From 9cb58a2252d25f81346ae3d4eefb1775d9ed548b Mon Sep 17 00:00:00 2001 From: "Yukihiro \"Matz\" Matsumoto" Date: Sun, 20 Oct 2013 00:43:39 +0900 Subject: Fixnum#succ may overflow --- src/numeric.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/numeric.c b/src/numeric.c index c309abf89..1cb47a8f2 100644 --- a/src/numeric.c +++ b/src/numeric.c @@ -710,7 +710,11 @@ int_to_i(mrb_state *mrb, mrb_value num) static mrb_value fix_succ(mrb_state *mrb, mrb_value num) { - return mrb_fixnum_value(mrb_fixnum(num)+1); + mrb_int x = mrb_fixnum(num); + + if (x == MRB_INT_MAX) /* fixnum overflow */ + return mrb_float_value(mrb, (double)x + 1.0); + return mrb_fixnum_value(x+1); } /* 15.2.8.3.19 */ -- cgit v1.2.3