Ruby Issue Tracking System

09/27/2026

10:12 PM Ruby Bug #22284 (Closed): Passing an object with to_int to curry as its arity causes problems with LLP64.

Applied in changeset commit:git|ec3b6b12e7fdd9eb833ba867eb862956a85f424b.
----------
[Bug #22284] Fix curry with a non-Fixnum arity on LLP64
FIX2INT does not call to_int where int and long have the same size, so `method(:puts).curry(1r... YO4 (Yoshinao Muramatsu)

10:00 PM Ruby Revision ec3b6b12 (git): [Bug #22284] Fix curry with a non-Fixnum arity on LLP64

FIX2INT does not call to_int where int and long have the same size, so `method(:puts).curry(1r)` waited for a garbage number of arguments on Windows. Convert the arity once and keep the result as a Fixnum, which also limits the to_int ca... YO4 (Yoshinao Muramatsu)

09/24/2026

05:04 AM Ruby Revision 50e2da17 (git): remove unnecessary Inline keyword

Oddly, when building with msvc (19.44), the linking fails only while disabling optimization (using the /Od option).
```
linking miniruby.exe
Creating library miniruby.lib and object miniruby.exp
set.obj : error LNK2019: unresolved ext... YO4 (Yoshinao Muramatsu)

03:33 AM Ruby Revision 98e99961 (git): mswin: avoid using a bitfield basen on enum type

Using the option (one of -std:[c11|c17|clatest]) to enable standard C support in msvc causes the following error:
[BUG] vm_call_method: unsupported method type (-7)
Simply disable it. YO4 (Yoshinao Muramatsu)

03:33 AM Ruby Revision 73481d73 (git): mswin: enable flexible array support for msvc

msvc supports flexible array as it's language extensions.
The /Za msvc compiler option disables this and other extensions, but it is not necessary to consider it.
The Windows SDK headers contain anonymous unions/structs, and using /Za ma... YO4 (Yoshinao Muramatsu)

03:33 AM Ruby Revision b96ef541 (git): Use of explicit parentheses

Apply suggestion from @nobu
Co-authored-by: Nobuyoshi Nakada <nobu.nakada@gmail.com> YO4 (Yoshinao Muramatsu)

09/08/2026

05:44 PM Ruby Bug #20526: File.open(encoding: "bom|utf-8") converts "\r\n" to "\n" on Windows

[GH-18676](https://github.com/ruby/ruby/pull/18676) fixes the first.
Fixing the second requires addressing #21691. YO4 (Yoshinao Muramatsu)

09/02/2026

11:39 AM Ruby Bug #22284: Passing an object with to_int to curry as its arity causes problems with LLP64.

If we want to correct Windows' behavior, the following would be potential patches.
```diff
--- a/proc.c
+++ b/proc.c
@@ -4611,10 +4611,11 @@ proc_curry(int argc, const VALUE *argv, VALUE self)
arity = INT2FIX(min_arity);
... YO4 (Yoshinao Muramatsu)

09/01/2026

12:35 PM Ruby Bug #22285 (Open): FIX2INT loses consistency due to sizeof(int)

In include/ruby/internal/arithmetic/int.h, FIX2INT is resolved to rb_fix2int or RB_FIX2LONG.
```
#define FIX2INT RB_FIX2INT /**< @old{RB_FIX2INT} */
/**
* Converts a Fixnum into C's `int`.
*
* @param[in] x Some F... YO4 (Yoshinao Muramatsu)

12:21 PM Ruby Bug #22284 (Closed): Passing an object with to_int to curry as its arity causes problems with LLP64.

The proc_curry function in proc.c is affected by differences in behavior caused by the int size in FIX2INT.
As a result, depending on the arguments, curry may not function correctly on Windows.
```
method(:puts).curry(1r).call(42)
=>... YO4 (Yoshinao Muramatsu)