[DRE-maint] Bug#849510: ruby-parallel: FTBFS (failing tests)

[Santiago Vila]

Package: src:ruby-parallel
Version: 1.9.0-1
Severity: serious

Dear maintainer:

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

--------------------------------------------------------------------------------
[...]

Pending: (Failures listed here are expected and do not affect your suite's status)

  1) Parallel.in_processes kills the processes when the main process gets killed through ctrl+c
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:85

  2) Parallel.in_processes kills the processes when the main process gets killed through a custom interrupt
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:92

  3) Parallel.in_processes kills the threads when the main process gets killed through ctrl+c
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:98

  4) Parallel.in_processes does not kill processes when the main process gets sent an interrupt besides the custom interrupt
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:105

  5) Parallel.in_processes does not kill threads when the main process gets sent an interrupt besides the custom interrupt
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:114

  6) Parallel.in_processes does not kill anything on ctrl+c when everything has finished
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:123

  7) Parallel.in_processes preserves original intrrupts
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:135

  8) Parallel.in_processes does not open unnecessary pipes
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:174

  9) Parallel.map can be killed instantly
     # Temporarily skipped with xit
     # ./spec/parallel_spec.rb:370

Failures:

  1) Parallel.map saves time
     Failure/Error:
       time_taken{
       `ruby spec/cases/parallel_map_sleeping.rb`
       }.should <= 3.5

       expected: <= 3.5
            got:    4.040697336196899
     # ./spec/parallel_spec.rb:205:in `block (3 levels) in <top (required)>'

  2) Parallel.map starts new process imediatly when old exists
     Failure/Error:
       time_taken{
       `ruby spec/cases/parallel_map_uneven.rb`
       }.should <= 3.5

       expected: <= 3.5
            got:    4.034336805343628
     # ./spec/parallel_spec.rb:219:in `block (3 levels) in <top (required)>'

Finished in 45.2 seconds (files took 0.07625 seconds to load)
112 examples, 2 failures, 9 pending

Failed examples:

rspec ./spec/parallel_spec.rb:202 # Parallel.map saves time
rspec ./spec/parallel_spec.rb:216 # Parallel.map starts new process imediatly when old exists

/usr/bin/ruby2.3 /usr/bin/rspec --pattern ./spec/\*\*/\*_spec.rb --format documentation failed
ERROR: Test "ruby2.3" failed. Exiting.
dh_auto_install: dh_ruby --install /<<PKGBUILDDIR>>/debian/ruby-parallel returned exit code 1
debian/rules:15: recipe for target 'binary-indep' failed
make: *** [binary-indep] Error 1
dpkg-buildpackage: error: fakeroot debian/rules binary-indep gave error exit status 2
--------------------------------------------------------------------------------

The build was made in a QEMU/KVM virtual machine with a single CPU, using sbuild.

To be sure, I repeated the build several times.

I tried 11 times in total, in 6 different machines, and it always failed.
I've put the build logs here:

https://people.debian.org/~sanvila/ruby-parallel/

Maybe the author did not try this at all in a single CPU machine, or maybe
he/she believes all CPUs have the same speed.

Thanks.