Plank crashes when trying to drag icons/ reorder icons

[James Bulman]

Whenever I try to drag icons around to reorder them or remove them from the dock it crashes and disappears. This happens whether or not the icon is docked or just has a window open
When running it through terminal when it crashes I am faced with this error:

[Gdk] The program 'plank' received an X Window System error.This probably reflects a bug in the program.The error was 'BadWindow (invalid Window parameter)'. (Details: serial 17182 error_code 3 request_code 141 (Composite) minor_code 8) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the GDK_SYNCHRONIZE environment variable to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.)
Trace/breakpoint trap

Linux Distribution - Linux Mint 17.2 XFCE variant
Plank Version - 0.10.1
Desktop Environment - xfce4 4.12
Window Management - xfwm4 4.12.3
Desktop - xfdesktop 4.12.2 built on GTK+ 2.24.23, linked with GTK+ 2.24.23
GTK2 = 2.24.23-0ubuntu1.2
GTK3 = 3.10.8~8+qiana
X.Org X Server 1.15.1

I have a dual GTX 680 graphics cards setup running the latest binary drivers (version 352.41) with dual monitors. SLI is currently off and Xinerama is on to make sure both of my monitors work properly. I can provide my xorg.conf if needed.

I installed plank by adding the deb http://ppa.launchpad.net/ricotz/docky/ubuntu trusty main ppa and running apt-get plank

If you require anything else please let me know and I will do my best to provide it. Running gdb --args plank -d returns nothing for some reason even if I run plank via the plank --debug command

[Rico Tzschichholz (ricotz)]

I can't do much without a backtrace.

GDK_SYNCHRONIZE=1 gdb --args plank -d
and "run"

[James Bulman (jamesbul2009)]

I have switched distribution now to Ubuntu Gnome 15.10 and it is working fine on here, I will try to install The Mint distro I have put above to get the backtrace but It might take a little while.
I have also removed one of my graphics cards so I am no longer running any sort of SLI

[Launchpad Janitor (janitor)]

[Expired for Plank because there has been no activity for 60 days.]

[Bryson (bhibb)]

I'm experiencing this same issue. I tried your debugging command above, and when I ran it I was not able to reproduce the crash. After I quit the command and launched plank through the UI in my launcher for XFCE, I could reproduce the issue.

Steps to reproduce:
1. Click UI in launcher for plank.
2. Click on one icon in plank.
3. Drag the icon to another location on plank.

After I did these steps I could reproduce the issue 100% of the time. Is there any other way to attach a debugger?

[Bryson (bhibb)]

To append my statement!

I could reproduce this issue only in the method described.

When I caused plank to run on startup of the machine, I no longer encounter the issue!

This was Ubuntu 19.04, by the way. I imagine I could still work to resolve the issue if necessary, but it seems to make more sense to have plank start on bootup.

Thanks!