Issue #2485 has been updated by Usaku NAKAMURA. OK, I've found the point and the solution. It's already fixed on ruby_1_8 branch, but not backported to ruby_1_8_7. (ruby_1_8_6 seems to be no problem.) Shyouhei, can you backport r22931 and r23086? ---------------------------------------- http://redmine.ruby-lang.org/issues/show/2485 ---------------------------------------- http://redmine.ruby-lang.org