* io.c (rb_io_gets_m): set lastline ($_) even when read line is

  nil.  [ruby-dev:23663]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6427 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 1 deletions

diff --git a/bignum.c b/bignum.c
index 31a5f58c24..510860c03c 100644
--- a/bignum.c
+++ b/bignum.c
@@ -982,10 +982,11 @@ rb_big_eq(x, y)
 	break;
       case T_FLOAT:
         {
-	    double a, b;
+	    volatile double a, b;
 
 	    a = RFLOAT(y)->value;
 	    b = rb_big2dbl(x);
+	    if (isnan(a) || isnan(b)) return Qfalse;
 	    return (a == b)?Qtrue:Qfalse;
 	}
       default: