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fix(frontends/lean/elaborator): instantiate metavariables before displaying error message

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2014-07-02 18:07:11 -07:00
parent 3809a3cc2c
commit 04b2a620f8
1 changed files with 4 additions and 4 deletions
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8
src/frontends/lean/elaborator.cpp
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@ -722,14 +722,14 @@ public:
return solve_unassigned_mvars(subst, e, visited);
}
void display_unassigned_mvars(expr const & e) {
void display_unassigned_mvars(expr const & e, substitution const & s) {
if (m_check_unassigned && has_metavar(e)) {
for_each(e, [&](expr const & e, unsigned) {
if (!is_metavar(e))
return has_metavar(e);
if (auto it = m_mvar2meta.find(mlocal_name(e))) {
expr meta = *it;
expr meta_type = type_checker(m_env).infer(meta);
expr meta = s.instantiate(*it);
expr meta_type = s.instantiate(type_checker(m_env).infer(meta));
goal g(meta, meta_type);
display_unsolved_proof_state(e, proof_state(goals(g), substitution(), m_ngen),
"don't know how to synthesize it");
@ -743,7 +743,7 @@ public:
expr apply(substitution & s, expr const & e) {
expr r = s.instantiate(e);
r = solve_unassigned_mvars(s, r);
display_unassigned_mvars(r);
display_unassigned_mvars(r, s);
return r;
}