c++ - VS2015 vector iterator not dereferencable -


i have little problem, have build 2d game based on sdl.

i keep getting errror when try delete 2 objects colliding in "scene".

std::vector<waspobject*>::iterator itw; std::vector<projectileobject*>::iterator itp;  (itp = _projectiles.begin(); itp != _projectiles.end();) {     (itw = _wasps.begin(); itw != _wasps.end();)     {         if ((*itw)->get_positiony() + 37 >= (*itp)->get_positiony() + 0 && (*itp)->get_positionx()+0 >= (*itw)->get_positionx()+0 && (*itp)->get_positionx()+0 <= (*itw)->get_positionx()+49)         {             itw = _wasps.erase(itw);             itp = _projectiles.erase(itp);         }         else         {             itw++;             itp++;         }     } }

_wasps , _projectiles std vectors in scene.

can me find problem? in advance!

if don't hits , increment itp in inner loop, might run past _projectiles.end().

for example if there more wasps projectiles. or if on last projectile, reach _projectiles.end() after single itp++.

so might want test both end conditions @ each turn of inner loop.


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