From: Run Paint Run Run <redmine@...>
Date: 2009-08-06T15:29:18+09:00
Subject: [ruby-core:24789] [Bug #1896] Segfault for Method#== with :send

Bug #1896: Segfault for Method#== with :send
http://redmine.ruby-lang.org/issues/show/1896

Author: Run Paint Run Run
Status: Open, Priority: Normal
Category: core
ruby -v: ruby 1.9.2dev (2009-08-05 trunk 24397) [i686-linux]

I get a segfault with the following on 1.9. Same with :__send__. Works on 1.8.

  $ cat /tmp/segfault.rb 
  String.instance_method(:send) == String.instance_method(:send)
  $ ruby /tmp/segfault.rb

  Aborted
  /tmp/segfault.rb:1: [BUG] rb_add_method: unsupported method type (8)

  ruby 1.9.2dev (2009-08-05 trunk 24397) [i686-linux]

  -- control frame ----------
  c:0004 p:---- s:0010 b:0010 l:000009 d:000009 CFUNC  :==
  c:0003 p:0034 s:0006 b:0006 l:002074 d:001f6c EVAL   /tmp/segfault.rb:1
  c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
  c:0001 p:0000 s:0002 b:0002 l:002074 d:002074 TOP   
  ---------------------------
  /tmp/segfault.rb:1:in `<main>'
  /tmp/segfault.rb:1:in `=='

  -- C level backtrace information -------------------------------------------
  ruby(rb_vm_bugreport+0xb5) [0x8166ac5]
  ruby [0x81a283b]
  ruby(rb_bug+0x28) [0x81a28c8]
  ruby(rb_method_entry_eq+0x2d) [0x8151cfd]
  ruby [0x8062316]
  ruby [0x8152c27]
  ruby [0x81633d5]
  ruby [0x8159ccf]
  ruby [0x815dde2]
  ruby(rb_iseq_eval_main+0x1a3) [0x815e043]
  ruby(ruby_exec_node+0x97) [0x805d6d7]
  ruby(ruby_run_node+0x46) [0x805efb6]
  ruby(main+0x60) [0x805caf0]
  /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7d26775]
  ruby [0x805c9f1]

  [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


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