buildbot exception in on aoo-win7

[buildbot]

The Buildbot has detected a build exception on builder aoo-win7 while building 
. Full details are available at:
    https://ci.apache.org/builders/aoo-win7/builds/363

Buildbot URL: https://ci.apache.org/

Buildslave for this Build: bb-win7

Build Reason: forced: by IRC user <dacha> (privmsg): with more disk space
Build Source Stamp: HEAD
Blamelist: 

BUILD FAILED: exception ls rm ls_1 interrupted

Sincerely,
 -The Buildbot