1 files changed, 1 insertions, 2 deletions
diff --git a/compiler/rustc_mir_transform/src/coverage/query.rs b/compiler/rustc_mir_transform/src/coverage/query.rs
index 3bd7f31b45d..bf01b45eb40 100644
--- a/compiler/rustc_mir_transform/src/coverage/query.rs
+++ b/compiler/rustc_mir_transform/src/coverage/query.rs
@@ -164,7 +164,6 @@ fn is_inlined(body: &Body<'_>, statement: &Statement<'_>) -> bool {
 /// whether that means const mir or runtime mir. For `const fn` this opts for runtime
 /// mir.
 fn mir_body(tcx: TyCtxt<'_>, def_id: DefId) -> &mir::Body<'_> {
-    let id = ty::WithOptConstParam::unknown(def_id);
-    let def = ty::InstanceDef::Item(id);
+    let def = ty::InstanceDef::Item(def_id);
     tcx.instance_mir(def)
 }