Calibre started crashing on launch with my library. (I tried launching with a library at /tmp/empty and Calibre launched successfully.)
calibre-debug says:
Code:
Failed to contact running instance of calibre
Failed to connect to Listener at: /var/folders/y1/tlyysgm97jjg21yg4rx4hdt40000gp/T/tamara-calibre-gui.socket with error: QLocalSocket::connectToServer: Invalid name
which I have no idea how to interpret. The only somewhat unusual thing I did beforehand was playing with the calibredb command to list the library contents.