[Scons-users] Internal Error: No dependency cycle found

[Stefan Ross]

Hi Dirk,

I've review the patch, it's related to correct tidy-up in the event that a
Node fails to build.  So I don't think this is directly relevant, as I
shouldn't be getting any failures in the first place.  However, it is
possible it's in the right area, since I'm seeing the following:

1) Internal error as already reported.
2) Build again with identical command...more targets build, including one
which both was in the list of Nodes for the internal error, and has a
dependency on a side-effect Node.  The second build is successful.

I'm going to investigate further whether this is related to side-effects.

Finally, the patch doesn't work as-is because get_side_effects is not
defined.  This is noted as an issue with patch v2, but applies to v3 as
well.

Thanks

Stefan

On Tue, Nov 10, 2015 at 7:32 PM, Stefan Ross <stefan at electricimp.com> wrote:

> Hi Dirk,
>
> Thanks, I'll try the patch tomorrow.
>
> With regards to the other questions:
>
> 1) Not having a dependency cycle isn't the problem, it looks like it
> detects a cycle, then tries to follow it, and finds that in fact there is
> no cycle.
> 2)  So far I've been unable to reproduce this with a small example.  Our
> application is commercial so I can't provide the original code, and we have
> several hundred files being built so it may be hard to reduce to an
> effective example.
>
> Thanks
>
> Stefan
>
> On Tue, Nov 10, 2015 at 6:59 PM, Dirk Bächle <tshortik at gmx.de> wrote:
>
>> Hi Stefan,
>>
>> On 10.11.2015 18:09, Stefan Ross wrote:
>>
>>> Hi all,
>>>
>>> I'm hoping you can help with what looks like a bug, but could be an
>>> artifact of how I've designed my SConscript files.
>>>
>>> I'm seeing the following error when doing parallel builds (-j4):
>>>
>>> ...
>>>
>>> scons: *** Found dependency cycle(s):
>>>    Internal Error: no cycle found for node ...
>>>
>>>
>> this looks like issue #2777 (
>> http://scons.tigris.org/issues/show_bug.cgi?id=2777 ). Can you try the
>> patch attached to the bug description, and report back whether it fixes
>> things for you?
>>
>> If yes, we could try to push this fix out with one of the next releases.
>>
>> Best regards,
>>
>> Dirk
>>
>>
>> _______________________________________________
>> Scons-users mailing list
>> Scons-users at scons.org
>> https://pairlist4.pair.net/mailman/listinfo/scons-users
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist4.pair.net/pipermail/scons-users/attachments/20151111/3948de5f/attachment.html>