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fix(library/blast/discr_tree): bug in the discrimination tree module

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This commit is contained in:
Leonardo de Moura 2016-01-06 17:30:44 -08:00
parent 3c22a9d4e1
commit 27eea05da9
2 changed files with 20 additions and 2 deletions
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4
src/library/blast/discr_tree.cpp
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@ -171,7 +171,7 @@ auto discr_tree::insert_erase_app(node && n, bool is_root, expr const & e, buffe
if (is_constant(fn) || is_local(fn)) {
if (!is_root)
todo.push_back(mk_pair(*g_delimiter, false));
fun_info info = get_fun_info(fn);
fun_info info = get_fun_info(fn, args.size());
buffer<param_info> pinfos;
to_buffer(info.get_params_info(), pinfos);
lean_assert(pinfos.size() == args.size());
@ -281,7 +281,7 @@ bool discr_tree::find_app(node const & n, expr const & e, list<pair<expr, bool>>
buffer<expr> args;
expr const & f = get_app_args(e, args);
if (is_constant(f) || is_local(f)) {
fun_info info = get_fun_info(f);
fun_info info = get_fun_info(f, args.size());
buffer<param_info> pinfos;
to_buffer(info.get_params_info(), pinfos);
lean_assert(pinfos.size() == args.size());

18
tests/lean/run/blast_discr_tree_bug.lean Normal file
View file

@ -0,0 +1,18 @@
open subtype nat
constant f : Π (a : nat), {b : nat | b > a} → nat
definition f_flat (a : nat) (b : nat) (p : b > a) : nat :=
f a (tag b p)
definition greater [reducible] (a : nat) := {b : nat | b > a}
set_option blast.recursion.structure true
definition f_flat_def [simp] (a : nat) (b : nat) (p : b > a) : f a (tag b p) = f_flat a b p :=
rfl
definition has_property_tag [simp] {A : Type} {p : A → Prop} (a : A) (h : p a) : has_property (tag a h) = h :=
rfl
lemma to_f_flat : ∀ (a : nat) (b : greater a), f a b = f_flat a (elt_of b) (has_property b) :=
by rec_simp