regcomp: propagate allocation failures

The error code of an allocating function was not checked in tre_add_tag.

diff --git a/src/regex/regcomp.c b/src/regex/regcomp.c
index 978dd87f33912d7c097e3cc281bd1479070d7e99..330de46759730b55b90d9080fb7798d37ae5db86 100644 (file)
--- a/src/regex/regcomp.c
+++ b/src/regex/regcomp.c
@@ -1584,7 +1584,8 @@ tre_add_tags(tre_mem_t mem, tre_stack_t *stack, tre_ast_node_t *tree,
                  {
                    status = tre_add_tag_right(mem, left, tag_left);
                    tnfa->tag_directions[tag_left] = TRE_TAG_MAXIMIZE;
-                   status = tre_add_tag_right(mem, right, tag_right);
+                   if (status == REG_OK)
+                     status = tre_add_tag_right(mem, right, tag_right);
                    tnfa->tag_directions[tag_right] = TRE_TAG_MAXIMIZE;
                  }
                num_tags += 2;