nautilus: Thumbnail generation fails

[mat8913]

Issue description

Thumbnails do not get generated for files. Instead, a 1x1 png file gets written to ~/.cache/thumbnails/fail/gnome-thumbnail-factory/.

Here's the relevant terminal output:

** (nautilus:22461): DEBUG: 23:12:58.008: (Thumbnail Thread) Creating thumbnail: file:///home/matthew/test.png

(nautilus:22461): GnomeDesktop-DEBUG: 23:12:58.009: About to launch script: @BUBBLEWRAP_BIN@ --ro-bind /nix/store /nix/store --proc /proc --dev /dev --chdir / --setenv GIO_USE_VFS local --unshare-all --die-with-parent --setenv G_MESSAGES_DEBUG all --ro-bind /nix/store/ng63219ysswhs4zy6g48m26vqcz55154-gnome-desktop-3.28.2 /nix/store/ng63219ysswhs4zy6g48m26vqcz55154-gnome-desktop-3.28.2 --bind /tmp/gnome-desktop-thumbnailer-0YNMSZ /tmp --ro-bind /home/matthew/test.png /tmp/gnome-desktop-file-to-thumbnail.png --seccomp 30 /nix/store/hjszk4pmhiwby9nlslh8mhvhrvdnbj9c-gdk-pixbuf-2.36.12/bin/gdk-pixbuf-thumbnailer -s 256 file:///tmp/gnome-desktop-file-to-thumbnail.png /tmp/gnome-desktop-thumbnailer.png 

(nautilus:22461): GnomeDesktop-DEBUG: 23:12:58.015: Failed to launch script: Failed to execute child process “@BUBBLEWRAP_BIN@” (No such file or directory)
(nautilus:22461): GnomeDesktop-DEBUG: 23:12:58.015: Thumbnail script ('/nix/store/hjszk4pmhiwby9nlslh8mhvhrvdnbj9c-gdk-pixbuf-2.36.12/bin/gdk-pixbuf-thumbnailer -s %s %u %o') failed for 'file:///home/matthew/test.png': Failed to execute child process “@BUBBLEWRAP_BIN@” (No such file or directory)
** (nautilus:22461): DEBUG: 23:12:58.015: (Thumbnail Thread) Thumbnail failed: file:///home/matthew/test.png

I'm guessing this is caused by #28086 and 6e2c115.

Steps to reproduce

Open nautilus in a folder containing images.

Technical details

Please run nix-shell -p nix-info --run "nix-info -m" and paste the
results.

• system: "x86_64-linux"
• host os: Linux 4.18.17, NixOS, 18.09.1206.6d6e4e6b558 (Jellyfish)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.1.1
• channels(root): "nixos-18.09.1228.a4c4cbb613c"
• nixpkgs: /home/matthew/.nix-defexpr

[jtojnar]

Fixed in #45950

[hedning]

I think the fix wasn't sufficient on 3.30 :/ I'm able to reproduce on master at least. IIRC I only checked the fix worked with 3.28.

[pbogdan]

It seems that patch may need to be applied directly to Nautilus too as it now seems to bundle that code? - https://gitlab.gnome.org/GNOME/nautilus/blob/master/src/gnome-desktop/gnome-desktop-thumbnail-script.c