swaybar crashes after you hover the mouse pointer over it

To reproduce the issue:
$ swaybar --bar_id=bar-0
2019-07-11 14:00:00 - [swaybar/tray/tray.c:42] Failed to connect to user bus: No such file or directory
(At this moment the bar works fine)
After I hover the mouse over it, the bar disappears and the following appears on the shell:
Segmentation fault

(from redmine: issue id 10673, created on 2019-07-11)