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-rw-r--r--src/libcore/ops/function.rs4
1 files changed, 0 insertions, 4 deletions
diff --git a/src/libcore/ops/function.rs b/src/libcore/ops/function.rs
index 4a0a2720fe4..35790324a2f 100644
--- a/src/libcore/ops/function.rs
+++ b/src/libcore/ops/function.rs
@@ -137,10 +137,6 @@ pub trait Fn<Args> : FnMut<Args> {
 #[rustc_paren_sugar]
 #[rustc_on_unimplemented(
     on(Args="()", note="wrap the `{Self}` in a closure with no arguments: `|| {{ /* code */ }}"),
-    on(
-        all(Args="(char,)", _Self="std::string::String"),
-        note="borrowing the `{Self}` might fix the problem"
-    ),
     message="expected a `{FnMut}<{Args}>` closure, found `{Self}`",
     label="expected an `FnMut<{Args}>` closure, found `{Self}`",
 )]