjunctive constraints in GADT
(Jacques Garrigue, report by Stephen Dolan)
- PR#7276: Support more than FD_SETSIZE sockets in Windows' emulation
of select
(David Scott, review by Alain Frisch)
* PR#7278: Prevent private inline records from being mutated
(Alain Frisch, report by Pierre Chambart)
- PR#7284: Bug in mcomp_fields leads to segfault
(Jacques Garrigue, report by Leo White)
- PR#7285: Relaxed value restriction broken with principal
(Jacques Garrigue, report by Leo White)
- PR#7165, GPR#494: uncaught exception on invalid lexer directive
(Gabriel Scherer, report by KC Sivaramakrishnan using afl-fuzz)
* GPR#533: Thread library: fixed [Thread.wait_signal] so that it
converts back the signal number returned by [sigwait] to an
OS-independent number
(Jérémie Dimino)
- GPR#600: (similar to GPR#555) ensure that register typing constraints are
respected at N-way join points in the control flow graph
(Mark Shinwell)
- GPR#672: Fix float_of_hex parser to correctly reject some invalid forms
(Bogdan Tătăroiu, review by Thomas Braibant and Alain Frisch)
### Internal/compiler-libs changes:
- PR#7200, GPR#539: Improve, fix, and add test for parsing/pprintast.ml
(Runhang Li, David Sheets, Alain Frisch)
- GPR#351: make driver/pparse.ml functions type-safe
(Gabriel Scherer, Dmitrii Kosarev, review by Jérémie Dimino)
- GPR#516: Improve Texp_record constructor representation, and
propagate updated record type information
(Pierre Chambart, review by Alain Frisch)
- GPR#679: delay registration of docstring after the mapper is applied
(Hugo Heuzard, review by Leo White)
OCaml 4.03.0 (25 Apr 2016):
---------------------------
(Changes that can break existing programs are marked with a "*")
### Language features:
- PR#5528: inline records for constructor arguments
(Alain Frisch)
- PR#6220, PR#6403, PR#6437, PR#6801:
Improved redundancy and exhaustiveness checks for GADTs.
Namely, the redundancy checker now checks whether the uncovered pattern
of the pattern is actually inhabited, exploding at most one wild card.
This is also done for exhaustiveness when there is only one case.
Additionally, one can now write unreachable cases, of the form
"pat -> .", which are treated by the redundancy check.
(Jacques Garrigue)
- PR#6374: allow "_ t" as a short-hand for "(_, _, ..) t" for n-ary type
constructors
(Alain Frisch)
- PR#6714: allow [@@ocaml.warning] on most structure and signature items:
values, modules, module types
(whitequark)
- PR#6806: Syntax shortcut for putting a type annotation on a record field:
{ f1 : typ = e } is sugar for { f1 = (e : typ) }
{ f1 : typ } is sugar for { f1 = (f1 : typ) }
(Valentin Gatien-Baron, review by Jérémie Dimino)
- PR#6806: Allow type annotations before the "->" in "fun <args> -> <expr>"
fun x y : (int * int) -> (x, y)
(Valentin Gatien-Baron, review by Jérémie Dimino)
- GPR#26: support for "(type a b)" as syntactic sugar for "(type a) (type b)"
(Gabriel Scherer)
- GPR#42: short functor type syntax: "S -> T" for "functor (_ : S) -> T"
(Leo White)
- GPR#88: allow field punning in object copying expressions:
{< x; y; >} is sugar for {< x = x; y = y; >}
(Jeremy Yallop)
- GPR#112: octal escape sequences for char and string literals
"Make it \o033[1mBOLD\o033[0m"
(Rafaël Bocquet, request by John Whitingthon)
- GPR#167: allow to annotate externals' arguments and result types so
they can be unboxed or untagged: [@unboxed], [@untagged]. Supports
untagging int and unboxing int32, int64, nativeint and float.
