visited

1 files changed, 4 insertions, 14 deletions

diff --git a/src/visited.rs b/src/visited.rs
index c9b27bf..178bfe1 100644
--- a/src/visited.rs
+++ b/src/visited.rs
@@ -1,20 +1,11 @@
 use std::path::PathBuf;
 
-#[derive(Clone, Debug)]
+#[derive(Default)]
 pub struct History {
     pub visited: Vec<PathBuf>,
     pub index: usize,
 }
 
-impl Default for History {
-    fn default() -> Self {
-        Self {
-            visited: vec![],
-            index: 0,
-        }
-    }
-}
-
 impl History {
     pub fn push(&mut self, path: &PathBuf) {
         if !self.visited.contains(path) {
@@ -23,10 +14,6 @@ impl History {
         }
     }
 
-    pub fn pop(&mut self) -> Option<PathBuf> {
-        self.visited.pop()
-    }
-
     pub fn is_empty(&self) -> bool {
         self.visited.is_empty()
     }
@@ -62,6 +49,9 @@ impl History {
     }
 
     pub fn drop_queue(&mut self) {
+        if self.is_empty() {
+            return;
+        }
         let final_length = self.len() - self.index;
         self.visited.truncate(final_length);
         if self.is_empty() {