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fix(library/class_instance_resolution): bug in mk_choice_point

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This commit is contained in:
Leonardo de Moura 2015-10-20 12:45:05 -07:00
parent 0446c43ebf
commit 21bd30d51a
1 changed files with 2 additions and 1 deletions
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3
src/library/class_instance_resolution.cpp
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@ -632,6 +632,7 @@ struct cienv {
"(the class-instance resolution trace can be visualized by setting option 'class.trace_instances')",
mlocal_type(m_main_mvar));
}
bool toplevel_choice = m_choices.empty();
m_choices.push_back(choice());
choice & r = m_choices.back();
expr mvar_type = instantiate_uvars_mvars(mlocal_type(mvar));
@ -645,7 +646,7 @@ struct cienv {
if (!cname)
return false;
r.m_local_instances = get_local_instances(*cname);
if (m_trans_instances && m_choices.empty()) {
if (m_trans_instances && toplevel_choice) {
// we only use transitive instances in the top-level
r.m_trans_instances = get_class_derived_trans_instances(m_env, *cname);
}