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+(* Testing the reordering of hypothesis required by pattern, fold and change. *)
+Goal forall (A:Set) (x:A) (A':=A), True.
+intros.
+fold A' in x. (* suceeds: x is moved after A' *)
+Undo.
+pattern A' in x.
+Undo.
+change A' in x.
+Abort.
+
+(* p and m should be moved before H *)
+Goal forall n:nat, n=n -> forall m:nat, let p := (m,n) in True.
+intros.
+change n with (snd p) in H.
+Abort.