Use truncate instead

Hendrik van Antwerpen · Hendrik van Antwerpen · commit 3696992ed06c · 2023-11-14T17:29:36.000+01:00
diff --git a/stack-graphs/src/arena.rs b/stack-graphs/src/arena.rs
@@ -185,8 +185,7 @@ impl<T> Arena<T> {
     /// the arena are invalid.
     #[inline(always)]
     pub fn clear(&mut self) {
-        self.items.clear();
-        self.items.push(MaybeUninit::uninit());
+        self.items.truncate(1);
     }
 
     /// Adds a new instance to this arena, returning a stable handle to it.
@@ -292,8 +291,7 @@ impl<H, T> SupplementalArena<H, T> {
     /// all previous handles into the arena are invalid.
     #[inline(always)]
     pub fn clear(&mut self) {
-        self.items.clear();
-        self.items.push(MaybeUninit::uninit());
+        self.items.truncate(1);
     }
 
     /// Creates a new, empty supplemental arena, preallocating enough space to store supplemental
