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-rw-r--r--posix/regcomp.c4
-rw-r--r--posix/rxspencer/tests5
2 files changed, 8 insertions, 1 deletions
diff --git a/posix/regcomp.c b/posix/regcomp.c
index bdd616dfbb..ba7a1cc5d4 100644
--- a/posix/regcomp.c
+++ b/posix/regcomp.c
@@ -1602,7 +1602,9 @@ calc_eclosure_iter (new_set, dfa, node, root)
? 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
+ && !dfa->nodes[dfa->edests[node].elems[0]].duplicated)
{
int org_node, cur_node;
org_node = cur_node = node;
diff --git a/posix/rxspencer/tests b/posix/rxspencer/tests
index f4a3fb3df5..30fff15946 100644
--- a/posix/rxspencer/tests
+++ b/posix/rxspencer/tests
@@ -505,3 +505,8 @@ Char \([a-z0-9_]*\)\[.* b Char xyz[k Char xyz[k xyz
a?b - ab ab
-\{0,1\}[0-9]*$ b -5 -5
a*a*a*a*a*a*a* & aaaaaa aaaaaa
+(\b){0} - x @x -
+\(\b\)\{0,0\} b abc @abc -
+a(\b){0}c - ac ac -
+a(.*)b(\0){0}c - abc abc @bc,-
+a(.*)b(\0){0}c - axbc axbc x,-