Only split by-ref/by-move futures for async closures

2 files changed, 6 insertions, 16 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();
+        }
         _ => {}
     }
 
diff --git a/compiler/rustc_symbol_mangling/src/v0.rs b/compiler/rustc_symbol_mangling/src/v0.rs
index f1b1b4ed2bb..6bc375512ac 100644
--- a/compiler/rustc_symbol_mangling/src/v0.rs
+++ b/compiler/rustc_symbol_mangling/src/v0.rs
@@ -46,12 +46,8 @@ pub(super) fn mangle<'tcx>(
         ty::InstanceDef::VTableShim(_) => Some("vtable"),
         ty::InstanceDef::ReifyShim(_) => Some("reify"),
 
-        ty::InstanceDef::ConstructCoroutineInClosureShim { target_kind, .. }
-        | ty::InstanceDef::CoroutineKindShim { target_kind, .. } => match target_kind {
-            ty::ClosureKind::Fn => unreachable!(),
-            ty::ClosureKind::FnMut => Some("fn_mut"),
-            ty::ClosureKind::FnOnce => Some("fn_once"),
-        },
+        ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
+        | ty::InstanceDef::CoroutineKindShim { .. } => Some("fn_once"),
 
         _ => None,
     };