#include <iostream>
#include <vector>
#include <functional>

using namespace std;

int main(){
    function <bool()> func=[](){
      vector <bool> a(1,true);
      return a[0];
    };
    
    for(int i=0;i<10;i++)
        cout<<func()<<'\n';

    return 0;
}

I coundn't find, how disable formatting.

==4924==ERROR: AddressSanitizer: heap-use-after-free on address 0x129004d0 at pc 0x00ff646e bp 0x116cf574 sp 0x116cf570 READ of size 4 at 0x129004d0 thread T0 #0 0xff646d in std::_Vb_reference<std::_Wrap_alloc<std::allocator > >::operator bool C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.11.25503\include\vector:2213 #1 0xff294d in std::_Invoker_ret<bool,0>::_Call<`lambda at p71.cpp:8:2...

Runtime error: exit code is 1

Used: 46 ms, 16108 KB

#include <iostream>
#include <vector>
#include <functional>

using namespace std;

int main(){
    function <bool()> func=[](){
      vector <bool> a(1,true);
      bool t=a[0];
      return t;
    };
    
    for(int i=0;i<10;i++)
        cout<<func()<<'\n';

    return 0;
}

I solved a problem in Timus, and approximately this function was called several times on sample. In my local Windows G++ 8.1.0 the output was always correct. In Timus the output was incorrect in first call (I got WA1). In Codeforcess::CustomTest the output first 3 times was correct, then incorrect (I mension, that internal body of the function with all variables' values it used was the same). I can show code with this behaviour, but not in public, as except this place, this is the correct solution of some problem.