Bug#972787: picard: Aborts if directory scan finds a directory which cannot be read

[Ian Campbell <ijc@debian.org>]

Package: picard
Version: 2.4.4-1
Severity: important

Dear Maintainer,

Picard is aborting when it comes across the lost+found directory in my music
mountpoint:

    $ picard /storage/music/
    I: 15:52:59,827 /usr/lib/picard/picard/config._backup_settings:274: Backing up config file to /home/ijc/.config/MusicBrainz/Picard-2.4.1.ini
    Traceback (most recent call last):
      File "/usr/lib/picard/picard/tagger.py", line 391, in _run_init
        self.add_directory(decode_filename(file))
      File "/usr/lib/picard/picard/tagger.py", line 574, in add_directory
        files = self._scan_dir([path],
      File "/usr/lib/picard/picard/tagger.py", line 542, in _scan_dir
        for entry in os.scandir(current_folder):
    PermissionError: [Errno 13] Permission denied: '/storage/music/lost+found'
    Aborted
    $ ls -ld /storage/music/lost+found/
    drwx------ 2 root root 16384 Jun 25  2011 /storage/music/lost+found//

Thanks,
Ian.

-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (500, 'oldstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armhf, armel, arm64

Kernel: Linux 5.7.0-2-amd64 (SMP w/8 CPU threads)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages picard depends on:
ii  libc6                 2.31-3
ii  libchromaprint-tools  1.5.0-1
ii  python3               3.8.2-3
ii  python3-dateutil      2.8.1-4
ii  python3-libdiscid     1.1-1+b2
ii  python3-mutagen       1.45.0-2
ii  python3-pyqt5         5.15.1+dfsg-2+b1

Versions of packages picard recommends:
ii  libqt5multimedia5-plugins   5.14.2-2
ii  python3-pyqt5.qtmultimedia  5.15.1+dfsg-2+b1

Versions of packages picard suggests:
ii  hicolor-icon-theme  0.17-2

-- no debconf information