Synapse, installed from the official repo, crashes after typing anything:
khajvah@khajvah-work:~$ synapse
[INFO 17:09:14.234703] [synapse-main:266] Starting up...
[INFO 17:09:14.304390] [synapse-main:208] Binding activation to <Control>space
[INFO 17:09:14.357984] [view-base:251] Screen is composited.
[INFO 17:09:14.359002] [controller:57] Using xim input method.
[WARN 17:09:14.417119] [desktop-file-service:343] Desktop session type is not recognized, assuming GNOME.
[WARN 17:09:14.473902] [ssh-plugin:114] /home/khajvah/.ssh/config: Error opening file: No such file or directory
[INFO 17:09:14.482539] [hybrid-search-plugin:179] keeps in cache now 366 file names
Segmentation fault (core dumped)
Workaround
The version from ppa:synapse-core/testing
works fine.