Runtime error when trying to add element to a vector in a thread

Asked May 15 '22 at 07:48

Active May 15 '22 at 08:01

Viewed 20 times

-1

Here is an MCVE:

#include <vector>
#include <thread>

class A{
    std::vector<int> foo;

public:
    A() {
        std::thread t([this]() { 
            foo.push_back(1); // line steps successfully
        }); // throws a runtime error when trying to step here
    }
};

int main()
{
    A a;
    return 0;
}

In the debugger the line foo.push_back(1) runs and then it throws runtime error in the next line...

Here is a screenshot:

asked May 15 '22 at 07:48

Chandrachur Mukherjee

1

Is it possible that the main program finishes (and deallocates a) before the thread is finished? You might need to add a join() to the main thread – teambob May 15 '22 at 07:52
I tried adding an infinite while loop with while(true); after A a. Still giving same error. – Chandrachur Mukherjee May 15 '22 at 07:55
@teambob It happens earlier on `t` life end in the constructor. – 273K May 15 '22 at 07:57
Perhaps try using the join() as suggested. An infinite loop may be optimised out by the compiler – teambob May 15 '22 at 07:58

Runtime error when trying to add element to a vector in a thread

0 Answers0