From: Run Paint Run Run <redmine@...>
Date: 2009-06-01T06:16:20+09:00
Subject: [ruby-core:23651] [Bug #1548] Segfault when Transferring to a Fiber which Resumes Itself

Bug #1548: Segfault when Transferring to a Fiber which Resumes Itself
http://redmine.ruby-lang.org/issues/show/1548

Author: Run Paint Run Run
Status: Open, Priority: High
ruby -v: ruby 1.9.2dev (2009-05-28 trunk 23601) [i686-linux]

On both the trunk version and 1.9.1 I can reproduce a segfault by transferring to a Fiber from the root Fiber, when the former attempts to resume itself. Both stack traces below were generated from binaries I compiled myself using the default flags.

  $ rubybleed -rfiber -e 'f=Fiber.new{f.resume};f.transfer'
  [BUG] Segmentation fault
  ruby 1.9.2dev (2009-05-28 trunk 23601) [i686-linux]

  -- control frame ----------
  c:0001 p:---- s:0001 b:-001 l:000000 d:000000 ------
  ---------------------------
  
  -- C level backtrace information -------------------------------------------
  rubybleed(rb_vm_bugreport+0xb5) [0x8160615]
  rubybleed [0x819b51b]
  rubybleed(rb_bug+0x28) [0x819b5a8]
  rubybleed [0x80f5645]
  [0xb7f04410]
  rubybleed [0x805f0c1]
  rubybleed [0x805f503]
  rubybleed [0x819bae5]
  rubybleed(rb_fiber_transfer+0xfb) [0x816934b]
  rubybleed(rb_fiber_start+0x147) [0x81694b7]
  rubybleed [0x805cfde]
  rubybleed(ruby_run_node+0x46) [0x805e8a6]
  rubybleed(main+0x60) [0x805c3d0]
  /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7d25775]
  rubybleed [0x805c2d1]

  [NOTE]
  You may have encountered a bug in the Ruby interpreter or extension libraries.
  Bug reports are welcome.
  For details: http://www.ruby-lang.org/bugreport.html

  Aborted


  $ ruby91 -rfiber -e 'f=Fiber.new{f.resume};f.transfer'
  [BUG] Segmentation fault
  ruby 1.9.1p154 (2009-05-22 revision 23541) [i686-linux]

  -- control frame ----------
  c:0001 p:---- s:0001 b:-001 l:000000 d:000000 ------
  ---------------------------
  -- Ruby level backtrace information-----------------------------------------

  -- C level backtrace information -------------------------------------------
  0x812d908 ruby91(rb_vm_bugreport+0x48) [0x812d908]
  0x815bed1 ruby91 [0x815bed1]
  0x815bf48 ruby91(rb_bug+0x28) [0x815bf48]
  0x80d90b6 ruby91 [0x80d90b6]
  0xb8048410 [0xb8048410]
  0x805cd49 ruby91 [0x805cd49]
  0x805d113 ruby91 [0x805d113]
  0x815b2bf ruby91 [0x815b2bf]
  0x8133dcb ruby91(rb_fiber_transfer+0xfb) [0x8133dcb]
  0x8133f9b ruby91(rb_fiber_start+0x14b) [0x8133f9b]
  0x805d386 ruby91 [0x805d386]
  0x805e8a6 ruby91(ruby_run_node+0x46) [0x805e8a6]
  0x805bea0 ruby91(main+0x60) [0x805bea0]
  0xb7e69775 /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7e69775]
  0x805bda1 ruby91 [0x805bda1]

  [NOTE]
  You may encounter a bug of Ruby interpreter. Bug reports are welcome.
  For details: http://www.ruby-lang.org/bugreport.html

  Aborted


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