Bug #20772: Test with -O3 is flaky

• Status: Open
• Assignee: -
• Target version: -
• Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN

[hsbt (Hiroshi SHIBATA)]

I enabled -O3 build and those tests. But it failed with flaky status.

https://github.com/ruby/ruby/actions/runs/11098648054/job/30831665071#step:6:2439

[251/251] 53150=test_range
    worker 53144=test_euc_jp does not respond; SEGV is sent
  /github/workspace/src/tool/lib/test/unit/parallel.rb:82: [BUG] Segmentation fault at 0x000000000000cf93
  ruby 3.4.0dev (2024-09-30T03:03:02Z master 3fe59b04d6) +PRISM [x86_64-linux]
  
  -- Control frame information -----------------------------------------------
  c:0009 p:---- s:0055 e:000054 CFUNC  :close
    me:
      called_id: close, type: cfunc
      owner class: IO
    self: (IO)
  c:0008 p:0039 s:0051 e:000050 RESCUE /github/workspace/src/tool/lib/test/unit/parallel.rb:82
    me:
      called_id: _run_suite, type: iseq
      owner class: Test::Unit::Worker
    self: (Test::Unit::Worker)len:31 ptr:0x000056195a0f4d20
    lvars:
      $!: (ThreadError)(embed) len:3
  c:0007 p:0296 s:0047 E:002530 METHOD /github/workspace/src/tool/lib/test/unit/parallel.rb:83
    me:
      called_id: _run_suite, type: iseq
      owner class: Test::Unit::Worker
    self: (Test::Unit::Worker)len:31 ptr:0x000056195a0f4d20
    lvars:
      suite: TestEUC_JP
      type: T_SYMBOL test
      orig_testout: (IO)
      i: (IO)
      o: (IO)
      orig_stdin: (IO)
      orig_stdout: (IO)
      th: T_NIL
      e: T_NIL
      f: T_NIL
      s: T_NIL
      result: T_NIL
  c:0006 p:0007 s:0030 e:000029 BLOCK  /github/workspace/src/tool/lib/test/unit/parallel.rb:24 [FINISH]
    me:
      called_id: _run_suites, type: iseq
      owner class: Test::Unit::Worker
    self: (Test::Unit::Worker)len:31 ptr:0x000056195a0f4d20
    lvars:
      suite: TestEUC_JP
  c:0005 p:---- s:0026 e:000025 CFUNC  :map
    me:
      called_id: map, type: cfunc
      owner class: Array
    self: (Array)[E ] len: 1 (embed)
  c:0004 p:0005 s:0022 e:000021 METHOD /github/workspace/src/tool/lib/test/unit/parallel.rb:23
    me:
      called_id: _run_suites, type: iseq
      owner class: Test::Unit::Worker
    self: (Test::Unit::Worker)len:31 ptr:0x000056195a0f4d20
    lvars:
      suites: (Array)[E ] len: 1 (embed)
      type: T_SYMBOL test
  c:0003 p:0210 s:0016 E:0011d0 METHOD /github/workspace/src/tool/lib/test/unit/parallel.rb:122
    me:
      called_id: run, type: iseq
      owner class: Test::Unit::Worker
    self: (Test::Unit::Worker)len:31 ptr:0x000056195a0f4d20
    lvars:
      args: [E ] len: 0 (embed)
      buf: (String) len: 60, capa: 135 "run /github/workspace/src/test/ruby/enc/test_euc_jp.rb test
  "
      suites: (Array)[E ] len: 59 (embed)
      err: T_NIL
      e: T_NIL
      trace: T_NIL
  c:0002 p:0051 s:0006 E:001360 EVAL   /github/workspace/src/tool/lib/test/unit/parallel.rb:220 [FINISH]
    self: (embed) len:3
  c:0001 p:0000 s:0003 E:000d50 DUMMY  [FINISH]
    self: (embed) len:3
(snip)