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Diffstat (limited to 'test-suite/bugs/closed/3640.v')
-rw-r--r-- | test-suite/bugs/closed/3640.v | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/3640.v b/test-suite/bugs/closed/3640.v new file mode 100644 index 00000000..bdbfbb15 --- /dev/null +++ b/test-suite/bugs/closed/3640.v @@ -0,0 +1,31 @@ +(* File reduced by coq-bug-finder from original input, then from 14990 lines to 70 lines, then from 44 lines to 29 lines *) +(* coqc version trunk (September 2014) compiled on Sep 17 2014 0:22:30 with OCaml 4.01.0 + coqtop version cagnode16:/afs/csail.mit.edu/u/j/jgross/coq-trunk,trunk (d34e1eed232c84590ddb80d70db9f7f7cf13584a) *) +Set Primitive Projections. +Set Implicit Arguments. +Record sigT {A} P := existT { pr1 : A ; pr2 : P pr1 }. +Notation "{ x : A & P }" := (sigT (A := A) (fun x : A => P)) : type_scope. +Notation "x .1" := (pr1 x) (at level 3, format "x '.1'"). +Notation "x .2" := (pr2 x) (at level 3, format "x '.2'"). +Record Equiv A B := { equiv_fun :> A -> B }. +Notation "A <~> B" := (Equiv A B) (at level 85). +Inductive Bool : Type := true | false. +Definition negb (b : Bool) := if b then false else true. +Axiom eval_bool_isequiv : forall (f : Bool -> Bool), f false = negb (f true). +Lemma bool_map_equiv_not_idmap (f : { f : Bool <~> Bool & ~(forall x, f x = x) }) +: forall b, ~(f.1 b = b). +Proof. + intro b. + intro H''. + apply f.2. + intro b'. + pose proof (eval_bool_isequiv f.1) as H. + destruct b', b. + Fail match type of H with + | _ = negb (f.1 true) => fail 1 "no f.1 true" + end. (* Error: No matching clauses for match. *) + destruct (f.1 true). + simpl in *. + Fail match type of H with + | _ = negb ?T => unify T (f.1 true); fail 1 "still has f.1 true" + end. (* Error: Tactic failure: still has f.1 true. *)
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