Error in `/usr/share/doc-base/gcc-4.8-itm', line 29: format `html' already defined

[martin suchanek]

Error within installation process:

Processing 9 changed doc-base files...
Error in `/usr/share/doc-base/gcc-4.8-itm', line 29: format `html' already defined.
Note: `install-docs --verbose --check file_name' may give more details about the above error.

apt-cache policy doc-base
doc-base:
  Installed: 0.10.5
  Candidate: 0.10.5
  Version table:
 *** 0.10.5 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

apt-cache policy gcc-4.8-doc
gcc-4.8-doc:
  Installed: 4.8.2-17ubuntu2
  Candidate: 4.8.2-17ubuntu2
  Version table:
 *** 4.8.2-17ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alan Mimms (alanm-unforgettable)]

This is caused by the file /usr/share/doc-base/gcc-4.8-itm having two complete copies of its normal content. If I delete the file and then install gcc-4.8-doc, both copies are put into the file and the installation effectively fails to install properly.