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

[Michael Roth]

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?

> 
> thanks
> -- PMM