(Jérémie Dimino, Mark Shinwell)
- GPR#173: [@inline] and [@inlined] attributes (for function declarations
and call sites respectively) to control inlining
(Pierre Chambart, Mark Shinwell)
- GPR#188: accept [@@immediate] attribute on type declarations to mark types
that are represented at runtime by an integer
(Will Crichton, reviewed by Leo White)
* GPR#234: allow "[]" as a user-defined constructor. Demand parenthesis
around "::" when using "::" as user-defined constructor:
code using "| :: of ..." must change to "| (::) of ...".
(Runhang Li, review by Damien Doligez)
- GPR#240: replace special annotations on externals by attributes:
* "float" is generalized to [@@unboxed]
* "noalloc" becomes [@@noalloc]
Deprecate "float" and "noalloc".
(Jérémie Dimino)
- GPR#254: @ocaml.warn_on_literal_pattern attribute on constructors to
warn when the argument is matches against a constant pattern. This
attribute is applied on predefined exception constructors which
carry purely informational (with no stability guarantee) messages.
(Alain Frisch)
- GPR#268: hexadecimal notation for floating-point literals: -0x1.ffffp+987
In OCaml source code, FP literals can be written using the hexadecimal
notation 0x<mantissa in hex>p<exponent> from ISO C99.
(Xavier Leroy)
- GPR#273: allow to get the extension slot of an extension constructor
by writing [%extension_constructor <path>]
(Jérémie Dimino)
- GPR#282: change short-paths penalty heuristic to assign the same cost to
idents containing double underscores as to idents starting with an underscore
(Thomas Refis, Leo White)
- PR#6681 GPR#326: signature items are now accepted as payloads for
extension and attributes, using the syntax [%foo: SIG ] or [@foo: SIG ].
Examples: "[%%client: val foo : int]" or "val%client foo : int".
(Alain Frisch and Gabriel Radanne)
* GPR#342: Allow shortcuts for extension and attributes on all keywords:
module%foo, class[@foo], etc.
The attribute in "let[@foo] .. in .." is now attached to the value binding,
not to the expression.
(Gabriel Radanne)
### Compilers:
* PR#4231, PR#5461: warning 31 is now fatal by default
(Warning 31: A module is linked twice in the same executable.)
This is an interim solution; double-linking of modules has dangerous
semantics, eg. exception constructors end up with two distinct declarations.
(Alain Frisch)
- PR#4800: better compilation of tuple assignment
(Gabriel Scherer and Alain Frisch)
- PR#5995: keep -for-pack into account to name exceptions;
-for-pack should now be used during bytecode compilation as well
(Alain Frisch, report by Christophe Troestler)
- PR#6400: better error message for '_' used as an expression
(Alain Frisch, report by whitequark)
- PR#6501: harden the native-code generator against certain uses of "%identity"
(Xavier Leroy, report by Antoine Miné)
- PR#6636: add --version option
(whitequark)
- PR#6679: fix pprintast printing of constraints in type declarations
(Alain Frisch, report by Jun Furuse)
- PR#6737: fix Typedtree attributes on (fun x -> body) expressions
(Alain Frisch, report by Oleg Kiselyov)
* PR#6865: remove special case for parsing "let _ = expr" in structures
(Jérémie Dimino, Alain Frisch)
* PR#6438, PR#7059, GPR#315: Pattern guard disables exhaustiveness check
(function Some x when x = 0 -> ()) will now raise warning 8 (non-exhaustive)
instead of warning 25 (all clauses are guarded). 25 isn't raised anymore.
Projects that set warning 8 as an error may fail to compile (presumably
this is the semantics they wanted).
(Alain Frisch, request by Martin Jambon and John Whitington)
- PR#6920: fix debug informations around uses of %apply or %revapply
(Jérémie Dimino, report by Daniel Bünzli)
- PR#6939: Segfault with improper use of let-rec
(Alain Frisch)
- PR#6943: native-code generator for POWER/PowerPC 64 bits, both in
big-endian (ppc64) and little-endian (ppc64le) configuration.
