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Bug #9150

closed

Segfault in case statement execution, possibly related to refinements

Added by bradleybuda (Bradley Buda) almost 11 years ago. Updated almost 11 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
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