https://bugs.kde.org/show_bug.cgi?id=378368
--- Comment #4 from Bogdan Mihaila <bogdan.miha...@gmx.de> --- @idoitprone I can confirm the new woes after updating today. Kmail/Kontact crashes again on startup due to a missing symbol. Did some investigation on the new missing symbols and here is how to fix those temporarily by downgrading packages. kmail: symbol lookup error: /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5: undefined symbol: _ZN10MailCommon24FavoriteCollectionWidget19prefereCreateNewTabEb can be fixed by downgrading libkf5mailcommon5 to sudo apt install libkf5mailcommon5=4:16.12.3+p16.04+git20170310.0437-0 then one will run into another missing symbol: kmail: symbol lookup error: /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5: undefined symbol: _ZN4KPIM15ProgressManager18createProgressItemEPNS_12ProgressItemERKN7Akonadi13AgentInstanceERK7QStringS9_S9_bNS1_12CryptoStatusE can be fixed by downgrading libkf5libkdepim5 to sudo apt install libkf5libkdepim5=4:16.12.3+p16.04+git20170310.0145-0 then one will run into another missing symbol: kmail: symbol lookup error: /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5: undefined symbol: _ZN9PimCommon4Util12isImapFolderERKN7Akonadi10CollectionERb can be fixed by downgrading libkf5pimcommon5 to sudo apt install libkf5pimcommon5=4:16.12.3+p16.04+git20170310.0207-0 and now finally the hunt ends and Kmail starts again without crashing. It seems though that the missing symbol from my initial post #1 is fixed but now we got 3 new missing ones instead. Guess there is some refactoring going on in KDEPIM and Neon builds do not manage to build from the right versions of the libraries so that symbols are missing each time. As hunting those down manually and downgrading libraries without version conflicts and blockers is getting tedious and might not work with next upgrade I highly recommend to not upgrade any KDEPIM related libraries until this gets to a stable state. Otherwise KMail and others will be non-functional with the next upgrade and who knows how long it takes for it to get fixed. Not having emails and calendar for weeks doesn't seem tempting. -- You are receiving this mail because: You are watching all bug changes.