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-rw-r--r--src/libcollections/binary_heap.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libcollections/binary_heap.rs b/src/libcollections/binary_heap.rs
index e321ef16f66..a4722c340dd 100644
--- a/src/libcollections/binary_heap.rs
+++ b/src/libcollections/binary_heap.rs
@@ -35,6 +35,8 @@
 //!     position: uint
 //! }
 //!
+//! impl Copy for State {}
+//!
 //! // The priority queue depends on `Ord`.
 //! // Explicitly implement the trait so the queue becomes a min-heap
 //! // instead of a max-heap.