Clang: Crash in CodeCompleteConstructorInitializer for invalid code when doing completion

class Foo
{
public:
    template <size_t size>
    Foo(char (&target)[size])
        : _target(target), _size
//       to crash, type '('here ^
    { }

    char * _target{nullptr};
    std::size_t _size{0};
};