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The pattern "(\\b){0}" causes regcomp to crash.
Andreas.
2004-11-10 Andreas Schwab <schwab@suse.de>
* posix/regcomp.c (calc_eclosure_iter): Handle empty node set.
* posix/bug-regex13.c: Test this.
--- posix/bug-regex13.c.~1.4.~ 2003-12-22 07:45:54.000000000 +0100
+++ posix/bug-regex13.c 2004-11-10 01:09:32.919431378 +0100
@@ -61,6 +61,8 @@ static struct
{RE_SYNTAX_POSIX_EXTENDED, "ab{0}+c", "ac", 0},
{RE_SYNTAX_POSIX_EXTENDED, "ab{0}+c", "abc", -1},
{RE_SYNTAX_POSIX_EXTENDED, "ab{0}+c", "abbc", -1},
+ /* This used to crash. */
+ {RE_SYNTAX_POSIX_EXTENDED, "(\\b){0}", "a", 0},
};
int
--- posix/regcomp.c.~1.83.~ 2004-11-09 23:20:39.000000000 +0100
+++ posix/regcomp.c 2004-11-10 01:10:08.968244251 +0100
@@ -1602,7 +1602,8 @@ calc_eclosure_iter (new_set, dfa, node,
? dfa->nodes[node].opr.ctx_type : 0);
/* If the current node has constraints, duplicate all nodes.
Since they must inherit the constraints. */
- if (constraint && !dfa->nodes[dfa->edests[node].elems[0]].duplicated)
+ if (constraint && dfa->edests[node].nelem != 0
+ && !dfa->nodes[dfa->edests[node].elems[0]].duplicated)
{
int org_node, cur_node;
org_node = cur_node = node;
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, MaxfeldstraÃe 5, 90409 NÃrnberg, Germany
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
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