[DRE-maint] Bug#847450: ruby-celluloid-io: FTBFS randomly (Failed examples: [...] mailbox_spec.rb)

[Santiago Vila]

Package: src:ruby-celluloid-io
Version: 0.16.2-3
Severity: serious

Dear maintainer:

To ensure that Bug #836595 was really fixed I tried to build this
package 200 times in unstable and it still failed from time to time
(using different autobuilders).

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

Deprecation Warnings:

Using `should_not` from rspec-expectations' old `:should` syntax without explicitly enabling the syntax is deprecated. Use the new `:expect` syntax or explicitly enable `:should` with `config.expect_with(:rspec) { |c| c.syntax = :should }` instead. Called from /<<PKGBUILDDIR>>/spec/celluloid/io/udp_socket_spec.rb:28:in `block (3 levels) in <top (required)>'.


If you need more of the backtrace for any of these deprecations to
identify where to make the necessary changes, you can configure
`config.raise_errors_for_deprecations!`, and it will turn the
deprecation warnings into errors, giving you the full backtrace.

1 deprecation warning total

Finished in 13.72 seconds (files took 0.49662 seconds to load)
189 examples, 1 failure

Failed examples:

rspec './spec/celluloid/io/mailbox_spec.rb[1:1:4]' # Celluloid::IO::Mailbox behaves like a Celluloid Mailbox waits for a given timeout interval

Randomized with seed 32799

/usr/bin/ruby2.3 /usr/bin/rspec ./spec/celluloid/io/actor_spec.rb ./spec/celluloid/io/dns_resolver_spec.rb ./spec/celluloid/io/mailbox_spec.rb ./spec/celluloid/io/ssl_server_spec.rb ./spec/celluloid/io/ssl_socket_spec.rb ./spec/celluloid/io/tcp_server_spec.rb ./spec/celluloid/io/udp_socket_spec.rb ./spec/celluloid/io/unix_server_spec.rb ./spec/celluloid/io_spec.rb --format documentation failed
ERROR: Test "ruby2.3" failed. Exiting.
dh_auto_install: dh_ruby --install /<<PKGBUILDDIR>>/debian/ruby-celluloid-io 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
--------------------------------------------------------------------------------

If you try to reproduce this in your machine, please try a *lot* of
times, the failure rate is about 2.5%.

I attach the five failed build logs I got.

Thanks.
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