Cannot change the variable value in debug mode locals and expressions view

In the simple program:

#include <iostream>
using namespace std;
int main(int argc, char *argv[])

a breakpoint is set on the line "cout << ...". When debugging, the program stops at that breakpoint showing i=0 in the locals and expressions view. In the versions prior to 3.6.0 I could manually set the value of i in the locals view then continue the program with the manually set value. But in 3.6.0 that doesn't work – value of i is stays zero.