mask in waitQSem

[Yuras Shumovich]

On Fri, 2014-11-14 at 16:30 -0500, Brandon Allbery wrote:
> On Fri, Nov 14, 2014 at 4:23 PM, Yuras Shumovich <shumovichy at gmail.com>
> wrote:
> 
> > Here mask is used, but I looks completely useless for me. waitQSem
> > itself should be called with async exceptions masked, otherwise there is
> > no way to prevent resource leak.
> >
> > Do anyone know why mask is used here?
> >
> 
> I thought QSem was known to be completely unsafe and
> http://hackage.haskell.org/package/SafeSemaphore was recommended instead,
> with QSem and friends slated for removal?
> 
> In any case, there are probably leftover attempts to make it safe, yes.
> 

Oh, that explains it. Thank you a lot.

Yuras