nullptr cannot be assigned to std::string

[JohnCoconut]

cocos2d-x version: master branch

In cocos/editor-support/cocostudio/CCBone.cpp

bool Bone::init()
{
    return Bone::init(nullptr);
}


bool Bone::init(const std::string& name)
{
    ....
}

The first overload calls the second overload with std::string set to nullptr. It's undefined behaviour.

The following program will crash at runtime (https://wandbox.org/permlink/3LOds99d8umEIGHm)

#include <iostream>
#include <string>

int main() {
    std::string s = nullptr;
    std::cout << s << std::endl;
    return 0;
}