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Diffstat (limited to 'test-suite/failure/proofirrelevance.v')
| -rw-r--r-- | test-suite/failure/proofirrelevance.v | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/test-suite/failure/proofirrelevance.v b/test-suite/failure/proofirrelevance.v new file mode 100644 index 00000000..eedf2612 --- /dev/null +++ b/test-suite/failure/proofirrelevance.v @@ -0,0 +1,11 @@ +(* 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. + |