diff options
author | Stephane Glondu <steph@glondu.net> | 2009-02-01 00:54:40 +0100 |
---|---|---|
committer | Stephane Glondu <steph@glondu.net> | 2009-02-01 00:54:40 +0100 |
commit | cfbfe13f5b515ae2e3c6cdd97e2ccee03bc26e56 (patch) | |
tree | b7832bd5d412a5a5d69cb36ae2ded62c71124c22 /test-suite/bugs/closed/shouldsucceed/2021.v | |
parent | 113b703a695acbe31ac6dd6a8c4aa94f6fda7545 (diff) |
Imported Upstream version 8.2~rc2+dfsgupstream/8.2.rc2+dfsg
Diffstat (limited to 'test-suite/bugs/closed/shouldsucceed/2021.v')
-rw-r--r-- | test-suite/bugs/closed/shouldsucceed/2021.v | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/shouldsucceed/2021.v b/test-suite/bugs/closed/shouldsucceed/2021.v new file mode 100644 index 00000000..e598e5ae --- /dev/null +++ b/test-suite/bugs/closed/shouldsucceed/2021.v @@ -0,0 +1,23 @@ +(* correct failure of injection/discriminate on types whose inductive + status derives from the substitution of an argument *) + +Inductive t : nat -> Type := +| M : forall n: nat, nat -> t n. + +Lemma eq_t : forall n n' m m', + existT (fun B : Type => B) (t n) (M n m) = + existT (fun B : Type => B) (t n') (M n' m') -> True. +Proof. + intros. + injection H. + intro Ht. + exact I. +Qed. + +Lemma eq_t' : forall n n' : nat, + existT (fun B : Type => B) (t n) (M n 0) = + existT (fun B : Type => B) (t n') (M n' 1) -> True. +Proof. + intros. + discriminate H || exact I. +Qed. |