[Bug c++/66096] Unexpected __gnu_cxx::__concurrence_lock_error with _GLIBCXX_DEBUG

[mirzayanovmr at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66096

--- Comment #1 from MikeMirzayanov <mirzayanovmr at gmail dot com> ---
The code is:

#define _GLIBCXX_DEBUG

#include <set>
#include <map>

using namespace std;

map<int, pair<bool, pair<int,int> > > q;

int main(int argc, char* argv[])
{
    set<int> can;
    can.insert(1);
}