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-rw-r--r--library/alloc/src/str.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/library/alloc/src/str.rs b/library/alloc/src/str.rs
index 6fee8d3fe33..a670bb5008a 100644
--- a/library/alloc/src/str.rs
+++ b/library/alloc/src/str.rs
@@ -604,6 +604,10 @@ impl str {
 /// Converts a boxed slice of bytes to a boxed string slice without checking
 /// that the string contains valid UTF-8.
 ///
+/// # Safety
+///
+/// * The provided bytes must contain a valid UTF-8 sequence.
+///
 /// # Examples
 ///
 /// ```