--- a/th_regex.c	Sun Apr 26 23:34:21 2020 +0300
+++ b/th_regex.c	Mon Apr 27 00:11:28 2020 +0300
@@ -196,13 +196,15 @@
 
 static int th_regex_parse_ctx_node_commit(th_regex_parse_ctx_t *ctx, th_regex_node_t *node)
 {
-    th_regex_t *data = ctx->data;
+    th_regex_t *data;
 
-    if (data == NULL)
+    if (ctx->data == NULL)
     {
         if ((data = ctx->data = th_malloc0(sizeof(th_regex_t))) == NULL)
             return THERR_MALLOC;
     }
+    else
+        data = ctx->data;
 
     if (data->nodes == NULL || data->nnodes + 1 >= data->nodessize)
     {
@@ -730,6 +732,7 @@
         {
             th_regex_node_t *node = &expr->nodes[nnode];
 
+            th_free(node->match.str);
             th_regex_free(node->match.expr);
             th_regex_list_free(&node->match.list);
         }