dead letters crash

[Allen Winter]

I've been using hand-built kde-pim master inside my KDE 16.08 desktop
worked fine for a couple days.

But today I get this crash.  Looks familiar but I can't recall the trick to making it run again.
any remember?  was it an autosave file I need to remove?
the core file has no symbols for some reason.


org.kde.pim.akonadicore: "QLocalSocket::connectToServer: Invalid name" "/home/allen/.local-dev/share/akonadi/instance/devel/akonadiserver-cmd.socket"
org.kde.pim.akonadicore: "QLocalSocket::connectToServer: Invalid name" "/home/allen/.local-dev/share/akonadi/instance/devel/akonadiserver-cmd.socket"
org.kde.pim.webengineviewer:  It's not necessary to check database now
*** KMail got signal 11 (Exiting)
*** Dead letters dumped.
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = kontact path = /home/data/kde/inst/5/bin pid = 19140
KCrash: Arguments: /home/data/kde/inst/5/bin/kontact 
Segmentation fault (core dumped)