This bug was fixed in the package p7zip - 15.14.1+dfsg-1
---
p7zip (15.14.1+dfsg-1) unstable; urgency=low
* New upstream version.
* Add CPP/ANDROID/Lzham/obj/* that contains some pre-compiled object
files to Files-Excluded in debian/copyright.
* Remove no longer needed patch
As a workaround I extracted the wrapper script from the non-full
package:
% cd /tmp
% wget http://launchpadlibrarian.net/93194080/p7zip_9.20.1%7Edfsg.1-4_amd64.deb
% mkdir p7zip_9.20.1%7Edfsg.1-4_amd64
% dpkg-deb -x p7zip_9.20.1~dfsg.1-4_amd64.deb p7zip_9.20.1~dfsg.1-4_amd64
% sudo cp p7zip_9.20.1