Remove len argument from RawVec::reserve_for_push because it's always equal to capacity. Also make Vec::insert use reserve_for_push.

1 files changed, 2 insertions, 3 deletions

diff --git a/library/alloc/src/collections/vec_deque/mod.rs b/library/alloc/src/collections/vec_deque/mod.rs
index 41adc2e79dc..742daea873e 100644
--- a/library/alloc/src/collections/vec_deque/mod.rs
+++ b/library/alloc/src/collections/vec_deque/mod.rs
@@ -2086,10 +2086,9 @@ impl<T, A: Allocator> VecDeque<T, A> {
         // Extend or possibly remove this assertion when valid use-cases for growing the
         // buffer without it being full emerge
         debug_assert!(self.is_full());
-        let old_cap = self.capacity();
-        self.buf.reserve_for_push(old_cap);
+        self.buf.reserve_for_push();
         unsafe {
-            self.handle_capacity_increase(old_cap);
+            self.handle_capacity_increase(self.capacity());
         }
         debug_assert!(!self.is_full());
     }