std::thread 结束时意外的解构函数调用

Question

当我使用 std::thread 调用 function "void createMemoryLeak(const MustP3DPlugin& plugin)" 时，一旦线程完成就会调用 MustP3DPlugin 的解构器。 我没想到会这样，我希望有人能向我解释为什么会这样。

#include <Windows.h>
#include <thread>

class MustP3DPlugin {
public:
    MustP3DPlugin();
    ~MustP3DPlugin();

    void WaitOneSecond() const;
};

int main() {
    MustP3DPlugin plugin = MustP3DPlugin();
}


void createNoMemoryLeak(const MustP3DPlugin* plugin) {
    plugin->WaitOneSecond();
}

void createMemoryLeak(const MustP3DPlugin& plugin) {
    plugin.WaitOneSecond();
}

MustP3DPlugin::MustP3DPlugin() {
    std::thread memoryLeakThread = std::thread(createMemoryLeak, *this);
    memoryLeakThread.join();
    //~MustP3DPlugin() is called

    std::thread noMemoryLeakThread = std::thread(createNoMemoryLeak, this );
    noMemoryLeakThread.join();
    //but ~MustP3DPlugin() is not called here
}


MustP3DPlugin::~MustP3DPlugin() {
    MessageBox(nullptr, TEXT("~MustP3DPlugin()"), TEXT("debug text"), MB_OK);
}

void MustP3DPlugin::WaitOneSecond() const {
    Sleep(1000);
}