Bug#549760: libipc-shareable-perl: FTBFS: tests failed

[gregor herrmann]

tag 549760 + unreproducible
thanks

On Mon, 05 Oct 2009 20:44:48 +0200, Lucas Nussbaum wrote:

> During a rebuild of all packages in sid, your package failed to build on
> amd64.
> 
> > t/38ipchv.t ... 
> > Failed 2/5 subtests 
> > t/40ipcref.t .. ok
> > t/45obj.t ..... ok
> > t/50ipcobj.t .. ok
> > t/55lsync.t ... ok
> > 
> > Test Summary Report
> > -------------------
> > t/38ipchv.t (Wstat: 0 Tests: 3 Failed: 0)
> >   Parse errors: Tests out of sequence.  Found (4) but expected (2)
> >                 Tests out of sequence.  Found (5) but expected (3)
> >                 Bad plan.  You planned 5 tests but ran 3.
> > Files=14, Tests=91, 1916 wallclock secs ( 0.04 usr  0.04 sys +  0.53 cusr  0.11 csys =  0.72 CPU)

Hm, seems I haven't looked at that bug yet, and again it seems to be
one of these heisenbugs; i.e. it builds fine in an i386 and a amd64
cowbuilder sid chroot.

"Tests out of sequence" combined with the forking and sleeping in the
test and the dynamic numbering for the test cases (!) might lead to
some timing/load issues.

From looking at the code and adding a bit of debug output, the child
process starts, sleeps until awakened by the parent, runs test (1),
sleeps, gets awakened by the parent -- which has a waitpid($pid, 0)
at that point, runs tests (2) and (3), then the parent should run
tests (4) and (5).

Maybe that helps some better Perl coder to find out why the sequence
gets twisted :)


Cheers,
gregor

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