While my brain was AFK I typed up this declaration, forgetting to specify what the map key template type should be. But this does not throw some error in the script-vm during compilation as one expects, instead, it results in a crash to death. My fault of course, but I think it might be good to catch this for people who won't understand what they did wrong so easily.
```
class REPRODUCE_CRASH
{
ref map<ref map<string>> m_mNestedMap;
};
```