[Backport92 - Backport #5289][Open] backport #5279 into ruby1.9.2

Ruby Development
1

Issue #5289 has been reported by Shota F…

Backport #5289: backport #5279 into ruby1.9.2

Author: Shota F.
Status: Open
Priority: Normal
Assignee: Yuki S.
Category:
Target version:

この問題は1.9.2でも再現するようなので，r33201 のバックポートをお願いします．