From: Guido van Rossum <guido@python.org>
Date: Fri, 20 Feb 1998 21:45:14 +0000 (+0000)
Subject: A bug in PCRE could cause core dumps in patterns such as
X-Git-Tag: v1.5.1~610
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d0f432b8407d4637a9b9044046f7a186ed7dff64;p=python

A bug in PCRE could cause core dumps in patterns such as
'((a)*)*'. Andrew Kuchling posted a fix to the string-sig.
---

diff --git a/Modules/pypcre.c b/Modules/pypcre.c
index 1d2a9cade7..69d6c221b1 100644
--- a/Modules/pypcre.c
+++ b/Modules/pypcre.c
@@ -809,6 +809,13 @@ do {
       case OP_KETRMIN:
       return TRUE;
 
+      /* Skip over entire bracket groups with zero lower bound */
+
+      case OP_BRAZERO:
+      case OP_BRAMINZERO:
+      cc++;
+      /* Fall through */
+
       /* Skip over assertive subpatterns */
 
       case OP_ASSERT:
@@ -823,8 +830,6 @@ do {
       case OP_EOD:
       case OP_CIRC:
       case OP_DOLL:
-      case OP_BRAZERO:
-      case OP_BRAMINZERO:
       case OP_NOT_WORD_BOUNDARY:
       case OP_WORD_BOUNDARY:
       case OP_NOT_WORD_BOUNDARY_L: