I am unable to comprehend how this happens but here we go ... The code below causes the game to just crash and close. Both variants (one commented out) cause this.
It can be reproduced if a class with one or more template arguments and at least one class member is on the same line as another valid compiler unit, such as a function or global variable

class TemplateClass<Class T>{bool field;} void Something(){};
//class TemplateClass<Class T>{int field;}; int g_number = 42;

void main()
{   
    Print(new TemplateClass<int>());
}

The code itself is valid. If you split apart the troublesome bit into two separate lines like this, it works:

class TemplateClass<Class T>{bool field;}
void Something(){};

I have attached logs and dumps in the additional information section.