qio: Change qwait to throw errors
authorBarret Rhoden <brho@cs.berkeley.edu>
Thu, 16 Jul 2015 17:22:02 +0000 (13:22 -0400)
committerBarret Rhoden <brho@cs.berkeley.edu>
Fri, 24 Jul 2015 07:05:13 +0000 (03:05 -0400)
It was always capable of throwing errors, for instance on a rendez_sleep
that is cancelled.  For real errors, like the multiple eof reads, we'll
actually throw an error.


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