Comment 9 for bug 1494804

The upstream developer (on the linked bug) asked if you could provide the following information if you can reproduce the crash.

"* what accounts he/she has configured, whether any are from Ubuntu Online
  Accounts or GNOME Online Accounts
* whether it crashes also when he/she runs the evolution-source-registry
  from a terminal manually
* whether running the source registry under valgrind will also reproduce the
  crash (it can happen that other timing, due to all slowness caused by the
  memory checking, will not trigger the crash, but also that the valgrind will
  log about the issue and will keep the application running). The command
  might look like (I do not know exact location of the executable, thus
  it can differ in your distribution):
  $ G_SLICE=always-malloc valgrind /usr/libexec/evolution-source-registry &>log"

For the last point you'll need to `apt get install valgrind' and then please attach "log" afterwards.