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| -rw-r--r-- | library/core/src/option.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/library/core/src/option.rs b/library/core/src/option.rs index b7af3ea8c1a..d1308549113 100644 --- a/library/core/src/option.rs +++ b/library/core/src/option.rs @@ -1179,6 +1179,7 @@ impl<T> Option<T> { /// *val = 3; /// assert_eq!(opt.unwrap(), 3); /// ``` + #[must_use = "if you intended to set a value, consider assignment instead"] #[inline] #[stable(feature = "option_insert", since = "1.53.0")] pub fn insert(&mut self, value: T) -> &mut T { |