https://s3.amazonaws.com/clickhouse-test-reports/0/6bd7e425c641417b9235ebf6d3ac876118f06fbe/fuzzer_astfuzzerubsan,actions//report.html

It's related to `ColumnSparse`.
unwrapped_values.reserve(arguments.size());
        is_null_values.reserve(arguments.size());
        for (size_t i = 0; i < arguments.size(); ++i)
        {
            auto * value = values[i];
            WhichDataType data_type(arguments[i]);
            if (data_type.isNullable())
            {
                unwrapped_values.emplace_back(b.CreateExtractValue(value, {0}));
                is_null_values.emplace_back(b.CreateExtractValue(value, {1}));
            }
            else
            {
                unwrapped_values.emplace_back(value);
            }
        }
        auto * result = compileImpl(builder, *denulled_arguments, unwrapped_values);
        auto * nullable_structure_type = toNativeType(b, makeNullable(getReturnTypeImpl(*denulled_arguments)));
        auto * nullable_structure_value = llvm::Constant::getNullValue(nullable_structure_type);
        auto * nullable_structure_with_result_value = b.CreateInsertValue(nullable_structure_value, result, {0});
        auto * nullable_structure_result_null = b.CreateExtractValue(nullable_structure_with_result_value, {1});
        for (auto * is_null_value : is_null_values)
            nullable_structure_result_null = b.CreateOr(nullable_structure_result_null, is_null_value);
        return b.CreateInsertValue(nullable_structure_with_result_value, nullable_structure_result_null, {1});
    }
    return compileImpl(builder, arguments, std::move(values));
}
#endif
}