File: bug_3960.v

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Require Program.Tactics.

Axiom foo : nat -> Prop.

Axiom fooP : forall n, foo n.

Class myClass (A: Type) :=
  {
    bar : A -> Prop
  }.

#[export] Program Instance myInstance : myClass nat :=
  {
    bar := foo
  }.

Class myClassP (A : Type)  :=
  {
    super :: myClass A;
    barP : forall (a : A), bar a
  }.

#[export] Instance myInstanceP : myClassP nat :=
  {
    barP := fooP
  }.