Can confirm this here, on upgrade from xenial-proposed to yakkety- proposed.
The good news is, if you re-run the upgrade it works since the hexchat package gets unpacked afterwards. But obviously this needs to be fixed. Unpacking hexchat-python (2.12.0-2ubuntu2) over (2.10.2-1ubuntu3) ... Selecting previously unselected package hexchat-python3. Preparing to unpack .../hexchat-python3_2.12.0-2ubuntu2_amd64.deb ... Unpacking hexchat-python3 (2.12.0-2ubuntu2) ... Preparing to unpack .../hexchat-perl_2.12.0-2ubuntu2_amd64.deb ... Unpacking hexchat-perl (2.12.0-2ubuntu2) over (2.10.2-1ubuntu3) ... Preparing to unpack .../hexchat-plugins_2.12.0-2ubuntu2_amd64.deb ... Unpacking hexchat-plugins (2.12.0-2ubuntu2) over (2.10.2-1ubuntu3) ... dpkg: error processing archive /var/cache/apt/archives/hexchat-plugins_2.12.0-2ubuntu2_amd64.deb (--unpack): trying to overwrite '/usr/lib/x86_64-linux-gnu/pkgconfig/hexchat-plugin.pc', which is also in package hexchat 2.10.2-1ubuntu3 Preparing to unpack .../hexchat_2.12.0-2ubuntu2_amd64.deb ... Unpacking hexchat (2.12.0-2ubuntu2) over (2.10.2-1ubuntu3) ... Preparing to unpack .../hexchat-common_2.12.0-2ubuntu2_all.deb ... Unpacking hexchat-common (2.12.0-2ubuntu2) over (2.10.2-1ubuntu3) ... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1586239 Title: package hexchat-plugins 2.12.0-2ubuntu2 failed to install/upgrade: trying to overwrite '/usr/lib/x86_64-linux-gnu/pkgconfig/hexchat- plugin.pc', which is also in package hexchat 2.10.2-1ubuntu3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/hexchat/+bug/1586239/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs