eval.c: check tag value

* eval.c (rb_jump_tag): paranoiac check of tag value.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51295 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index 8c8ac947f6..69a15d9985 100644
--- a/eval.c
+++ b/eval.c
@@ -755,6 +755,9 @@ rb_raise_jump(VALUE mesg, VALUE cause)
 void
 rb_jump_tag(int tag)
 {
+    if (UNLIKELY(tag < TAG_RETURN || tag > TAG_FATAL)) {
+	unknown_longjmp_status(tag);
+    }
     JUMP_TAG(tag);
 }