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-rw-r--r--src/libcollections/vec.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libcollections/vec.rs b/src/libcollections/vec.rs
index 689d96b4b29..4c25c9866e4 100644
--- a/src/libcollections/vec.rs
+++ b/src/libcollections/vec.rs
@@ -356,7 +356,7 @@ impl<T> Vec<T> {
                 }
                 self.cap = 0;
             }
-        } else {
+        } else if self.cap != self.len {
             unsafe {
                 // Overflow check is unnecessary as the vector is already at
                 // least this large.