diff --git a/README.md b/README.md
index f92473f7f1513e06476eec62bf2ad4cba5a63e6c..b2b8477bb69f6c2f5524c21f8348d54cf1173b13 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ Todo:
  - [ ] rewrite VSCode-textmate with Rust
     - [ ] makefile
     - [ ] json
+    - [ ] external
  - [ ] languages main support
     - [ ] html
     - [ ] lua
diff --git a/scie-grammar/src/grammar/stack_element.rs b/scie-grammar/src/grammar/stack_element.rs
index b649c4ec41fead819115f07b22d292dc9da2352b..98247a83c701e4251c871bf1f98ea9ab863ed024 100644
--- a/scie-grammar/src/grammar/stack_element.rs
+++ b/scie-grammar/src/grammar/stack_element.rs
@@ -112,24 +112,22 @@ impl StackElement {
     }
 
     pub fn reset(&mut self) {
-        let mut has_parent = true;
         if let None = self.parent {
-            has_parent = false;
             self.enter_pos = -1;
             self.anchor_pos = -1;
         }
 
-        while has_parent {
-            self.enter_pos = -1;
-            self.anchor_pos = -1;
-
-            if let None = self.parent {
-                has_parent = false;
-            } else {
-                // todo: check parent not null
-                // self = self.parent.unwrap().borrow_mut();
-                self.parent = None;
-            }
-        }
+        // while has_parent {
+        //     self.enter_pos = -1;
+        //     self.anchor_pos = -1;
+        //
+        //     if let None = self.parent {
+        //         has_parent = false;
+        //     } else {
+        //         // todo: check parent not null
+        //         // self = self.parent.unwrap().borrow_mut();
+        //         self.parent = None;
+        //     }
+        // }
     }
 }