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diff --git a/test-suite/bugs/closed/4198.v b/test-suite/bugs/closed/4198.v
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+Require Import List.
+Open Scope list_scope.
+Goal forall A (x x' : A) (xs xs' : list A) (H : x::xs = x'::xs'),
+       let k :=
+           (match H in (_ = y) return x = hd x y with
+              | eq_refl => eq_refl
+            end : x = x')
+       in k = k.
+  simpl.
+  intros.
+  match goal with
+    | [ |- appcontext G[@hd] ] => idtac
+  end.