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Diffstat (limited to 'test-suite/failure/inductive4.v')
| -rw-r--r-- | test-suite/failure/inductive4.v | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test-suite/failure/inductive4.v b/test-suite/failure/inductive4.v new file mode 100644 index 00000000..6ba36fd2 --- /dev/null +++ b/test-suite/failure/inductive4.v @@ -0,0 +1,15 @@ +(* This used to succeed in versions 8.1 to 8.3 *) + +Require Import Logic. +Require Hurkens. +Definition Ti := Type. +Inductive prod (X Y:Ti) := pair : X -> Y -> prod X Y. +Definition B : Prop := let F := prod True in F Prop. (* Aie! *) +Definition p2b (P:Prop) : B := pair True Prop I P. +Definition b2p (b:B) : Prop := match b with pair _ P => P end. +Lemma L1 : forall A : Prop, b2p (p2b A) -> A. +Proof (fun A x => x). +Lemma L2 : forall A : Prop, A -> b2p (p2b A). +Proof (fun A x => x). +Check Hurkens.paradox B p2b b2p L1 L2. + |