Error message every time the wallpaper changes: Object Meta.Background (...), has been already deallocated - impossible to access to it
Every time the wallpaper changes, gnome-shell logs error:
Aug 22 10:06:33 kab gnome-shell[1313]: Object Meta.Background (0x55ba8c412500), has been already deallocated - impossible to access to it. This might be caused by the fact that the object has been destroyed from C code using something such as destroy(), dispose(), or remove() vfuncs
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: == Stack trace for context 0x55ba8be8b320 ==
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #0 0x55ba8c216e08 i resource:///org/gnome/shell/ui/background.js:721 (0x7f4a8260f560 @ 22)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #1 0x55ba8c216d80 i resource:///org/gnome/shell/ui/tweener.js:112 (0x7f4aa42d6808 @ 37)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #2 0x55ba8c216ce0 i resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (0x7f4aa42e0120 @ 54)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #3 0x55ba8c216bc0 i resource:///org/gnome/gjs/modules/tweener/tweener.js:342 (0x7f4aa42e01a8 @ 1742)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #4 0x55ba8c216b30 i resource:///org/gnome/gjs/modules/tweener/tweener.js:355 (0x7f4aa42e0230 @ 100)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #5 0x55ba8c216ab8 i resource:///org/gnome/gjs/modules/tweener/tweener.js:370 (0x7f4aa42e02b8 @ 10)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #6 0x55ba8c2169e8 i resource:///org/gnome/gjs/modules/signals.js:128 (0x7f4aa42c46f8 @ 386)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #7 0x55ba8c216958 i resource:///org/gnome/shell/ui/tweener.js:244 (0x7f4aa42da1a8 @ 159)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #8 0x55ba8c2168b0 i resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f4aa42b5e68 @ 71)
Aug 22 10:06:33 kab org.gnome.Shell.desktop[1313]: #9 0x55ba8c216830 i resource:///org/gnome/shell/ui/tweener.js:219 (0x7f4aa42da120 @ 15)
Downstream: https://launchpad.net/bugs/1787822