At Wed, 29 Aug 2012 10:34:02 -0400, Sam Tobin-Hochstadt wrote: > On Wed, Aug 29, 2012 at 9:20 AM, Matthew Flatt <mfl...@cs.utah.edu> wrote: > > At Mon, 27 Aug 2012 17:36:42 -0400, Sam Tobin-Hochstadt wrote: > >> Since I've made the Typed Racket tests run in parallel, there have > >> been intermittent errors in DrDr, like this: > >> > >> http://drdr.racket-lang.org/25278/collects/tests/typed-racket/run.rkt > >> > >> I'm not sure exactly what could be causing this -- I don't think > >> promises should ever fail to `force`. Might there be something I'm > >> doing wrong, or is this a bug in promises? > > > > I've fixed a race in `delay/sync' that I think could cause the error. > > Unfortunately, this DrDr build with your fix still has the problem: > http://drdr.racket-lang.org/25292/collects/tests/typed-racket/run.rkt > > I've never been able to reproduce this bug on my machine, though.
For this problem, I think I should be looking at `delay/thread', instead of `delay/sync'. I can provoke the error in the DrDr report with (force (delay/thread (kill-thread (current-thread)))) I'll fix `delay/thread'. But could it be that a test wrapped with `delay/thread' times out and aborts by killing the current thread? _________________________ Racket Developers list: http://lists.racket-lang.org/dev
