Bug#898694: FTBFS with cowbuilder when network access is disabled

[Santiago R.R.]

Source: ruby2.3
Version: 2.3.3-1+deb9u2
Severity: serious

Other than the Failures in #889117, current ruby2.3 package fails to
build due to Rinda TestRingFinger and TestRingServer trying to access
network ressources:

…
  6) Error:
Rinda::TestRingFinger#test_make_socket_ipv4_multicast:
Errno::ENETUNREACH: Network is unreachable - connect(2) for 239.0.0.1:7647
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:431:in `connect'
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:431:in `make_socket'
    /build/ruby2.3-2.3.3/test/rinda/test_rinda.rb:782:in 
`test_make_socket_ipv4_multicast'

  7) Error:
Rinda::TestRingFinger#test_make_socket_ipv4_multicast_hops:
Errno::ENETUNREACH: Network is unreachable - connect(2) for 239.0.0.1:7647
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:431:in `connect'
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:431:in `make_socket'
    /build/ruby2.3-2.3.3/test/rinda/test_rinda.rb:809:in 
`test_make_socket_ipv4_multicast_hops'

  8) Error:
Rinda::TestRingServer#test_make_socket_ipv4_multicast:
Errno::ENODEV: No such device - setsockopt(2)
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:154:in `setsockopt'
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:154:in `make_socket'
    /build/ruby2.3-2.3.3/test/rinda/test_rinda.rb:626:in 
`test_make_socket_ipv4_multicast'

  9) Error:
Rinda::TestRingServer#test_ring_server_ipv4_multicast:
Errno::ENODEV: No such device - setsockopt(2)
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:154:in `setsockopt'
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:154:in `make_socket'
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:108:in `block in initialize'
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:106:in `each'
    /build/ruby2.3-2.3.3/lib/rinda/ring.rb:106:in `initialize'
    /build/ruby2.3-2.3.3/test/rinda/test_rinda.rb:667:in `new'
    /build/ruby2.3-2.3.3/test/rinda/test_rinda.rb:667:in 
`test_ring_server_ipv4_multicast'

15919 tests, 2236057 assertions, 5 failures, 4 errors, 82 skips
…

I am preparing a commit to solve this in the stretch git branch.

cheers,

Santiago


-- System Information:
Debian Release: buster/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.16.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=es_CO.UTF-8, LC_CTYPE=es_CO.UTF-8 (charmap=UTF-8), 
LANGUAGE=es_CO:es (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

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