[DRE-maint] Bug#980094: FTBFS: Failure: test_format(Image_Attributes_UT): ArgumentError(<unknown format: MPEG>)

[Antonio Terceiro]

Source: ruby-rmagick
Version: 2.16.0-6+b3
Severity: serious
Tags: ftbfs
Justification: fails to build from source

Rebuilding ruby-rmagick on current unstable leads to a test suite
failure:

  test_format:						F
===============================================================================
Failure: test_format(Image_Attributes_UT):
  Exception raised:
  ArgumentError(<unknown format: MPEG>)
/<<PKGBUILDDIR>>/test/Image_attributes.rb:376:in `test_format'
     373:     assert_nothing_raised { @img.format = 'JPG' }
     374:     assert_nothing_raised { @img.format = 'TIFF' }
     375:     assert_nothing_raised { @img.format = 'MIFF' }
  => 376:     assert_nothing_raised { @img.format = 'MPEG' }
     377:     v = $VERBOSE
     378:     $VERBOSE = nil
     379:     assert_raise(ArgumentError) { @img.format = 'shit' }
===============================================================================

Full build log attached.

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'unstable'), (500, 'testing'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-1-amd64 (SMP w/4 CPU threads)
Locale: LANG=pt_BR.UTF-8, LC_CTYPE=pt_BR.UTF-8 (charmap=UTF-8), LANGUAGE=pt_BR:pt:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

-- no debconf information
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