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

[Michael Roth <mdroth@linux.vnet.ibm.com>]

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.

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