Forum: Ruby-core [Ruby 1.8 - Bug #6383][Open] Segfault in Timeout module when compiled with GCC 4.7

Issue #6383 has been reported by budu (Nicolas Buduroi).

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Bug #6383: Segfault in Timeout module when compiled with GCC 4.7
https://bugs.ruby-lang.org/issues/6383

Author: budu (Nicolas Buduroi)
Status: Open
Priority: High
Assignee:
Category:
Target version: Ruby 1.8.7
ruby -v: ruby 1.8.7 (2012-02-08 patchlevel 358) [i686-linux]


As described in a post 
(https://bbs.archlinux.org/viewtopic.php?id=139547) on the ArchLinux 
forum, there's an issue with Ruby 1.8.7 when compiled with GCC 4.7 on a 
modern Linux system. Ruby segfault as soon as we try to install a gem, 
although it seems to work fine for trivial things. Here's an output of 
the error message:

/opt/ruby1.8/lib/ruby/1.8/timeout.rb:60: [BUG] Segmentation fault
ruby 1.8.7 (2012-02-08 patchlevel 358) [i686-linux]

It can be circumvented by installing older versions of GCC but this is a 
very time consuming operation and it's not possible one every systems.

Issue #6383 has been updated by phasis68 (Heesob Park).


I can reproduce this issue on Arch Linux 3.3.4.

I guess the over-optimization of GCC 4.7 caused the segfault.

Try to build Ruby 1.8.7 with the following config options:
./configure CFLAGS="-O2 -fno-tree-dce -fno-optimize-sibling-calls"

Don't ask me why. I just found it by trial and error.

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Bug #6383: Segfault in Timeout module when compiled with GCC 4.7
https://bugs.ruby-lang.org/issues/6383#change-26442

Author: budu (Nicolas Buduroi)
Status: Open
Priority: High
Assignee:
Category:
Target version: Ruby 1.8.7
ruby -v: ruby 1.8.7 (2012-02-08 patchlevel 358) [i686-linux]


As described in a post 
(https://bbs.archlinux.org/viewtopic.php?id=139547) on the ArchLinux 
forum, there's an issue with Ruby 1.8.7 when compiled with GCC 4.7 on a 
modern Linux system. Ruby segfault as soon as we try to install a gem, 
although it seems to work fine for trivial things. Here's an output of 
the error message:

/opt/ruby1.8/lib/ruby/1.8/timeout.rb:60: [BUG] Segmentation fault
ruby 1.8.7 (2012-02-08 patchlevel 358) [i686-linux]

It can be circumvented by installing older versions of GCC but this is a 
very time consuming operation and it's not possible one every systems.