diff --git a/.gitignore b/.gitignore
index e0e5c09..d2b6829 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@ cmake-build-*
 
 .vs
 .vscode
+.VSCodeCounter
 CMakeSettings.json
 
 cmake-build/
diff --git a/actrie/__init__.py b/actrie/__init__.py
index b435bd2..2d6c617 100644
--- a/actrie/__init__.py
+++ b/actrie/__init__.py
@@ -5,4 +5,4 @@
 
 __all__ = ['Matcher', 'Context', 'PrefixMatcher']
 
-__version__ = '3.0.6'
+__version__ = '3.0.7'
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index e69de29..0000000
diff --git a/src/matcher.c b/src/matcher.c
index 1c8777a..4c9e07a 100644
--- a/src/matcher.c
+++ b/src/matcher.c
@@ -33,6 +33,12 @@ static void add_pattern_to_matcher(ptrn_t pattern, strlen_t extra, void* arg) {
 
 static void free_expr_list(void* trie, void* node) {
   list_t list = (list_t)node;
+  while (list != NULL) {
+    // NOTE: car of list is expr_t, and it is not aobj!!!
+    list->car = NULL;
+    list = list->cdr;
+  }
+  list = (list_t)node;
   _release(list);
 }
 
@@ -74,8 +80,8 @@ matcher_t matcher_construct_by_string(strlen_t string, bool all_as_plain, bool i
 
 void matcher_destruct(matcher_t matcher) {
   if (matcher != NULL) {
-    reglet_destruct(matcher->reglet);
     dat_destruct(matcher->datrie, (dat_node_free_f)free_expr_list);
+    reglet_destruct(matcher->reglet);
     matcher_free(matcher);
   }
 }