1 files changed, 2 insertions, 0 deletions
diff --git a/cont.c b/cont.c
index 314340ec37..256ae378ba 100644
--- a/cont.c
+++ b/cont.c
@@ -1110,6 +1110,8 @@ return_fiber(void)
 	fib->prev = Qnil;
 	return prev;
     }
+
+    UNREACHABLE;
 }
 
 VALUE rb_fiber_transfer(VALUE fib, int argc, VALUE *argv);