Re: [Xen-devel] [xen-4.4-testing test] 66583: regressions - FAIL

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Tue, 22 Dec 2015, Jan Beulich wrote:
> >>> On 22.12.15 at 14:55, <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> > On Mon, 21 Dec 2015, Jan Beulich wrote:
> >> >>> On 20.12.15 at 13:25, <osstest-admin@xxxxxxxxxxxxxx> wrote:
> >> > flight 66583 xen-4.4-testing real [real]
> >> > http://logs.test-lab.xenproject.org/osstest/logs/66583/ 
> >> > 
> >> > Regressions :-(
> >> > 
> >> > Tests which did not succeed and are blocking,
> >> > including tests which could not be run:
> >> >  build-amd64-prev              5 xen-build                 fail REGR. 
> >> > vs. 
> > 66458
> >> >  build-i386-prev               5 xen-build                 fail REGR. 
> >> > vs. 
> > 66458
> >> 
> >> Ian, Stefano,
> >> 
> >> is one of you two looking into this?
> >> 
> >> block-qcow.c: In function 'get_cluster_offset':
> >> block-qcow.c:444:3: error: 'tmp_ptr' may be used uninitialized in this 
> > function [-Werror=maybe-uninitialized]
> >>    memcpy(tmp_ptr, l1_ptr, 4096);
> >>    ^
> >> block-qcow.c:619:7: error: 'tmp_ptr2' may be used uninitialized in this 
> > function [-Werror=maybe-uninitialized]
> >>    if (write(s->fd, tmp_ptr2, 4096) != 4096) {
> >>        ^
> >> cc1: all warnings being treated as errors
> >> 
> > /home/osstest/build.66583.build-amd64-prev/xen/tools/blktap/drivers/../../../to
> > ols/Rules.mk:89: recipe for target 'block-qcow.o' failed
> >> make[5]: *** [block-qcow.o] Error 1
> > 
> > What does build-amd64-prev means? I cannot find the explanation of the
> > test anywhere.
> 
> Iiuc it's the build pf the previous version, needed to test n-1 -> n
> migration. I.e. (in line with the respective 4.3 failure) it indicates
> that 4.3's qemu doesn't build.

Thanks for the explanation, it was very helpful.

From the logs what is not building is actually tools/blktap, not QEMU
though, but I cannot reproduce the failure.

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