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Bug #9150

closed

Segfault in case statement execution, possibly related to refinements

Added by bradleybuda (Bradley Buda) over 10 years ago. Updated over 10 years ago.

Status:
Closed
Target version:
-
ruby -v:
ruby 2.0.0p353 (2013-11-22 revision 43783) [x86_64-darwin13.0.0]
[ruby-core:58563]

Description

This code consistently segfaults in 2.0.0p353:

require 'active_support/all'

case 3600
when 1.week then true
end

This is after gem install activesupport --version=3.2.13. The code works fine in 2.0.0p247.

I ran a git bisect between the two patches and I've narrowed it down to this change: https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/42869 . I don't know enough about ruby's internals to debug this any further, but according to LLDB the problem is a null pointer dereference in vm_eval.c:

141 {
142 VALUE ret;
143
144 if (!ci->me->def) return Qnil;
145
146 if (th->passed_block) {
147 ci->blockptr = (rb_block_t *)th->passed_block;

ci->me is null on line 144.

I can reproduce this error on both OSX and Linux. Let me know if I can provide any more info to help debug this.


Related issues 1 (0 open1 closed)

Is duplicate of Backport200 - Backport #8872: Case statements do not honor a refinement of the '===' methodClosednagachika (Tomoyuki Chikanaga)09/07/2013Actions

Updated by zzak (zzak _) over 10 years ago

  • Status changed from Open to Assigned
  • Assignee set to nagachika (Tomoyuki Chikanaga)

Updated by shugo (Shugo Maeda) over 10 years ago

I've not investigated this problem yet, but Matz said implicit method calls should not honor refinements, so r42869 might be an undesirable change.

Updated by nagachika (Tomoyuki Chikanaga) over 10 years ago

  • Status changed from Assigned to Closed

duplicated. please move to #8872

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