# Steps to reproduce
0. have a mouse with horizontal scrolling functionality (mine is a Microsoft Comfort Mouse 4500 with a tilting action for horizontal scroll)
1. move mouse pointer over the dock
2. use the mouse scroller to scroll horizontally

# What I expect to happen
Nothing

# What happens
Mouse pointer and everything on screen freezes. After a few seconds it unfreezes, but all the icons from the dock are missing. I have to log out and back in to restore the dock.

# Other info
Slightly similar to LP #1875106, but I’m not using imwheel.

I am using Wayland.

Syslog seems to always point to this one function: ”The offending callback was get_preferred_height(), a vfunc”. I’ll attach the relevant part from one crash.

I wonder what are the changes of getting pwned on one of those nowadays, with all the known security holes. Could be not even the crooks bother anymore though.