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Diffstat (limited to 'test-suite/bugs/closed/3656.v')
-rw-r--r-- | test-suite/bugs/closed/3656.v | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/3656.v b/test-suite/bugs/closed/3656.v new file mode 100644 index 00000000..cbd773d0 --- /dev/null +++ b/test-suite/bugs/closed/3656.v @@ -0,0 +1,53 @@ +Module A. + Set Primitive Projections. + Record hSet : Type := BuildhSet { setT : Type; iss : True }. + Ltac head_hnf_under_binders x := + match eval hnf in x with + | ?f _ => head_hnf_under_binders f + | (fun y => ?f y) => head_hnf_under_binders f + | ?y => y + end. +Goal forall s : hSet, True. +intros. +let x := head_hnf_under_binders setT in pose x. + +set (foo := eq_refl (@setT )). generalize foo. simpl. cbn. +Abort. +End A. + +Module A'. +Set Universe Polymorphism. + Set Primitive Projections. +Record hSet (A : Type) : Type := BuildhSet { setT : Type; iss : True }. +Ltac head_hnf_under_binders x := + match eval compute in x with + | ?f _ => head_hnf_under_binders f + | (fun y => ?f y) => head_hnf_under_binders f + | ?y => y + end. +Goal forall s : @hSet nat, True. +intros. +let x := head_hnf_under_binders setT in pose x. + +set (foo := eq_refl (@setT nat)). generalize foo. simpl. cbn. +Abort. +End A'. + +Set Primitive Projections. +Record hSet : Type := BuildhSet { setT : Type; iss : True }. +Ltac head_hnf_under_binders x := + match eval hnf in x with + | ?f _ => head_hnf_under_binders f + | (fun y => ?f y) => head_hnf_under_binders f + | ?y => y + end. +Goal setT = setT. + progress unfold setT. (* should not succeed *) + match goal with + | |- (fun h => setT h) = (fun h => setT h) => fail 1 "should not eta-expand" + | _ => idtac + end. (* should not fail *) +Abort. + +Goal forall h, setT h = setT h. +Proof. intro. progress unfold setT. |