[Bug #2388](Rejected) test-all 中に popen で ruby.exe が落ちる

e$B%A%1%C%He(B #2388 e$B$,99?7$5$l$^$7$?!#e(B (by _ wanabe)

e$B%9%F!<%?%9e(B Feedbacke$B$+$ie(BRejectede$B$KJQ99e(B

e$B$9$_$^$;$s$,0lC6e(B Reject e$B$5$;$F$$$?$@$-$^$9!#e(B
e$B$b$7:F8=$G$-$?J}$,$$$i$C$7$c$C$?$i$=$N$H$-$Ke(B reopen
e$B$r$*4j$$$$$?$7$^$9!#e(B

http://redmine.ruby-lang.org/issues/show/2388