Theorem test (A:Prop) : A \/ A -> A.
Fail intros H; destruct H as H. (* Cannot coerce to a disjunctive/conjunctive pattern. *)
Fail intro H; destruct H as H. (* Disjunctive/conjunctive introduction pattern expected. *)
Fail let H := fresh in intro H; destruct H as H. (* Cannot coerce to a disjunctive/conjunctive pattern. *)
Fail let H := fresh in intros H; destruct H as H. (* Cannot coerce to a disjunctive/conjunctive pattern. *)
Fail let H := idtac in intros H; destruct H as H. (* Ltac variable H is bound to <tactic closure> which cannot be
coerced to an introduction pattern. *)
Fail let H := idtac in intros H; destruct H as H'. (* Disjunctive/conjunctive introduction pattern expected. *)
Fail let H' := idtac in intros H; destruct H as H'. (* Ltac variable H' is bound to <tactic closure> which cannot
be coerced to an introduction pattern. *) Abort.