Fixed negative lookahead/lookbehind. Closes bug #115618.

Fredrik Lundh · Fredrik Lundh · commit 65d4bc616aa9 · 2000-10-03T16:29:23.000Z
diff --git a/Lib/test/re_tests.py b/Lib/test/re_tests.py
@@ -615,4 +615,6 @@
     # bug 112468
     ('(', '', SYNTAX_ERROR),
     ('[\\41]', '!', SUCCEED, 'found', '!'),
+    # bug 115618
+    (r'(?<!abc)(d.f)', 'abcdefdof', SUCCEED, 'found', 'dof'),
 ]
diff --git a/Modules/_sre.c b/Modules/_sre.c
@@ -20,6 +20,7 @@
  * 2000-09-02 fl  return -1 instead of None for start/end/span
  * 2000-09-20 fl  added expand method
  * 2000-09-21 fl  don't use the buffer interface for unicode strings
+ * 2000-10-03 fl  fixed assert_not primitive
  *
  * Copyright (c) 1997-2000 by Secret Labs AB.  All rights reserved.
  *
@@ -774,8 +775,6 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
             i = SRE_MATCH(state, pattern + 2, level + 1);
             if (i <= 0)
                 return i;
-            if (pattern[1] > 0 && state->ptr != ptr)
-                return SRE_ERROR_STATE;
             pattern += pattern[0];
             break;
 
@@ -791,8 +790,6 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
                 return i;
             if (i)
                 return 0;
-            if (pattern[1] > 0 && state->ptr != ptr)
-                return SRE_ERROR_STATE;
             pattern += pattern[0];
             break;
 

Original file line number	Diff line number	Diff line change
`@@ -615,4 +615,6 @@`
`615`	`615`	`# bug 112468`
`616`	`616`	`('(', '', SYNTAX_ERROR),`
`617`	`617`	`('[\\41]', '!', SUCCEED, 'found', '!'),`
	`618`	`+ # bug 115618`
	`619`	`+ (r'(?<!abc)(d.f)', 'abcdefdof', SUCCEED, 'found', 'dof'),`
`618`	`620`	`]`