The class describes an exception thrown to indicate that an allocation request did not succeed due to array size less than zero or greater than its limit.

class bad_array_new_length : public bad_alloc {
    public: bad_array_new_length() noexcept;
    const char* what() const noexcept override;
};

The value returned by what is an implementation-defined C string. None of the member functions throw any exceptions.

Header: <new>

exception Class
Thread Safety in the C++ Standard Library