1 files changed, 3 insertions, 2 deletions
diff --git a/library/core/src/str/pattern.rs b/library/core/src/str/pattern.rs
index 52e2364893e..2d941adfd85 100644
--- a/library/core/src/str/pattern.rs
+++ b/library/core/src/str/pattern.rs
@@ -38,6 +38,7 @@
     issue = "27721"
 )]
 
+use crate::char::MAX_LEN_UTF8;
 use crate::cmp::Ordering;
 use crate::convert::TryInto as _;
 use crate::slice::memchr;
@@ -561,8 +562,8 @@ impl Pattern for char {
     type Searcher<'a> = CharSearcher<'a>;
 
     #[inline]
-    fn into_searcher(self, haystack: &str) -> Self::Searcher<'_> {
-        let mut utf8_encoded = [0; 4];
+    fn into_searcher<'a>(self, haystack: &'a str) -> Self::Searcher<'a> {
+        let mut utf8_encoded = [0; MAX_LEN_UTF8];
         let utf8_size = self
             .encode_utf8(&mut utf8_encoded)
             .len()