Thumbnail creation for animated gifs no longer works
It worked perfectly with Fedora 28 and gdk-pixbuf2 2.36.12, but since the update to Fedora 29 and gdk-pixbuf2 2.38.0, Nautilus can no longer generate thumbnails for animated gifs (it creates some files, but in ~/.cache/thumbnails/fail/...)
It was also okay in command line with Fedora 28, but with Fedora 29, I now get an error:
$ gdk-pixbuf-thumbnailer image.gif image.png
(gdk-pixbuf-thumbnailer:1625): GdkPixbuf-CRITICAL **: 02:17:55.510: gdk_pixbuf_save: assertion "error == NULL || *error == NULL' failed
(gdk-pixbuf-thumbnailer:1625): WARNING **: 02:17:55:55.510: Couldn't save the thumbnail 'image.png' for file "image.gif': Not all frames of the GIF image were loaded.
I tested several animated gif files from different sources, but I still get the same error.