(Xavier Leroy, with inspiration from RedHat's unofficial ppc64 and ppc64le
ports)
- PR#6979: better code generation in x86-32 backend for copying floats to
the stack
(Marc Lasson, review by Xavier Leroy)
- PR#7018: fix missing identifier renaming during inlining
(Alain Frisch, review by Xavier Leroy)
- PR#7022, GPR#259: unbox float and boxed ints earlier, avoid second pass
(Alain Frisch)
- PR#7026, GPR#288: remove write barrier for polymorphic variants without
arguments
(Simon Cruanes)
- PR#7031: new warning 57, ambiguous guarded or-patterns
(Luc Maranget, Gabriel Scherer, report by Martin Clochard and Claude Marché)
- PR#7064, GPR#316: allowing to mark compilation units and sub-modules as
deprecated
(Alain Frisch)
- PR#7067: fix performance regression (wrt. 4.01) in the native compiler
for long nested structures
(Alain Frisch, report by Daniel Bünzli, review by Jacques Garrigue)
- PR#7097: fix strange syntax error message around illegal packaged module
signature constraints
(Alain Frisch, report by Jun Furuse)
- PR#7118, PR#7120, GPR#408, GPR#476: Bug fixed in stack unwinding
metadata generation. Was a cause of crashes in GUI programs on OS X.
(Bart Jacobs, review by Mark Shinwell)
- PR#7168: Exceeding stack limit in bytecode can lead to a crash.
(Jacques-Henri Jourdan)
- PR#7232: Strange Pprintast output with ppx_deriving
(Damien Doligez, report by Anton Bachin)
- GPR#17: some cmm optimizations of integer operations with constants
(Stephen Dolan, review by Pierre Chambart)
- GPR#89: improve type-specialization of unapplied primitives:
unapplied annotations (compare : int -> _),
type propagation (List.sort compare [1;2;3])
and propagation from module signatures now lead to specialization
(Frédéric Bour, review by Gabriel Scherer)
- GPR#107: Prevent more unnecessary float boxing, especially in `if` and `match`
(Vladimir Brankov, review by Alain Frisch)
- GPR#109: new (lazy) unboxing strategy for float and int references
(Vladimir Brankov, review by Alain Frisch)
- GPR#115: More precise typing of values at the C-- and Mach level.
(Xavier Leroy, review by Pierre Chambart)
- GPR#132: Flambda: new intermediate language and "middle-end" optimizers
(Pierre Chambart, Mark Shinwell, Leo White)
- GPR#212, PR#7226, GPR#542: emit column position in gas assembly `.loc`
(Frédéric Bour, Anton Bachin)
- GPR#207: Colors in compiler messages (warnings, errors)
configure with -color {auto|always|never} or TERM=dumb
(Simon Cruanes, review by Gabriel Scherer)
- GPR#258: more precise information on PowerPC instruction sizes
(Pierre Chambart, Xavier Leroy)
- GPR#263: improve code generation for if-equivalents of (&&) and (||)
(Pierre Chambart)
- GPR#270: Make [transl_exception_constructor] generate [Immutable] blocks
(Mark Shinwell)
- GPR#271: Fix incorrect mutability flag when records are built using "with"
(Mark Shinwell)
- GPR#275: native-code generator for IBM z System running Linux.
In memoriam Gene Amdahl, 1922-2015.
(Bill O'Farrell, Tristan Amini, Xavier Leroy)
- GPR#282: relax short-paths safety check in presence of module aliases, take
penalty into account while building the printing map.
(Thomas Refis, Leo White)
- GPR#306: Instrument the compiler to debug performance regressions
(Pierre Chambart)
- GPR#319: add warning 58 for missing cmx files, and
extend -opaque option to mli files: a missing .cmx does not warn
if the corresponding .cmi is compiled -opaque.
(Leo White)
- GPR#388: OCAML_FLEXLINK environment variable allows overriding flexlink
command (David Allsopp)
- GPR#392: put all parsetree invariants in a new module Ast_invariants
(Jérémie Dimino)
- GPR#407: don't display the name of compiled .c files when calling the
Microsoft C Compiler (same as the assembler).
