c++ - Debug Assertion Failed! Expression: _BLOCK_TYPE_IS_VALID(pHead->nBlockUse) In program ended -

im doing physics simulation , have 2 classes, simulation , renderer. need have them reference each other , problem when pass reference renderer happens.

here code:

renderer.cpp  renderer::renderer(simulation* _sim) {     sim = new simulation(*_sim); }  renderer::~renderer() {     delete sim; }  renderer.hpp class renderer { private:     simulation* sim; public:     renderer(simulation* _sim);     ~renderer(); }; 

edit:

here requested code (the thing draw it):

renderer.cpp void renderer::draw() {      for(auto obj : sim->objects) {         glbegin(gl_points);         for(auto p : obj) {             glcolor3f(colors[p.id][0], colors[p.id][1], colors[p.id][2]);             glvertex2f(p.x,p.y);         }         glend();     } } 

the error coming sim = new simulation(*_sim);, if remove it, no errors. no ideas of how fix it?

fixed problem myself. double delete problem. simulation deleted when gonna delete it. i've removen delete sim.