Restore previous group start after a failed non-capturing group (#4002)

Fixes #3934. JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai daniel.batyai@h-lab.eu
2020-07-20 12:47:45 +02:00
parent f6cde17bfb
commit c2bfdde806
2 changed files with 21 additions and 0 deletions
@@ -694,6 +694,7 @@ ecma_regexp_run (ecma_regexp_ctx_t *re_ctx_p, /**< RegExp matcher context */
        group_p->subcapture_start = re_get_value (&bc_p);
        group_p->subcapture_count = re_get_value (&bc_p);

+        const lit_utf8_byte_t *const saved_begin_p = group_p->begin_p;
        const uint32_t saved_iterator = group_p->iterator;
        const uint32_t qmin = re_get_value (&bc_p);

@@ -720,6 +721,7 @@ ecma_regexp_run (ecma_regexp_ctx_t *re_ctx_p, /**< RegExp matcher context */

        if (matched_p == NULL)
        {
+          group_p->begin_p = saved_begin_p;
          goto fail;
        }