Re: qemu test-qga failure on mergebuild after VERSION file change: dependency issues??

[Philippe Mathieu-Daudé]

On 7/16/20 9:52 PM, Michael Roth wrote:
> Quoting Philippe Mathieu-Daudé (2020-07-16 12:59:28)
>> On 7/16/20 7:55 PM, Michael Roth wrote:
>>> Quoting Peter Maydell (2020-07-16 05:53:17)
>>>> The first merge I tried to process after bumping VERSION for rc0
>>>> failed on test-qga like this:
>>>>
>>>> MALLOC_PERTURB_=${MALLOC_PERTURB_:-$(( ${RANDOM:-0} % 255 + 1))}
>>>> tests/test-qga -m=quick -k --tap < /dev/null | ./scripts/tap-driv
>>>> er.pl --test-name="test-qga"
>>>> PASS 1 test-qga /qga/sync-delimited
>>>> PASS 2 test-qga /qga/sync
>>>> PASS 3 test-qga /qga/ping
>>>> **
>>>> ERROR:/home/petmay01/linaro/qemu-for-merges/tests/test-qga.c:303:test_qga_info:
>>>> assertion failed (version == QEMU_VERSION): ("5.0.9
>>>> 0" == "5.0.50")
>>>> ERROR test-qga - Bail out!
>>>> ERROR:/home/petmay01/linaro/qemu-for-merges/tests/test-qga.c:303:test_qga_info:
>>>> assertion failed (versio
>>>> n == QEMU_VERSION): ("5.0.90" == "5.0.50")
>>>> Aborted (core dumped)
>>>> /home/petmay01/linaro/qemu-for-merges/tests/Makefile.include:659:
>>>> recipe for target 'check-unit' failed
>>>>
>>>> Looking at timestamps on files, tests/test-qga.o never got rebuilt,
>>>> even though config-host.h has been updated (and so has the new
>>>> QEMU_VERSION). Any idea what's gone wrong here?
>>>>
>>>> Also weird: this build tree has no .d files in it.
>>>
>>> I've been trying to reproduce with:
>>>
>>> make
>>> make check-unit
>>> *bump VERSION
>>> make check-unit
>>>
>>> but test-qga.o gets rebuilt as expected and the test passed.
>>>
>>> This is with ubuntu 18.04, x86, with out-of-tree build directory. Are you 
>>> aware
>>> of any other factors that might be needed to reproduce this?
>>
>> The problem is not for qga, it affects all QEMU objects.
> 
> But is it intermittent, environment-dependent? I'm trying to understand how to
> replicate Peter's result since it seems like it would be straightforward
> reproducer.

How to reproduce:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg723531.html

> 
>>
>>>
>>>>
>>>> thanks
>>>> -- PMM
>>>
>>
>