[set_location] Opening configuration window crashes Gajim

Having installed libchamplain and its dependencies, I am able to see the map, set my location/save presents and so on.

Opening the configuration window a second time crashes Gajim with "Speicherzugriffsfehler (Speicherabzug geschrieben)" (crash dump written).

Debugging this with gdb leads to the following message:

Thread 1 "g" received signal SIGSEGV, Segmentation fault. 0x00007fffa730d537 in ?? () from /usr/lib/libchamplain-0.12.so.0

I was able to narrow the error down to this line:

https://dev.gajim.org/gajim/gajim-plugins/blob/master/set_location/set_location.py#L181

self.contacts_layer.destroy()

Commenting this line out seems to prevent the crash.

System:

• Manjaro (Arch)
• libchamplain 0.12.16-1
• gajim-git
• set_location 0.7.3 (latest)