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3.38 regression, file previews aren't working

  1. Click on PNG file in Files
  2. Press spacebar

Fedora Workstation 32 -> a preview window appears, showing the image
nautilus-3.36.3-1.fc32.x86_64
sushi-3.34.0-2.fc32.x86_64

Fedora Workstation 33 -> nothing happens; but the following is recorded in the journal
nautilus-3.38.0-1.fc33.x86_64
sushi-3.34.0-3.fc33.x86_64

Downstream bug https://bugzilla.redhat.com/show_bug.cgi?id=1880752

Sep 19 12:07:12 localhost.localdomain systemd[1706]: Started dbus-:1.2-org.gnome.NautilusPreviewer@0.service.
Sep 19 12:07:13 localhost.localdomain org.gnome.Nauti[2546]: Object .Gjs_ImageRenderer (0x5581ece29210), has been already deallocated — impossible to access it. This might be caused by the object having been destroyed from C code using something such as destroy(), dispose(), or remove() vfuncs.
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: == Stack trace for context 0x5581ecc9f1a0 ==
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #0   5581eccc6dd0 i   resource:///org/gnome/NautilusPreviewer/js/viewers/image.js:138 (2a21b9cdcdd0 @ 41)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #1   5581eccc6d20 i   resource:///org/gnome/NautilusPreviewer/js/viewers/image.js:166 (2a21b9cdcc90 @ 55)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #2   5581eccc6c70 i   resource:///org/gnome/NautilusPreviewer/js/viewers/image.js:153 (2a21b9cdcd30 @ 143)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #3   5581eccc6bd0 i   resource:///org/gnome/NautilusPreviewer/js/ui/main.js:57 (2a21b9cb5740 @ 136)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #4   5581eccc6b30 i   resource:///org/gnome/gjs/modules/script/package.js:222 (2a21b9c83380 @ 45)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #5   5581eccc6aa0 i   /usr/libexec/org.gnome.NautilusPreviewer:9 (2a21b9c83100 @ 58)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: == Stack trace for context 0x5581ecc9f1a0 ==
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #0   5581eccc6e60 i   resource:///org/gnome/NautilusPreviewer/js/ui/renderer.js:29 (2a21b9cc5d30 @ 33)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #1   5581eccc6dd0 i   resource:///org/gnome/NautilusPreviewer/js/viewers/image.js:139 (2a21b9cdcdd0 @ 56)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #2   5581eccc6d20 i   resource:///org/gnome/NautilusPreviewer/js/viewers/image.js:166 (2a21b9cdcc90 @ 55)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #3   5581eccc6c70 i   resource:///org/gnome/NautilusPreviewer/js/viewers/image.js:153 (2a21b9cdcd30 @ 143)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #4   5581eccc6bd0 i   resource:///org/gnome/NautilusPreviewer/js/ui/main.js:57 (2a21b9cb5740 @ 136)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #5   5581eccc6b30 i   resource:///org/gnome/gjs/modules/script/package.js:222 (2a21b9c83380 @ 45)
Sep 19 12:07:13 localhost.localdomain org.gnome.NautilusPreviewer[2546]: #6   5581eccc6aa0 i   /usr/libexec/org.gnome.NautilusPreviewer:9 (2a21b9c83100 @ 58)
Sep 19 12:07:13 localhost.localdomain org.gnome.Nauti[2546]: gtk_widget_queue_resize: assertion 'GTK_IS_WIDGET (widget)' failed
Sep 19 12:07:13 localhost.localdomain org.gnome.Nauti[2546]: Object .Gjs_ImageRenderer (0x5581ece29210), has been already deallocated — impossible to access it. This might be caused by the object having been destroyed from C code using something such as destroy(), dispose(), or remove() vfuncs.
Sep 19 12:07:13 localhost.localdomain org.gnome.Nauti[2546]: g_object_notify: assertion 'G_IS_OBJECT (object)' failed
Edited by cmurf