Bug#891839: gnome-disk-utility: gnome-disks sees empty space instead of an existing extended partition

[Francesco Potortì]

Package: gnome-disk-utility
Version: 3.26.2-2
Severity: normal

I have two disks with the same partition table.  This is what fdisk says
about one of them, which is consistent with what is in /proc/partitions:

tucano:~# fdisk -G -l /dev/sda
GNU Fdisk 1.3.0a

Disk /dev/sda: 1000 GB, 1000202273280 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1       27296   219255088   83  Linux
/dev/sda2           27297       75486   387078142    5  Extended
/dev/sda5           27297       40350   104848222   fd  Lnx RAID auto
/dev/sda6           40351       45517    41495895   fd  Lnx RAID auto
/dev/sda7           45526       48713    25599577   fd  Lnx RAID auto
/dev/sda8           48714       49989    10241437   fd  Lnx RAID auto
/dev/sda9           49990       75486   204796620   83  Linux
/dev/sda3           75486      121602   370426770   83  Linux

This is alright and there is no problem.

However, gnome-disks sees the extended partition 2 as being of zero
length, followed by a 396GB unused space.  Primary partitions 1 and 3
are seen correctly.

This behaviour is completely reproducible, so please let me know what
details should I send to debug the problem.

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-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (101, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8), LANGUAGE=C:en_GB:en:en_US:it:fr:es (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnome-disk-utility depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.26.1-3
ii  libatk1.0-0                                  2.26.1-3
ii  libc6                                        2.26-6
ii  libcairo2                                    1.15.10-1
ii  libcanberra-gtk3-0                           0.30-6
ii  libdvdread4                                  6.0.0-1
ii  libgdk-pixbuf2.0-0                           2.36.11-1
ii  libglib2.0-0                                 2.54.3-2
ii  libgtk-3-0                                   3.22.28-1
ii  liblzma5                                     5.2.2-1.3
ii  libnotify4                                   0.7.7-3
ii  libpango-1.0-0                               1.40.14-1
ii  libpangocairo-1.0-0                          1.40.14-1
ii  libpwquality1                                1.4.0-2
ii  libsecret-1-0                                0.18.5-6
ii  libsystemd0                                  237-3
ii  libudisks2-0                                 2.7.6-1
ii  udisks2                                      2.7.6-1

gnome-disk-utility recommends no packages.

gnome-disk-utility suggests no packages.

-- no debconf information