From: Run Paint Run Run <redmine@...>
Date: 2009-06-14T03:35:12+09:00
Subject: [ruby-core:23840] [Bug #1625] Segfault when NoMethodError is Raised Under IRB with Tracer Option

Bug #1625: Segfault when NoMethodError is Raised Under IRB with Tracer Option
http://redmine.ruby-lang.org/issues/show/1625

Author: Run Paint Run Run
Status: Open, Priority: Normal
ruby -v: ruby 1.9.2dev (2009-06-13 trunk 23682) [i686-linux]

Triggering a NoMethodError under 1.9's IRB with --tracer reproducibly causes a segfault.

$ irb -v
irb 0.9.5(05/04/13)
$ ruby -v
ruby 1.9.2dev (2009-06-13 trunk 23682) [i686-linux]
$ irb --tracer
irb(main):001:0> 1.glark
#0:(irb):1:Object:-: -
#0:(irb):1:BasicObject:>: -
#0:(irb):1:NameError::message:>: -
#0:(irb):1:NameError::message:<: -
#0:(irb):1:NoMethodError:>: -
#0:(irb):1:NameError:>: -
#0:(irb):1:StandardError:>: -
#0:(irb):1:StandardError:<: -
#0:(irb):1:NameError:<: -
#0:(irb):1:NoMethodError:<: -
#0:(irb):1:Exception:>: -
#0:(irb):1:Exception:<: -
#0:(irb):1:Exception:>: -
#0:(irb):1:Exception:<: -
#0:(irb):1:Object:: -
/usr/local/lib/ruby/1.9.1/irb/ext/tracer.rb: [BUG] Segmentation fault
ruby 1.9.2dev (2009-06-13 trunk 23682) [i686-linux]

-- control frame ----------
c:0021 p:0021 s:0075 b:0075 l:0000f4 d:001938 BLOCK 
c:0020 p:0087 s:0072 b:0071 l:0000f4 d:0000f4 METHOD /usr/local/lib/ruby/1.9.1/irb/ext/tracer.rb:50
c:0019 p:0031 s:0064 b:0063 l:000062 d:000062 METHOD /usr/local/lib/ruby/1.9.1/irb/context.rb:218
c:0018 p:0030 s:0058 b:0058 l:000e3c d:000057 BLOCK  /usr/local/lib/ruby/1.9.1/irb.rb:149
c:0017 p:0037 s:0050 b:0050 l:000049 d:000049 METHOD /usr/local/lib/ruby/1.9.1/irb.rb:263
c:0016 p:0011 s:0045 b:0045 l:000e3c d:000044 BLOCK  /usr/local/lib/ruby/1.9.1/irb.rb:146
c:0015 p:0132 s:0041 b:0041 l:000024 d:000040 BLOCK  /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:244
c:0014 p:---- s:0038 b:0038 l:000037 d:000037 FINISH
c:0013 p:---- s:0036 b:0036 l:000035 d:000035 CFUNC  :loop
c:0012 p:0009 s:0033 b:0033 l:000024 d:000032 BLOCK  /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:230
c:0011 p:---- s:0031 b:0031 l:000030 d:000030 FINISH
c:0010 p:---- s:0029 b:0029 l:000028 d:000028 CFUNC  :catch
c:0009 p:0023 s:0025 b:0025 l:000024 d:000024 METHOD /usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:229
c:0008 p:0042 s:0022 b:0022 l:000e3c d:000e3c METHOD /usr/local/lib/ruby/1.9.1/irb.rb:145
c:0007 p:0011 s:0019 b:0019 l:000ec4 d:000018 BLOCK  /usr/local/lib/ruby/1.9.1/irb.rb:69
c:0006 p:---- s:0017 b:0017 l:000016 d:000016 FINISH
c:0005 p:---- s:0015 b:0015 l:000014 d:000014 CFUNC  :catch
c:0004 p:0172 s:0011 b:0011 l:000ec4 d:000ec4 METHOD /usr/local/lib/ruby/1.9.1/irb.rb:68
c:0003 p:0039 s:0006 b:0006 l:002054 d:000044 EVAL   /usr/local/bin/irb:12
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:002054 d:002054 TOP   
---------------------------
/usr/local/bin/irb:12:in `<main>'
/usr/local/lib/ruby/1.9.1/irb.rb:68:in `start'
/usr/local/lib/ruby/1.9.1/irb.rb:68:in `catch'
/usr/local/lib/ruby/1.9.1/irb.rb:69:in `block in start'
/usr/local/lib/ruby/1.9.1/irb.rb:145:in `eval_input'
/usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `each_top_level_statement'
/usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `catch'
/usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:230:in `block in each_top_level_statement'
/usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:230:in `loop'
/usr/local/lib/ruby/1.9.1/irb/ruby-lex.rb:244:in `block (2 levels) in each_top_level_statement'
/usr/local/lib/ruby/1.9.1/irb.rb:146:in `block in eval_input'
/usr/local/lib/ruby/1.9.1/irb.rb:263:in `signal_status'
/usr/local/lib/ruby/1.9.1/irb.rb:149:in `block (2 levels) in eval_input'
/usr/local/lib/ruby/1.9.1/irb/context.rb:218:in `evaluate'
/usr/local/lib/ruby/1.9.1/irb/ext/tracer.rb:50:in `evaluate'
/usr/local/lib/ruby/1.9.1/irb/ext/tracer.rb:0:in `ensure in evaluate'

-- C level backtrace information -------------------------------------------
irb(rb_vm_bugreport+0xb5) [0x81613c5]
irb [0x819c48b]
irb(rb_bug+0x28) [0x819c518]
irb [0x80f6495]
[0xb7f62410]
irb [0x8158b22]
irb [0x815a1c6]
irb(rb_rescue2+0x141) [0x805cd81]
irb [0x814db84]
irb [0x815f429]
irb [0x8151d8e]
irb [0x8158b22]
irb [0x815942c]
irb [0x814d15d]
irb [0x815f429]
irb [0x8151d8e]
irb [0x8158b22]
irb [0x815942c]
irb [0x814d15d]
irb [0x815f429]
irb [0x8151d8e]
irb [0x8158b22]
irb(rb_iseq_eval_main+0x1a3) [0x8158d93]
irb(ruby_exec_node+0x97) [0x805cfe7]
irb(ruby_run_node+0x46) [0x805e8b6]
irb(main+0x60) [0x805c3e0]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7d83775]
irb [0x805c2e1]

[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


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