(David Allsopp)
- GPR#431: permit constant float arrays to be eligible for pattern match
branch merging
(Pierre Chambart)
- GPR#455: provide more debugging information to Js_of_ocaml
(Jérôme Vouillon)
- GPR#514, GPR#554: Added several command-line flags to explicitly enable
settings that are currently the default:
`-alias-deps`, `-app-funct`, `-no-keep-docs`, `-no-keep-locs`,
`-no-principal`, `-no-rectypes`, `-no-strict-formats`
(Demi Obenour)
- GPR#545: use reraise to preserve backtrace on
`match .. with exception e -> raise e`
(Nicolas Ojeda Bar, review by Gabriel Scherer)
### Runtime system:
- PR#3612, PR#92: allow allocating custom block with finalizers
in the minor heap.
(Pierre Chambart)
* PR#6517: use ISO C99 types {,u}int{32,64}_t in preference to our homegrown
types {,u}int{32,64}.
C stubs may have to be updated as {,u}int{32,64}_t are not defined anymore.
(Xavier Leroy)
- PR#6760: closures evaluated in the toplevel can now be marshalled
(whitequark, review by Jacques-Henri Jourdan)
- PR#6902, GPR#210: emit a runtime warning on stderr
when finalizing an I/O channel which is still open:
"channel opened on file '...' dies without being closed"
this is controlled by OCAMLRUNPARAM=W=1 or with Sys.enable_runtime_warnings.
The behavior of affected program is not changed,
but they should still be fixed.
(Alain Frisch, review by Damien Doligez)
- Signal handling: for read-and-clear, use GCC/Clang atomic builtins
if available.
(Xavier Leroy)
- PR#6910, GPR#224: marshaling (output_value, input_value, et al)
now support marshaled data bigger than 4 Gb.
(Xavier Leroy)
* GPR#226: select higher levels of optimization for GCC >= 3.4 and Clang
when compiling the run-time system and C stub code.
"-std=gnu99 -O2 -fno-strict-aliasing -fwrapv" is used by default.
This also affects default flags for user stubs compiled with "ocamlc -c foo.c"
and may uncover bugs in them.
(Xavier Leroy)
- GPR#262: Multiple GC roots per compilation unit
(Pierre Chambart, Mark Shinwell, review by Damien Doligez)
* GPR#297: Several changes to improve the worst-case GC pause time.
Changes Gc.control and Gc.major_slice and adds functions to the Gc module.
(Damien Doligez, with help from Francois Bobot, Thomas Braibant, Leo White)
- GPR#325: Add v=0x400 flag to OCAMLRUNPARAM to display GC stats on exit
(Louis Gesbert, review by Alain Frisch)
### Standard library:
- PR#1460, GPR#230: Array.map2, Array.iter2
(John Christopher McAlpine)
- PR#5197, GPR#63: Arg: allow flags such as --flag=arg as well as --flag arg
(Richard Jones)
- PR#6017, PR#7034, GPR#267: More efficient ifprintf implementation
(Jeremy Yallop, review by Gabriel Scherer)
- PR#6296: Some documentation on the floating-point representations
recognized by Pervasives.float_of_string
(Xavier Leroy)
- PR#6316: Scanf.scanf failure on %u formats when reading big integers
(Xavier Leroy, Benoît Vaugon)
- PR#6321: guarantee that "hypot infinity nan = infinity"
(for conformance with ISO C99)
(Xavier Leroy)
- PR#6390, GPR#36: expose Sys.{int_size,max_wosize} for js_of_ocaml portability
(Hugo Heuzard)
- PR#6449: Add Map.union
(Alain Frisch)
* PR#6494: Add 'equal' functions in modules
Bytes, Char, Digest, Int32, Int64, Nativeint, and String
Users defining their own modules with signature 'module type of Int32'
have to extend their implementation.
