Comment 8 for bug 1242108

I'm having the same issue with Ubuntu 14.04. Should I file a separate bug report?

$ sudo apt install zsh zsh-doc
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  zsh-common
The following NEW packages will be installed:
  zsh zsh-common zsh-doc
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/5,000 kB of archives.
After this operation, 17.3 MB of additional disk space will be used.
Do you want to continue? [Y/n]
Selecting previously unselected package zsh-common.
(Reading database ... 166304 files and directories currently installed.)
Preparing to unpack .../zsh-common_5.0.2-3ubuntu6_all.deb ...
Unpacking zsh-common (5.0.2-3ubuntu6) ...
Selecting previously unselected package zsh.
Preparing to unpack .../zsh_5.0.2-3ubuntu6_amd64.deb ...
Unpacking zsh (5.0.2-3ubuntu6) ...
Selecting previously unselected package zsh-doc.
Preparing to unpack .../zsh-doc_5.0.2-3ubuntu6_all.deb ...
Unpacking zsh-doc (5.0.2-3ubuntu6) ...
Processing triggers for man-db (2.6.7.1-1) ...
Processing triggers for doc-base (0.10.5) ...
Processing 1 added doc-base file...
Processing triggers for install-info (5.2.0.dfsg.1-2) ...
Setting up zsh-common (5.0.2-3ubuntu6) ...
Setting up zsh (5.0.2-3ubuntu6) ...
update-alternatives: using /bin/zsh5 to provide /bin/zsh (zsh) in auto mode
update-alternatives: using /bin/zsh5 to provide /bin/rzsh (rzsh) in auto mode
update-alternatives: warning: skip creation of /usr/share/man/man1/rzsh.1.gz because associated file /usr/share/man/man1/zsh.1.gz (of link group rzsh) doesn't exist
Setting up zsh-doc (5.0.2-3ubuntu6) ...