[Bug #913](Closed) mathn $B$7$?>l9g!"(Bsqrt(NaN) $B$,J#AG?t$K$J$k(B

Ruby Development
1

e$B%A%1%C%He(B #913 e$B$,99?7$5$l$^$7$?!#e(B (by Yuki S.)

e$B%+%F%4%je(B libe$B$K%;%C%He(B
e$B%9%F!<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B

applied in r20938.

http://redmine.ruby-lang.org/issues/show/913