(Romain Calascibetta)
* PR#6524, GPR#79: Filename: Optional ?perms argument to open_temp_file
May break partial applications of the function (fix by passing ?perms:None)
(Daniel Bünzli, review by Jacques-Pascal Deplaix)
* PR#6525, GPR#80: Add Uchar module to the standard library
May introduce module name conflicts with existing projects.
(Daniel Bünzli, review by Yoriyuki Yamagata and Damien Doligez)
- PR#6577: improve performance of %L, %l, %n, %S, %C format specifiers
(Alain Frisch)
- PR#6585: fix memory leak in win32unix/createprocess.c
(Alain Frisch, report by user 'aha')
- PR#6645, GPR#174: Guarantee that Set.add, Set.remove, Set.filter
return the original set if no change is required
(Alain Frisch, Mohamed Iguernlala)
- PR#6649, GPR#222: accept (int_of_string "+3")
(John Christopher McAlpine)
- PR#6694, PR#6695, GPR#124: deprecate functions using ISO-8859-1 character set
in Char, Bytes, String and provide alternatives *_acii using US-ASCII.
Affected functions:
{Char,String,Bytes}.{uppercase,lowercase},
{String,Bytes}.{capitalize,uncaptialize}
(whitequark, review by Damien Doligez)
- GPR#22: Add the Ephemeron module that implements ephemerons and weak
hash table
(François Bobot, review by Damien Doligez, Daniel Bünzli,
Alain Frisch, Pierre Chambart)
- GPR#164: more efficient (branchless) implementation of Pervasives.compare
specialized at type 'float'.
(Vladimir Brankov)
- GPR#175: Guarantee that Map.add, Map.remove, Map.filter
return the original map if no change is required.
(Mohamed Iguernlala)
- GPR#201: generalize types of Printf.{ifprintf,ikfprintf}
(Maxence Guesdon)
- GPR#216: add the missing POSIX.1-2001 signals in Sys
(Guillaume Bury)
- GPR#239: remove type-unsafe code from Stream
(Pierre Chambart, review by Gabriel Scherer and Jeremy Yallop)
- GPR#250: Check for negative start element in Array.sub
(Jeremy Yallop)
- GPR#265: new implementation of Queue avoiding Obj.magic
(Jérémie Dimino)
- GPR#268, GPR#303: '%h' and '%H' modifiers for printf and scanf to
support floating-point numbers in hexadecimal notation
(Xavier Leroy, Benoît Vaugon)
- GPR#272: Switch classify_float to [@@unboxed]
(Alain Frisch)
- Improve speed of classify_float by not going through fpclassify()
(Alain Frisch, Xavier Leroy)
- GPR#277: Switch the following externals to [@@unboxed]:
* {Nativeint,Int32,Int64}.{of,to}_float
* Int{32,64}.float_of_bits
* Int{32,64}.bits_of_float
(Jérémie Dimino)
- GPR#281: Switch the following externals to [@@unboxed]:
* Sys.time (and [@@noalloc])
* Pervasives.ldexp (and [@@noalloc])
* Pervasives.compare for float, nativeint, int32, int64.
(François Bobot)
- PR#3622, GPR#195: add function Stack.fold
(Simon Cruanes)
- GPR#329: Add exists, for_all, mem and memq functions in Array
(Bernhard Schommer)
- GPR#337: Add [Hashtbl.filter_map_inplace]
(Alain Frisch)
- GPR#356: Add [Format.kasprintf]
(Jérémie Dimino, Mark Shinwell)
### Type system:
- PR#5545: Type annotations on methods cannot control the choice of abbreviation
(Jacques Garrigue)
* PR#6465: allow incremental weakening of module aliases.
This is done by adding equations to submodules when expanding aliases.
In theory this may be incompatible is some corner cases defining a module
type through inference, but no breakage known on published code.
