diff options
Diffstat (limited to 'lib/regcomp.c')
| -rw-r--r-- | lib/regcomp.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/regcomp.c b/lib/regcomp.c index 6e317f5..faa7382 100644 --- a/lib/regcomp.c +++ b/lib/regcomp.c @@ -2138,6 +2138,7 @@ parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token, { re_dfa_t *dfa = (re_dfa_t *) preg->buffer; bin_tree_t *tree, *branch = NULL; + bitset_word_t initial_bkref_map = dfa->completed_bkref_map; tree = parse_branch (regexp, preg, token, syntax, nest, err); if (BE (*err != REG_NOERROR && tree == NULL, 0)) return NULL; @@ -2148,9 +2149,16 @@ parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token, if (token->type != OP_ALT && token->type != END_OF_RE && (nest == 0 || token->type != OP_CLOSE_SUBEXP)) { + bitset_word_t accumulated_bkref_map = dfa->completed_bkref_map; + dfa->completed_bkref_map = initial_bkref_map; branch = parse_branch (regexp, preg, token, syntax, nest, err); if (BE (*err != REG_NOERROR && branch == NULL, 0)) - return NULL; + { + if (tree != NULL) + postorder (tree, free_tree, NULL); + return NULL; + } + dfa->completed_bkref_map |= accumulated_bkref_map; } else branch = NULL; |