Program crash: GC destroys an object unexpectedly

[eugene]

On Tuesday, 21 September 2021 at 20:47:41 UTC, H. S. Teoh wrote:
> And since stopper isn't used anymore after declaration, an 
> optimizing compiler is free to assume that it's not needed 
> afterwards, so it's not obligated to keep the reference alive 
> until the end of the function.

It was not obvious for me,
I thought lifetimes always
lasts until the end of a scope
(main in this case).