Why does the RTS run GC right before shutting down?

[Ömer Sinan Ağacan]

Hi,

I'm wondering why we run GC in this line:

https://github.com/ghc/ghc/blob/master/rts/Schedule.c#L2670

I went back in commit history using git blame and found the commit that
introduced that line (5638488ba28), but it didn't help. Does anyone know why we
need that line?

Thanks,

Ömer