The reason it crashes from screenshots is because the system has lost the ability to reallocate memory. I have noticed this when pointers started mysteriously carrying over between functions. It is still saying there's an error in malloc.c here:

void * __cdecl _malloc_base (size_t size)
{
void *res = NULL;

// validate size
if (size <= _HEAP_MAXREQ) {
for (;;) {

// allocate memory block < this is what it's failing at
res = _heap_alloc(size); <THIS

// if successful allocation, return pointer to memory
// if new handling turned off altogether, return NULL

if (res != NULL)
{
break;
}

Compile options problem?

I KNEW IT!

First-chance exception at 0x77423AB3 (ntdll.dll) in Mythical Mod.exe: 0xC0000005: Access violation reading location 0x80010000.
First-chance exception at 0x768EC41F in Mythical Mod.exe: Microsoft C++ exception: std::bad_alloc at memory location 0x0065F390.

This s***:

Snapshot * Simulation::CreateSnapshot()
{
Snapshot * snap = new Snapshot(); //DANGER!