(Jacques Garrigue)
- PR#6593: Functor application in tests/basic-modules fails after commit 15405
(Jacques Garrigue)
### Toplevel and debugger:
- PR#6113: Add descriptions to directives, and display them via #help
(Nick Giannarakis, Berke Durak, Francis Southern and Gabriel Scherer)
- PR#6396: Warnings-as-errors not properly flushed in the toplevel
(Alain Frisch)
- PR#6401: use proper error reporting for toplevel environment initialization:
no more Env.Error(_) at start time
(Gabriel Scherer, Alain Frisch)
- PR#6468: toplevel now supports backtraces if invoked with OCAMLRUNPARAM=b
(whitequark and Jake Donham,
review by Gabriel Scherer and Jacques-Henri Jourdan)
- PR#6906: wrong error location for unmatched paren with #use in toplevel
(Damien Doligez, report by Kenichi Asai)
- PR#6935, GPR#298: crash in debugger when load_printer is given a directory
(Junsong Li, review by Gabriel Scherer)
- PR#7081: report preprocessor warnings in the toplevel
(Valentin Gatien-Baron, review by Jérémie Dimino)
- PR#7098: Loss of ppx context in toplevel after an exception
(Alain Frisch, report by whitequark)
- PR#7101: The toplevel does not close in_channel for libraries specified on
its command line
(Alain Frisch)
- PR#7119: the toplevel does not respect [@@@warning]
(Alain Frisch, report by Gabriel Radanne)
### Other libraries:
* Unix library: channels created by Unix.in_channel_of_descr or
Unix.out_channel_of_descr no longer support text mode under Windows.
Calling [set_binary_mode_{in,out} chan false] on these channels
now causes an error.
(Xavier Leroy)
- PR#4023 and GPR#68: add Unix.sleepf (sleep with sub-second resolution)
(Evgenii Lepikhin and Xavier Leroy)
* Protect Unix.sleep against interruptions by handled signals.
Before, a handled signal could cause Unix.sleep to return early.
Now, the sleep is restarted until the given time is elapsed.
(Xavier Leroy)
* PR#6120, GPR#462: implement Unix.symlink and Unix.readlink on
Windows. Unix.symlink has a new optional argument to_dir (ignored on
non-native Windows platforms). stat functions reimplemented to avoid
buggy Microsoft CRT implementations (native Windows only)
(David Allsopp, review by Daniel Bünzli)
- PR#6263: add kind_size_in_bytes and size_in_bytes functions
to Bigarray module.
(Runhang Li, review by Mark Shinwell)
- PR#6289: Unix.utimes uses the current time only if both arguments
are exactly 0.0. Also, use sub-second resolution if available.
(Xavier Leroy, report by Christophe Troestler)
- PR#6896: serious reimplementation of Big_int.float_of_big_int and
Ratio.float_of_ratio, ensuring that the result is correctly rounded.
(Xavier Leroy)
- PR#6989: in Str library, make sure that all \(...\) groups are binding
and can be consulted with Str.matched_group. There used to be
a limitation to 32 binding groups.
(Xavier Leroy)
- PR#7013: spurious wake-up in the Event module
(Xavier Leroy)
- PR#7024: in documentation of Str regular expressions, clarify what
"end of line" means for "^" and "$" regexps.
(Xavier Leroy, question by Fredrik Lindgren)
- PR#7209: do not run at_exit handlers in [Unix.create_process] and
similar functions when the [exec] call fails in the child process
(Jérémie Dimino)
### OCamldep:
- GPR#286: add support for module aliases
(Jacques Garrigue)
### Manual:
- GPR#302: The OCaml reference manual is now included in the manual/
subdirectory of the main OCaml source repository. Contributions to
the manual are warmly welcome.
(François Bobot, review by Florian Angeletti)
- PR#6601: replace strcpy with caml_strdup in sample code
(Christopher Zimmermann)
- PR#6676: ongoing simplification of the "Language Extensions" section
(Alain Frisch, John Whitington)
- PR#6898: Update win32 support documentation of the Unix library
(Damien Doligez, report by Daniel Bünzli)
- PR#7092, GPR#379: Add missing documentation for new 4.03 features
(Florian Angeletti)
- PR#7094, GPR#468, GPR#551: add new section 8.5 to document warnings
The general idea is to document warnings that may require explanations.
