1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_mir_transform/src/remove_zsts.rs b/compiler/rustc_mir_transform/src/remove_zsts.rs
index 6cabef92d..1becfddb2 100644
--- a/compiler/rustc_mir_transform/src/remove_zsts.rs
+++ b/compiler/rustc_mir_transform/src/remove_zsts.rs
@@ -13,7 +13,7 @@ impl<'tcx> MirPass<'tcx> for RemoveZsts {
 
     fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
         // Avoid query cycles (generators require optimized MIR for layout).
-        if tcx.type_of(body.source.def_id()).is_generator() {
+        if tcx.type_of(body.source.def_id()).subst_identity().is_generator() {
             return;
         }
         let param_env = tcx.param_env(body.source.def_id());