Detect the bug in the following code

[Adam D. Ruppe via Digitalmars-d]

On Wednesday, 15 April 2015 at 14:44:48 UTC, Idan Arye wrote:
>         register = true;

Easy, you assigned to the wrong variable, that'd quickly be 
obvious at runtime too with a stack overflow.

I think it sucks that true and false will implicitly convert to 
int though, that bites people somewhat often. I wonder how much 
annoyance it would be to remove that implicit conversion.