viralpraxis (Iaroslav Kurbatov)

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Assigned issues	0	0	0
Reported issues	0	8	8

12:46 PM Ruby Bug #22181 (Closed): SEGV in branch peephole optimization due to label/insn struct aliasing: Applied in changeset commit:git|6aedc31694f020ee37cd0668779351a714115ad0.
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[Bug #22181] Fix branch-peephole-optimization label & insn ID collisions viralpraxis (Iaroslav Kurbatov)
10:39 AM Ruby Bug #22181 (Closed): SEGV in branch peephole optimization due to label/insn struct aliasing: Both `iseq_label_data` and `iseq_insn_data` share the same layout prefix; in some cases `iseq_label_data->label_no` might collide with `iseq_insn_data->insn_id` (e.g. when there are many (monotonically increasing) label IDs allocated and... viralpraxis (Iaroslav Kurbatov)
12:46 PM Ruby Revision 6aedc316 (git): [Bug #22181] Fix branch-peephole-optimization label & insn ID collisions: viralpraxis (Iaroslav Kurbatov)

09:34 PM Ruby Revision e4c52b41 (git): [Bug #22126] Fix partial DCE with loop back-edges: The old `remove_unreachable_chunk` walked the dead code once and tried
to do two things at the same time -- count label references inside that
chunk and figure out what exactly to delete.
That breaks for loops -- the loop label comes be... viralpraxis (Iaroslav Kurbatov)

03:41 AM Ruby Bug #22126 (Closed): Stack underflow for partial DCE and loops: Applied in changeset commit:git|1f473ed633a364f8c89b69a76adfb22a4bf21f96.
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[Bug #22126] Fix partial DCE with loop back-edges
The old `remove_unreachable_chunk` walked the dead code once and tried
to do two things at the same ... viralpraxis (Iaroslav Kurbatov)
03:40 AM Ruby Revision 1f473ed6 (git): [Bug #22126] Fix partial DCE with loop back-edges: The old `remove_unreachable_chunk` walked the dead code once and tried
to do two things at the same time -- count label references inside that
chunk and figure out what exactly to delete.
That breaks for loops -- the loop label comes be... viralpraxis (Iaroslav Kurbatov)

04:06 PM Ruby Bug #22126 (Closed): Stack underflow for partial DCE and loops: ``` ruby
ruby --parser prism -e 'if []; else; a => [*, 42, *]; end'
-- raw disasm--------
trace: 1
0000 putnil ( 1)
0001 leave ... viralpraxis (Iaroslav Kurbatov)

08:32 AM Ruby Misc #21647: DevMeeting-2025-11-13: * [Feature #21637] tracepoint: add support for global variables read/write events (viralpraxis)
* There seems to be no straightforward way to trace gvar reads/writes in runtime
* `Kernel.trace_var` only works when gvar name is know... viralpraxis (Iaroslav Kurbatov)

04:24 PM Ruby Revision 5d2a244b (git): [Bug #21644] compile.c: fix `newrange` INSN peephole optimization for chilled string: ref: https://bugs.ruby-lang.org/issues/21644
```shell
$ ruby -v -e '("a" || "b").."c"'
ruby 3.4.7 (2025-10-08 revision 7a5688e2a2) +PRISM [x86_64-linux]
-e:1: warning: possibly useless use of .. in void context
-e:1: [BUG] Stack consist... viralpraxis (Iaroslav Kurbatov)
05:17 AM Ruby Bug #21644 (Closed): Stack consistency error for the `newrange` INSN peephole optimization with chilled string: Applied in changeset commit:git|7587e92910e7604a4c66f2b804bfa2076339c6ff.
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[Bug #21644] compile.c: fix `newrange` INSN peephole optimization for chilled string
ref: https://bugs.ruby-lang.org/issues/21644
```shell
$ ruby -v ... viralpraxis (Iaroslav Kurbatov)

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