1 files changed, 4 insertions, 10 deletions
diff --git a/compiler/rustc_symbol_mangling/src/legacy.rs b/compiler/rustc_symbol_mangling/src/legacy.rs
index 83e920e2f8e..1c62ce2d214 100644
--- a/compiler/rustc_symbol_mangling/src/legacy.rs
+++ b/compiler/rustc_symbol_mangling/src/legacy.rs
@@ -76,16 +76,10 @@ pub(super) fn mangle<'tcx>(
         }
         // FIXME(async_closures): This shouldn't be needed when we fix
         // `Instance::ty`/`Instance::def_id`.
-        ty::InstanceDef::ConstructCoroutineInClosureShim { target_kind, .. }
-        | ty::InstanceDef::CoroutineKindShim { target_kind, .. } => match target_kind {
-            ty::ClosureKind::Fn => unreachable!(),
-            ty::ClosureKind::FnMut => {
-                printer.write_str("{{fn-mut-shim}}").unwrap();
-            }
-            ty::ClosureKind::FnOnce => {
-                printer.write_str("{{fn-once-shim}}").unwrap();
-            }
-        },
+        ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
+        | ty::InstanceDef::CoroutineKindShim { .. } => {
+            printer.write_str("{{fn-once-shim}}").unwrap();
+        }
         _ => {}
     }