From: Neal Norwitz <nnorwitz@gmail.com>
Date: Sun, 23 Jul 2006 07:51:58 +0000 (+0000)
Subject: If the for loop isn't entered, entryblock will be NULL.  If passed
X-Git-Tag: v2.5b3~197
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f71847e6459c4103189b705fd654cf1485d11b2a;p=python

If the for loop isn't entered, entryblock will be NULL.  If passed
to stackdepth_walk it will be dereffed.

Not sure if I found with failmalloc or Klockwork #55.
---

diff --git a/Python/compile.c b/Python/compile.c
index 564df18473..5ed9893c80 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -4022,6 +4022,8 @@ stackdepth(struct compiler *c)
 		b->b_startdepth = INT_MIN;
 		entryblock = b;
 	}
+	if (!entryblock)
+		return 0;
 	return stackdepth_walk(c, entryblock, 0, 0);
 }