[DRE-maint] Bug#836825: ruby-sys-filesystem: FTBFS in testing (failing tests)

[Santiago Vila]

Package: src:ruby-sys-filesystem
Version: 1.1.7-1
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 --buildsystem=ruby --with ruby
   dh_testdir -i -O--buildsystem=ruby
   dh_update_autotools_config -i -O--buildsystem=ruby
   dh_auto_configure -i -O--buildsystem=ruby
	dh_ruby --configure
   dh_auto_build -i -O--buildsystem=ruby
	dh_ruby --build
   dh_ruby --build
   dh_auto_test -i -O--buildsystem=ruby
	dh_ruby --test
 fakeroot debian/rules binary-indep
dh binary-indep --buildsystem=ruby --with ruby

[... snipped ...]

/<<PKGBUILDDIR>>/debian/ruby-sys-filesystem/usr/lib/ruby/vendor_ruby/sys/unix/sys/filesystem.rb:301:in `mounts'
/<<PKGBUILDDIR>>/test/test_sys_filesystem_unix.rb:22:in `setup'
===============================================================================
: (0.000443)
  test_to_gb:						E
===============================================================================
Error: test_to_gb(TC_Sys_Filesystem_Unix): Errno::ENOENT: No such file or directory - setmntent
/<<PKGBUILDDIR>>/debian/ruby-sys-filesystem/usr/lib/ruby/vendor_ruby/sys/unix/sys/filesystem.rb:301:in `mounts'
/<<PKGBUILDDIR>>/test/test_sys_filesystem_unix.rb:22:in `setup'
===============================================================================
: (0.000468)
  test_to_kb:						E
===============================================================================
Error: test_to_kb(TC_Sys_Filesystem_Unix): Errno::ENOENT: No such file or directory - setmntent
/<<PKGBUILDDIR>>/debian/ruby-sys-filesystem/usr/lib/ruby/vendor_ruby/sys/unix/sys/filesystem.rb:301:in `mounts'
/<<PKGBUILDDIR>>/test/test_sys_filesystem_unix.rb:22:in `setup'
===============================================================================
: (0.000471)
  test_to_mb:						E
===============================================================================
Error: test_to_mb(TC_Sys_Filesystem_Unix): Errno::ENOENT: No such file or directory - setmntent
/<<PKGBUILDDIR>>/debian/ruby-sys-filesystem/usr/lib/ruby/vendor_ruby/sys/unix/sys/filesystem.rb:301:in `mounts'
/<<PKGBUILDDIR>>/test/test_sys_filesystem_unix.rb:22:in `setup'
===============================================================================
: (0.000455)
  test_version:						E
===============================================================================
Error: test_version(TC_Sys_Filesystem_Unix): Errno::ENOENT: No such file or directory - setmntent
/<<PKGBUILDDIR>>/debian/ruby-sys-filesystem/usr/lib/ruby/vendor_ruby/sys/unix/sys/filesystem.rb:301:in `mounts'
/<<PKGBUILDDIR>>/test/test_sys_filesystem_unix.rb:22:in `setup'
===============================================================================
: (0.000448)

Finished in 0.028448514 seconds.
------
45 tests, 0 assertions, 0 failures, 45 errors, 0 pendings, 0 omissions, 0 notifications
0% passed
------
1581.80 tests/s, 0.00 assertions/s
rake aborted!
Command failed with status (1): [ruby -I"test"  "/usr/lib/ruby/vendor_ruby/rake/rake_test_loader.rb" "test/test_sys_filesystem.rb" "test/test_sys_filesystem_unix.rb" -v]

Tasks: TOP => default
(See full trace by running task with --trace)
ERROR: Test "ruby2.3" failed. Exiting.
dh_auto_install: dh_ruby --install /<<PKGBUILDDIR>>/debian/ruby-sys-filesystem returned exit code 1
debian/rules:6: recipe for target 'binary-indep' failed
make: *** [binary-indep] Error 1
dpkg-buildpackage: error: fakeroot debian/rules binary-indep gave error exit status 2
--------------------------------------------------------------------------------

Because the package is "Architecture: all", the failure does not seem
related to using "dpkg-buildpackage -A".

Once you fix this, please consider uploading the package in source-only
form, so that we have pretty official build logs available here:

https://buildd.debian.org/status/package.php?p=ruby-sys-filesystem

Thanks.