Currently documented warnings are:
- 52: Fragile constant pattern.
- 57: Ambiguous or-pattern variables under guard
(Florian Angeletti and Gabriel Scherer)
- PR#7109, GPR#380: Fix bigarray documentation layout
(Florian Angeletti, Leo White)
### Bug fixes:
- PR#3612: memory leak in bigarray read from file
(Pierre Chambart, report by Gary Huber)
* PR#4166, PR#6956: force linking when calling external C primitives
(Jacques Garrigue, reports by Markus Mottl and Christophe Troestler)
* PR#4466, PR#5325: under Windows, concurrent read and write operations
on the same socket could block unexpectedly. Fixed by keeping sockets
in asynchronous mode rather than creating them in synchronous mode.
(Xavier Leroy)
* PR#4539: change exception string raised when comparing functional values
May break programs matching on the string argument of Invalid_argument.
Matching on the string argument of Invalid_argument or Failure is a
programming mistake: these strings may change in future versions.
(Nicolas Braud-Santoni, report by Eric Cooper)
- PR#4832: Filling bigarrays may block out runtime
(Markus Mottl)
- PR#5663: program rejected due to nongeneralizable type variable that
appears nowhere
(Jacques Garrigue, report by Stephen Weeks)
- PR#5780: report more informative type names in GADTs error messages
(Jacques Garrigue, report by Sebastien Furic)
- PR#5887: move the byterun/*.h headers to byterun/caml/*.h to avoid header
name clashes
(Jérôme Vouillon and Adrien Nader and whitequark)
* PR#6081: ocaml now adds script's directory to search path, not current
directory
(Thomas Leonard and Damien Doligez)
- PR#6108, PR#6802: fail cleanly if dynlink.cma or ocamltoplevel.cma
are loaded inside the toplevel loop.
(Xavier Leroy)
- PR#6171: Confusing error message when a type escapes its scope.
(Jacques Garrigue and Leo White, report by John Whitington)
- PR#6340: Incorrect handling of \r when processing "Windows" source files
(Damien Doligez, report by David Allsopp)
- PR#6342: Incorrect error message when type constraints differ
(Alain Frisch, report by Philippe Wang)
* PR#6521: {Bytes,Char,String}.escaped were locale-dependent
we now escape all non-ASCII-printable instead of a locale-dependent subset.
(Damien Doligez, report by Jun Furuse)
- PR#6526: ocamllex should not warn on unescaped newline inside comments
(Damien Doligez, report by user 'dhekir')
- PR#6341: ocamldoc -colorize-code adds spurious <br> tags to <pre> blocks
(Maxence Guesdon, report by Damien Doligez)
- PR#6560: Wrong failure message for {Int32,Int64,NativeInt}.of_string
It reported (Failure "int_of_string"), now "Int32.of_string" etc.
(Maxime Dénès and Gabriel Scherer)
- PR#6648: show_module should indicate its elision
(Jacques Garrigue, report by Leo White)
- PR#6650: Cty_constr not handled correctly by Subst
(Jacques Garrigue, report by Leo White)
- PR#6651: Failing component lookup
(Jacques Garrigue, report by Leo White)
* PR#6664: Crash when finalising lazy values of the wrong type.
(Damien Doligez)
- PR#6672: Unused variance specification allowed in with constraint
(Jacques Garrigue, report by Leo White)
- PR#6677: Allow to disable warning 39 (useless "rec") with [@ocaml.warning]
applied to the first value binding of the would-be "rec" declaration
(Alain Frisch, report by Jun Furuse)
- PR#6744: Univars can escape through polymorphic variants (partial fix)
(Jacques Garrigue, report by Leo White)
- PR#6752: Extensible variant types and scope escaping
A side-effect of the fix is that (ocamlc -i) sometimes reports
(type-sound) invalid signature, with a type used before its declaration.
