[dmd-internals] Need help tracking down a machine-dependent heisenbug

[Martin Nowak]

On Wed, 16 Nov 2011 09:42:15 +0100, Don Clugston  
<dclugston at googlemail.com> wrote:

> My CTFE developement is currently blocked by a problem I cannot  
> reproduce.
>
> On DMD, checkout commit feaf4911ec (pull request #506)
> Build DMD.
> Compile Phobos unittests.
> Does the compiler segfault while compiling?
>
> On my machine (Win7, dual core) it compiles OK.
> On the autotester it also seems to have been OK.
> But on Walter's Windows machine, and on his Linux machine, it segfaults.
> (on Windows, it's when doing dmd -O -nofloat -w -d -L/co -c -unittest
> -ofunittest12.obj std\array.d std\functional.d std\range
> .d std\path.d std\outbuffer.d std\utf.d)
>
> From the log output, it is clear that the execution order is different
> on these two cases. Something is different, and I don't have any idea
> what it could be.
> So I need more data. I'd like to know if other people can reproduce
> the segfault.
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I could not reproduce it, but found a latent bug which could be  
responsible for it.
https://github.com/D-Programming-Language/dmd/pull/506#r232299