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path: root/compiler/rustc_mir_transform/src/generator.rs
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-rw-r--r--compiler/rustc_mir_transform/src/generator.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_mir_transform/src/generator.rs b/compiler/rustc_mir_transform/src/generator.rs
index 507e12d7238..5b3a66bc3d2 100644
--- a/compiler/rustc_mir_transform/src/generator.rs
+++ b/compiler/rustc_mir_transform/src/generator.rs
@@ -1399,7 +1399,7 @@ pub(crate) fn mir_generator_witnesses<'tcx>(
 ) -> GeneratorLayout<'tcx> {
     assert!(tcx.sess.opts.unstable_opts.drop_tracking_mir);
 
-    let (body, _) = tcx.mir_promoted(ty::WithOptConstParam::unknown(def_id));
+    let (body, _) = tcx.mir_promoted(def_id);
     let body = body.borrow();
     let body = &*body;