c++ - Undesirable destructor call when starting a thread on a member function -

i have event loop in main function, in create object , run thread on object's member function. however, have noticed object destroyed before thread starting. don't understand why.

my code:

#include <iostream> #include <thread>  class myclass { public:     myclass(){         std::cout << "myclass constructor called" << std::endl;     }     ~myclass(){         std::cout << "myclass destructor called" << std::endl;     }         void start(){         std::cout << "myclass starting" << std::endl;     } };  int main() {         myclass mine;         std::thread t(&myclass::start, mine);         t.join(); } 

output:

myclass constructor called myclass destructor called myclass starting myclass destructor called myclass destructor called 

desired output:

myclass constructor called myclass starting myclass destructor called 

pass mine reference: std::thread t(&myclass::start, std::ref(mine)); type of mine myclass, meaning pass value. std::thread passes copy of newly created thread.

you need explicitly tell template passing mine reference.