```
../contrib/libcxx/include/vector:1449: _LIBCPP_ASSERT '__n < size()' failed. vector[] index out of bounds Received signal 6 Received signal Aborted (6)
```

https://s3.amazonaws.com/clickhouse-test-reports/39973/24ee3e022df7e970b5925fea657bec3ad7303702/fuzzer_astfuzzerdebug//report.html

{
public:
    explicit Tree(const IAST * ast_) : ast(ast_) { assert(ast); }
    explicit Tree(const ActionsDAG::Node * dag_) : dag(dag_) { assert(dag); }
    std::string getColumnName() const
    {
        if (ast)
            return ast->getColumnNameWithoutAlias();
        else
            return getColumnNameWithoutAlias(*dag);
    }
    std::string getColumnNameLegacy() const
    {
        if (ast)
        {
            auto adjusted_ast = ast->clone();
            KeyDescription::moduloToModuloLegacyRecursive(adjusted_ast);
            return adjusted_ast->getColumnNameWithoutAlias();
        }
        else
            return getColumnNameWithoutAlias(*dag, true);
    }
    bool isFunction() const
    {
        if (ast)
            return typeid_cast<const ASTFunction *>(ast);
        else
            return dag->type == ActionsDAG::ActionType::FUNCTION;
    }
    bool isConstant() const