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[Philipp <2095129@xxxxxxxxxxxxxxxxxx>]

Hi Timo,

I have tested the proposed nautilus package on Ubuntu 24.04 and I can
confirm this issue is now fixed.

Tested the test plan mentioned above with nautilus version
1:46.4-0ubuntu0.1.

Thanks a lot!

** Tags removed: verification-needed-noble
** Tags added: verification-done-noble

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https://bugs.launchpad.net/bugs/2095129

Title:
  Nautilus crashes when update_file_info_full is running and the folder
  is being left

Status in nautilus package in Ubuntu:
  Fix Released
Status in nautilus source package in Noble:
  Fix Committed

Bug description:
  [ Impact ]

  Nautilus crashes if nautilus-python is installed and
  update_file_info_full is running and the folder is being left. This
  happens because of a NULL deref.

  My patch checks for NULL and returns to avoid the NULL deref.

  [ Test Plan ]

  1. Install python3-nautilus
  2. Copy test.py to ~/.local/share/nautilus-python/extensions/ (https://gitlab.gnome.org/-/project/1/uploads/4becd588cc4db8294e9154813e814224/test.py)
  3. create an empty folder and open a terminal and run mkdir test_{1..500} to create a lot of empty folders in your new directory
  4. kill nautilus with nautilus -q
  5. restart nautilus with nautilus --no-desktop
  6. navigate to your folder
  7. immediately go back to the parent folder, i.e. press alt+arrow-key-up
  8. repeat folder navigation multiple times

  Nautilus should not crash.

  [ Where problems could occur ]

  Since the extension functions return now prematurely, some of the code
  paths are no longer being executed, i.e. a g_object_unref or
  finish_info_provider. This might lead to a memory leak or undefined
  extension behavior.

  Instead of crashing nautilus will output an error message.

  This fix is being included in the 46.4 SRU: bug 2108849

  [ Other Info ]

  Upstream MR: https://gitlab.gnome.org/GNOME/nautilus/-/merge_requests/1662
  Upstream issue: https://gitlab.gnome.org/GNOME/nautilus/-/issues/3505

  Since nautilus-python is not preinstalled and an extension which calls
  the async method is required, this crash and this patch does not
  affect a Ubuntu standard installation and therefore most of the Ubuntu
  users.

  Nonetheless I think this crash especially affects developers who use
  Ubuntu and a tool like turtle
  (https://gitlab.gnome.org/philippun1/turtle), which uses the nautilus
  python extension to calculate git status emblems.

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