Comment 100 for bug 527938

Bjoern Michaelsen committed a patch related to this issue.
It has been pushed to "master":

http://cgit.freedesktop.org/libreoffice/core/commit/?id=76c61ced4eaa5f69b948dca7537028eaa88225b3

check for and handle missing base in mail merge (related: fdo#33266)

It will be available in 5.0.0.

The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
http://wiki.documentfoundation.org/Testing_Daily_Builds
Affected users are encouraged to test the fix and report feedback.