Check that sort-polymorphic inductive types is not too lax

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9297 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 11 insertions, 0 deletions

diff --git a/test-suite/failure/proofirrelevance.v b/test-suite/failure/proofirrelevance.v
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+++ b/test-suite/failure/proofirrelevance.v
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+(* This was working in version 8.1beta (bug in the Sort-polymorphism
+   of inductive types), but this is inconsistent with classical logic 
+   in Prop *)
+
+Inductive bool_in_prop : Type := hide : bool -> bool_in_prop
+with bool : Type := true : bool | false : bool.
+
+Lemma not_proof_irrelevance : ~ forall (P:Prop) (p p':P), p=p'.
+intro H; pose proof (H bool_in_prop (hide true) (hide false)); discriminate.
+Qed.
+