Comment 2 for bug 1560900

Also seen for other MPs:

https://mir-jenkins.ubuntu.com/job/device-runtests-mir/device_type=krillin/232/consoleFull

18:02:02 Signal 15 received. Good night.
18:02:11 /home/phablet/mir-testrunner/mir-smoke-test-runner.sh: line 23: 10036 Segmentation fault (core dumped) ${root}mir_demo_server --test-timeout=$timeout --test-client $root$client
18:02:11 I: [FAILED] mir_demo_client_scroll

https://mir-jenkins.ubuntu.com/job/device-runtests-mir/device_type=krillin/228/console

09:01:13 Signal 15 received. Good night.
09:01:22 /home/phablet/mir-testrunner/mir-smoke-test-runner.sh: line 23: 10055 Segmentation fault (core dumped) ${root}mir_demo_server --test-timeout=$timeout --test-client $root$client
09:01:22 I: [FAILED] mir_demo_client_scroll