[Reproducible-builds] Bug#782551: debbindiff: please implement graceful failure when /dev/shm is missing

[Cyril Brulebois]

Package: debbindiff
Version: 15
Severity: normal

Hi people,

since debbindiff isn't shipped in jessie, I've switched to a sid devel
schroot, installed it, and got that:

(sid-amd64-devel)kibi at wodi:~/debian-installer/packages$ debbindiff apt-setup-udeb_0.9[67]_amd64.udeb
Traceback (most recent call last):
  File "/usr/bin/debbindiff", line 120, in <module>
    sys.exit(main())
  File "/usr/bin/debbindiff", line 106, in main
    parsed_args.file1, parsed_args.file2)
  File "/usr/lib/python2.7/dist-packages/debbindiff/comparators/__init__.py", line 123, in compare_files
    return comparator(path1, path2, source)
  File "/usr/lib/python2.7/dist-packages/debbindiff/comparators/utils.py", line 60, in with_fallback
    inside_differences = original_function(path1, path2, source)
  File "/usr/lib/python2.7/dist-packages/debbindiff/comparators/deb.py", line 52, in compare_deb_files
    in_path1, in_path2, source=name))
  File "/usr/lib/python2.7/dist-packages/debbindiff/comparators/__init__.py", line 123, in compare_files
    return comparator(path1, path2, source)
  File "/usr/lib/python2.7/dist-packages/debbindiff/comparators/utils.py", line 60, in with_fallback
    inside_differences = original_function(path1, path2, source)
  File "/usr/lib/python2.7/dist-packages/debbindiff/comparators/gzip.py", line 56, in compare_gzip_files
    metadata1, metadata2, path1, path2, source='metadata')
  File "/usr/lib/python2.7/dist-packages/debbindiff/difference.py", line 303, in from_unicode
    *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/debbindiff/difference.py", line 290, in from_feeder
    unified_diff = diff(feeder1, feeder2)
  File "/usr/lib/python2.7/dist-packages/debbindiff/difference.py", line 260, in diff
    end_nl_q1 = Queue()
  File "/usr/lib/python2.7/multiprocessing/__init__.py", line 218, in Queue
    return Queue(maxsize)
  File "/usr/lib/python2.7/multiprocessing/queues.py", line 63, in __init__
    self._rlock = Lock()
  File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 147, in __init__
    SemLock.__init__(self, SEMAPHORE, 1, 1)
  File "/usr/lib/python2.7/multiprocessing/synchronize.py", line 75, in __init__
    sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue)
OSError: [Errno 13] Permission denied


The fact is: /dev/shm isn't bind-mounted into this chroot, and the python
multiprocessing module is quite unhappy about it. It might be worth
catching this issue and printing a message hinting at a possibly missing
mount.

Mraw,
KiBi.