diff --git a/crates/loro-core/src/container/text/text_container.rs b/crates/loro-core/src/container/text/text_container.rs
index 022701b7..4f481eef 100644
--- a/crates/loro-core/src/container/text/text_container.rs
+++ b/crates/loro-core/src/container/text/text_container.rs
@@ -186,7 +186,6 @@ impl Container for TextContainer {
             format!("{:?}", self.head).red(),
             format!("{:?}", latest_head).red(),
         );
-        dbg!(&self.tracker);
         for effect in self.tracker.iter_effects(path.right) {
             debug_log!("EFFECT: {:?}", &effect);
             match effect {
diff --git a/crates/loro-core/src/fuzz.rs b/crates/loro-core/src/fuzz.rs
index 8350a2f2..c2a781da 100644
--- a/crates/loro-core/src/fuzz.rs
+++ b/crates/loro-core/src/fuzz.rs
@@ -318,20 +318,19 @@ mod test {
             2,
             vec![
                 Ins {
-                    content: "a".into(),
-                    pos: 14072811359363267,
+                    content: "12345".into(),
+                    pos: 6447834,
                     site: 0,
                 },
-                Sync { from: 186, to: 187 },
                 Ins {
-                    content: "b".into(),
-                    pos: 1374464008290728467,
-                    site: 19,
+                    content: "x".into(),
+                    pos: 17753860855744831232,
+                    site: 115,
                 },
-                Ins {
-                    content: "c".into(),
-                    pos: 3175903134871683258,
-                    site: 186,
+                Del {
+                    pos: 18335269204214833762,
+                    len: 52354349510255359,
+                    site: 0,
                 },
             ],
         )
diff --git a/crates/loro-core/src/macros.rs b/crates/loro-core/src/macros.rs
index 7489e079..6faeba10 100644
--- a/crates/loro-core/src/macros.rs
+++ b/crates/loro-core/src/macros.rs
@@ -25,13 +25,13 @@ macro_rules! fx_map {
 macro_rules! debug_log {
     () => {
         if cfg!(test) {
-            $crate::print!("\n")
+            //     $crate::print!("\n")
         }
     };
     ($($arg:tt)*) => {{
         if cfg!(test) {
-            print!("{}:{}\t", file!(), line!());
-            println!($($arg)*);
+            // print!("{}:{}\t", file!(), line!());
+            // println!($($arg)*);
         }
     }};
 }
diff --git a/crates/rle/src/rle_trait.rs b/crates/rle/src/rle_trait.rs
index 088e7294..8d4e5901 100644
--- a/crates/rle/src/rle_trait.rs
+++ b/crates/rle/src/rle_trait.rs
@@ -107,8 +107,8 @@ impl<T: HasLength + Sliceable, A: Array<Item = T>> Sliceable for SmallVec<A> {
         for item in self.iter() {
             if index < to && from < index + item.content_len() {
                 let start = if index < from { from - index } else { 0 };
-                let len = item.content_len().min(to - index);
-                ans.push(item.slice(start, from + len));
+                let len = (item.content_len() - start).min(to - index);
+                ans.push(item.slice(start, start + len));
             }
 
             index += item.content_len();