[Scons-users] Possible 2.5.1 regression on Windows? (was: Unreliable build problem)

[Bill Deegan]

Steve,

That's useful to know 2.3.6 isn't showing this.
We've had a few reports of others running into it.

Are you using CacheDirs?

-Bill

On Wed, May 3, 2017 at 10:42 AM, Hill, Steve (FP COM) <Steve.Hill at cobham.com
> wrote:

> Hi all,
>
> While looking at the unreliable build problem (which I will return to), I
> upgraded to 2.5.1 (from 2.3.6). Unfortunately, this seems to have
> introduced an issue which is preventing me from rolling the new version out
> the development community: I am seeing the file handle inheritance problem
> again that _scons_file and _scons_open were added to work around.
>
> We typically use between 8 and 12 build threads (depending on the physical
> machine that we are building on) and, when building with 2.5.1, we quite
> frequently see the build fail with some sort of access denied issue. The
> build system automatically runs handle.exe in this case and I can see that
> the other (unrelated) build threads have an open handle on the file at this
> time. Reverting to 2.3.6 results in the issue going away.
>
> I've confirmed that _scons_open and _scons_file are both in place for the
> built-in file() and open() and I've monkey patched os.open to assert that
> it is always called with the os.O_NOINHERIT flag. Does anyone know what
> other functions could be causing this that I can check?
>
> Thanks,
>
> S.
>
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