[Bug #3459] test_regexp.rb Segmentation fault on x64-mswin64

[shintaro_kuwamoto]

e$B%A%1%C%He(B #3459 e$B$,99?7$5$l$^$7$?!#e(B (by shintaro kuwamoto)

ruby -e"/()/ =~ ‘’"
e$B$G%a%b%j3NJ]<:GT$7$^$9!#e(B
ruby -e"/()/ =~ ’ '"
e$B$J$i2?;v$b$J$/DL$j$^$9!#e(B

http://redmine.ruby-lang.org/issues/show/3459