Bug#848060: libx11-protocol-other-perl: FTBFS randomly (failing tests)

[Santiago Vila]

Package: src:libx11-protocol-other-perl
Version: 28-1
Severity: serious

Dear maintainer:

I tried to build this package in stretch with "dpkg-buildpackage -A"
(which is what the "Arch: all" autobuilder would do to build it)
but it failed:

--------------------------------------------------------------------------------
[...]
 debian/rules build-indep
dh build-indep
dh: Compatibility levels before 9 are deprecated (level 8 in use)
   dh_testdir -i
   dh_update_autotools_config -i
   dh_auto_configure -i
dh_auto_configure: Compatibility levels before 9 are deprecated (level 8 in use)
	perl -I. Makefile.PL INSTALLDIRS=vendor
Warning: NAME must be a package name
Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for X11-Protocol-Other

[... snipped ...]

Failed 7/7 subtests 
# X11::Protocol version 0.56
# XTEST extension opcode=132 event=0 error=0
# server XTEST version 2.0
# END
t/XTEST.t ....................... 
1..16
# Running under perl version 5.024001 for linux
# Current time local: Mon Dec 12 21:58:57 2016
# Current time GMT:   Mon Dec 12 20:58:57 2016
# Using Test.pm version 1.28_01
ok 1
ok 2
ok 3
ok 4
ok 5
ok 6
ok 7
ok 8
ok 9
ok 10
ok 11
ok 12
ok 13
ok 14
ok 15
ok 16
ok

Test Summary Report
-------------------
t/XSetRoot.t                  (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 7 tests but ran 0.
Files=47, Tests=1111, 12 wallclock secs ( 0.13 usr  0.02 sys +  1.08 cusr  0.08 csys =  1.31 CPU)
Result: FAIL
Failed 1/47 test programs. 0/1111 subtests failed.
Makefile:985: recipe for target 'test_dynamic' failed
make[2]: *** [test_dynamic] Error 255
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
dh_auto_test: make -j1 test TEST_VERBOSE=1 returned exit code 2
debian/rules:8: recipe for target 'override_dh_auto_test' failed
make[1]: *** [override_dh_auto_test] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
debian/rules:4: recipe for target 'build-indep' failed
make: *** [build-indep] Error 2
dpkg-buildpackage: error: debian/rules build-indep gave error exit status 2
--------------------------------------------------------------------------------

This is just the end of the build log. I attach several build logs in full.

The failure happens randomly. Sometimes it fails, sometimes it does not.

Thanks.
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