[racket-dev] Win64 crashes (was: Pre-Release Checklist for v5.3.4)

Is there anything to learn about this bug that could lead to avoiding such
bugs in the future? Perhaps some simple property that was being violated
that one could write a checker for (maybe running Racket in some debug
mode)?

Robby


On Fri, Apr 19, 2013 at 11:20 AM, Matthew Flatt <mflatt at cs.utah.edu> wrote:

> At Thu, 18 Apr 2013 22:23:37 -0600, Doug Williams wrote:
> > I did have DrRacket crash twice on startup. I'm running the 64-bit
> version
> > under Windows 8 64-bit.
>
> The stars have aligned this morning!
>
> We've had reports of crashes specific to 64-bit Windows, but I had not
> been able to replicate the crash. This morning, it turns out that I'm
> able to provoke a crash easily and consistently (by trying the same
> things that I've always been trying).
>
> That crash that I see in the stack-unwinding code for generating JIT
> stack traces, which is Win64-specific and added September 2012 (after
> v5.3, before v5.3.1). That functionality is particularly likely to be
> triggered when you Run or Check Syntax a program. The bugs could easily
> manifest as either an immediate crash or a freeze. And the bugs could
> easily have no effect, depending on Racket thread scheduling and the
> layout of the stack. So, I think this bug is consistent with all of the
> reports.
>
> Even better, it turns out that I spent much of yesterday staring at the
> stack-unwinding code (for ARM), so the details were all paged in.
>
> I've pushed a repair, and I'll ping you when a build is ready to try out.
>
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