Issue #5391 has been reported by Tomoyuki Chikanaga.

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Backport #5391: Please backport r33368,  r33379 (ref #5380)
http://redmine.ruby-lang.org/issues/5391

Author: Tomoyuki Chikanaga
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 


Please backport r33368,  r33379 (ref #5380).
Especially r33368 is fix for SEGV introduced at 1.9.3.


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