#14 - I'm honestly not sure; I expected dependent packages to complain about the downgrade, but they didn't.
(Note: It's likely that all relevant architectures must be installed with the same dpkg command. Maybe it'll work if you use --force-depends?)
This worked for me:
$ sudo dpkg -i gcc-4.9-base_4.9.2-10ubuntu13_amd64.deb gcc-4.9-base_4.9.2-10ubuntu13_i386.deb $ sudo do-release-upgrade
#14 - I'm honestly not sure; I expected dependent packages to complain about the downgrade, but they didn't.
(Note: It's likely that all relevant architectures must be installed with the same dpkg command. Maybe it'll work if you use --force-depends?)
This worked for me:
$ sudo dpkg -i gcc-4.9- base_4. 9.2-10ubuntu13_ amd64.deb gcc-4.9- base_4. 9.2-10ubuntu13_ i386.deb
$ sudo do-release-upgrade