[ruby-core:38454] [Ruby 1.9 - Bug #5090] Segfault using Enumerator

Issue #5090 has been updated by Robert Syme.


$ gdb --args ruby bug_report.rb bug_report.rb bug_report.rb
GNU gdb (GDB) Red Hat Enterprise Linux (7.0.1-32.el5_6.2)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/bin/ruby...(no debugging symbols found)...done.
(gdb) run
Starting program: /home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/bin/ruby bug_report.rb bug_report.rb bug_report.rb
[Thread debugging using libthread_db enabled]
[New Thread 0x40003940 (LWP 15263)]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7ffa850 in ?? ()
(gdb) bt
#0  0x00007ffff7ffa850 in ?? ()
#1  0x000000000076fdd0 in ?? ()
#2  0x00000000029ea4c3 in ?? ()
#3  0x00007ffff7863e20 in ?? () from /home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9
#4  0x0000000000553418 in ?? ()
#5  0x0000000000772920 in ?? ()
#6  0x00000000006473d8 in ?? ()
#7  0x000000000076fdd0 in ?? ()
#8  0x00000000006473f0 in ?? ()
#9  0x00007ffff785e000 in ?? ()
#10 0x0000000000000000 in ?? ()

----------------------------------------
Bug #5090: Segfault using Enumerator
http://redmine.ruby-lang.org/issues/5090

Author: Robert Syme
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: 
ruby -v: ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-linux] 


Running bug_report.rb on my laptop simply raises a StopIteration as expected, but running it on a compute cluster node (Intel Xeon 2.93 GHz - Nehalem series) generates a segfault (below, and in "gcc and output.txt" when getting the next element from an Enumerator.
Ruby was compiled as described in configure.log and make.log


$ ruby bug_report.rb  bug_report.rb  bug_report.rb 
bug_report.rb:6: [BUG] Segmentation fault
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-linux]

-- control frame ----------
c:0009 p:---- s:0027 b:0027 l:000050 d:000050 CFUNC  :next
c:0008 p:0011 s:0024 b:0024 l:0006c8 d:000023 BLOCK  bug_report.rb:6
c:0007 p:---- s:0019 b:0019 l:000018 d:000018 FINISH
c:0006 p:---- s:0017 b:0017 l:0021d0 d:0021d0 CFUNC  :each
c:0005 p:---- s:0015 b:0015 l:000014 d:000014 CFUNC  :each
c:0004 p:---- s:0013 b:0013 l:002100 d:002100 CFUNC  :count
c:0003 p:0104 s:0010 b:0009 l:0006c8 d:001920 EVAL   bug_report.rb:18
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:0006c8 d:0006c8 TOP   
---------------------------
-- Ruby level backtrace information ----------------------------------------
bug_report.rb:18:in `<main>'
bug_report.rb:18:in `count'
bug_report.rb:18:in `each'
bug_report.rb:18:in `each'
bug_report.rb:6:in `block in <main>'
bug_report.rb:6:in `next'

-- C level backtrace information -------------------------------------------
/home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_vm_bugreport+0x66) [0x7ffff7a8fde6]
/home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_bug+0x189) [0x7ffff79087f9]
/home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9 [0x7ffff79f55fe]
/lib64/libpthread.so.0 [0x7ffff7651b10]
[0x7ffff7ffa850]

[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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