add UNREACHABLE_RETURN

Not every compilers understand that rb_raise does not return.  When a
function does not end with a return statement, such compilers can issue
warnings.  We would better tell them about reachabilities.

1 files changed, 1 insertions, 0 deletions

diff --git a/numeric.c b/numeric.c
index f0c45fa6ce..b883b30440 100644
--- a/numeric.c
+++ b/numeric.c
@@ -4013,6 +4013,7 @@ fix_pow_inverted(VALUE x, VALUE minusb)
 {
     if (x == INT2FIX(0)) {
         rb_num_zerodiv();
+        UNREACHABLE_RETURN(Qundef);
     }
     else {
         VALUE y = rb_int_pow(x, minusb);