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add invariant on parent-child class relationship #2730

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Aug 14, 2018
Merged

add invariant on parent-child class relationship #2730

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7 changes: 5 additions & 2 deletions src/goto-programs/class_hierarchy.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -50,8 +50,11 @@ void class_hierarchy_grapht::populate(const symbol_tablet &symbol_table)
const irep_idt &parent = to_symbol_type(base.type()).get_identifier();
if(!parent.empty())
{
add_edge(
nodes_by_name.at(parent), nodes_by_name.at(symbol_pair.first));
const auto parent_node_it = nodes_by_name.find(parent);
DATA_INVARIANT(
parent_node_it != nodes_by_name.end(),
"parent class not in symbol table");
add_edge(parent_node_it->second, nodes_by_name.at(symbol_pair.first));
}
}
}
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