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| -rw-r--r-- | library/core/src/array/mod.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs index c4bb5ab7b21..452ec95266f 100644 --- a/library/core/src/array/mod.rs +++ b/library/core/src/array/mod.rs @@ -48,6 +48,7 @@ pub use iter::IntoIter; /// assert_eq!(strings, ["Hello there!", "Hello there!"]); /// ``` #[inline] +#[must_use = "cloning is often expensive and is not expected to have side effects"] #[stable(feature = "array_repeat", since = "CURRENT_RUSTC_VERSION")] pub fn repeat<T: Clone, const N: usize>(val: T) -> [T; N] { from_trusted_iterator(repeat_n(val, N)) |