(Jacques Garrigue, report by Maxence Guesdon)
- PR#6762: improve warning 45 in presence of re-exported type definitions
(Warning 45: open statement shadows the constructor)
(Alain Frisch, report by Olivier Andrieu)
- PR#6776: Failure to kill the "tick" thread, segfault when exiting the runtime
(Damien Doligez, report by Thomas Braibant)
- PR#6780: Poor error message for wrong -farch and -ffpu options (ocamlopt, ARM)
(Xavier Leroy, report by whitequark)
- PR#6805: Duplicated expression in case of hole in a non-failing switch.
(Luc Maranget)
* PR#6808: the parsing of OCAMLRUNPARAM is too lax
(Damien Doligez)
- PR#6874: Inefficient code generated for module function arguments
(Jacques Garrigue, report by Markus Mottl)
- PR#6888: The list command of ocamldebug uses the wrong file
(Damien Doligez, report by Pierre-Marie Pédrot)
- PR#6897: Bad error message for some pattern matching on extensible variants
(Alain Frisch, report by Gabriel Radanne)
- PR#6899: Optional parameters and non generalizable type variables
(Thomas Refis and Leo White)
- PR#6907: Stack overflow printing error in class declaration
(Jacques Garrigue, report by Ivan Gotovchits)
- PR#6931: Incorrect error message on type error inside record construction
(Damien Doligez, report by Leo White)
- PR#6938: fix regression on "%047.27{l,L,n}{d,i,x,X,o,u}"
(Benoît Vaugon, report by Arduino Cascella)
- PR#6944: let module X = Path in … is not typed as a module alias
(Jacques Garrigue, report by Frédéric Bour)
- PR#6945 and GPR#227: protect Sys and Unix functions against string
arguments containing the null character '\000'
(Simon Cruanes and Xavier Leroy, report by Daniel Bünzli)
- PR#6946: Uncaught exception with wrong type for "%ignore"
(Jacques Garrigue, report by Leo White)
- PR#6954: Infinite loop in type checker with module aliases
(Jacques Garrigue, report by Mark Mottl)
- PR#6972, GPR#276: 4.02.3 regression on documentation comments in .cmt files
(Leo White, report by Olivier Andrieu)
- PR#6977: String literals in comments interpret escape sequences
(Damien Doligez, report by Daniel Bünzli and David Sheets)
- PR#6980: Assert failure from polymorphic variants and existentials
(Jacques Garrigue, report by Leo White)
- PR#6981: Ctype.Unify(_) with associated functor arg refering to previous one
(Jacques Garrigue, report by Nicholas Labich)
- PR#6982: unexpected type error when packing a module alias
(Jacques Garrigue, report by Valentin Gatien-Baron)
- PR#6985: `module type of struct include Bar end exposes
%s#row when Bar contains private row types
(Jacques Garrigue, report by Nicholas Labich)
- PR#6992: Segfault from bug in GADT/module typing
(Jacques Garrigue, report by Stephen Dolan)
- PR#6993: Segfault from recursive modules violating exhaustiveness assumptions
(Jacques Garrigue, report by Stephen Dolan)
- PR#6998: Typer fails reading unnecessary cmis with -no-alias-deps and -w -49
(Leo White, report by Valentin Gatien-Baron)
- PR#7003: String.sub may cause segmentation fault on sizes above 2^31
(Damien Doligez, report by Radek Micek)
- PR#7008: Fatal error in ocamlc with empty compilation unit name
(Damien Doligez, report by Cesar Kunz)
- PR#7012: Variable name forgotten when it starts with a capital letter
(Jacques Garrigue, Gabriel Scherer,
report by Thomas Leonard and Florian Angeletti)
- PR#7016: fix Stack overflow in GADT typing
Note: Equi-recursive types are considered when checking GADT pattern
exhaustiveness, even when -rectypes is not used.
(Jacques Garrigue, report by Mikhail Mandrykin)
- PR#7030: libasmrun_shared.so fails to build on SPARC Solaris
(report and fix by Patrick Star)