[Bug 2054197] Re: update-manager crashed with TypeError in _look_busy(): constructor returned NULL

[Nathan Teodosio]

I can't reproduce this exact error, but I do get an error if the Gdk
imported is version 4:

>>> from gi.repository import Gdk
<stdin>:1: PyGIWarning: Gdk was imported without specifying a version first. Use gi.require_version('Gdk', '4.0') before import to ensure that the right version gets loaded.
>>> Gdk.Cursor.new(Gdk.CursorType.WATCH)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: type object 'Cursor' has no attribute 'new'. Did you mean: 'newv'?

After all the new constructor only exists in Gdk 3.

I see two possible solutions:

1. Do as suggested and require the specific Gdk version with 
   gi.require_version('Gdk', '3.0')

2. Use a constructor that exists in both Gdk versions:
   Gdk.Cursor.new_from_name("wait", None)


** Description changed:

- Nothing
+   File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 357, in _look_busy
+     self.get_window().set_cursor(Gdk.Cursor.new(Gdk.CursorType.WATCH))
+                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+ TypeError: constructor returned NULL
  
  ProblemType: Crash
  DistroRelease: Ubuntu 24.04
  Package: update-manager 1:24.04.4
  ProcVersionSignature: Ubuntu 6.6.0-14.14-generic 6.6.3
  Uname: Linux 6.6.0-14-generic x86_64
  ApportVersion: 2.27.0-0ubuntu6
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashCounter: 1
  CurrentDesktop: GNOME
  Date: Sat Feb 17 09:26:44 2024
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
-  b'com.ubuntu.update-manager' b'first-run' b'false'
-  b'com.ubuntu.update-manager' b'launch-count' b'178'
-  b'com.ubuntu.update-manager' b'launch-time' b'int64 1708179933'
+  b'com.ubuntu.update-manager' b'first-run' b'false'
+  b'com.ubuntu.update-manager' b'launch-count' b'178'
+  b'com.ubuntu.update-manager' b'launch-time' b'int64 1708179933'
  InstallationDate: Installed on 2023-10-01 (139 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
  InterpreterPath: /usr/bin/python3.11
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/update-manager
  ProcEnviron:
-  LANG=es_CO.UTF-8
-  LANGUAGE=es_CO:es
-  PATH=(custom, no user)
-  SHELL=/bin/bash
-  XDG_RUNTIME_DIR=<set>
+  LANG=es_CO.UTF-8
+  LANGUAGE=es_CO:es
+  PATH=(custom, no user)
+  SHELL=/bin/bash
+  XDG_RUNTIME_DIR=<set>
  Python3Details: /usr/bin/python3.11, Python 3.11.8, python3-minimal, 3.11.4-5ubuntu1
  PythonArgs: ['/usr/bin/update-manager']
  PythonDetails: N/A
  SourcePackage: update-manager
  Title: update-manager crashed with TypeError in _look_busy(): constructor returned NULL
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo

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https://bugs.launchpad.net/bugs/2054197

Title:
  update-manager crashed with TypeError in _look_busy(): constructor
  returned NULL

Status in update-manager package in Ubuntu:
  New

Bug description:
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 357, in _look_busy
      self.get_window().set_cursor(Gdk.Cursor.new(Gdk.CursorType.WATCH))
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  TypeError: constructor returned NULL

  ProblemType: Crash
  DistroRelease: Ubuntu 24.04
  Package: update-manager 1:24.04.4
  ProcVersionSignature: Ubuntu 6.6.0-14.14-generic 6.6.3
  Uname: Linux 6.6.0-14-generic x86_64
  ApportVersion: 2.27.0-0ubuntu6
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashCounter: 1
  CurrentDesktop: GNOME
  Date: Sat Feb 17 09:26:44 2024
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'launch-count' b'178'
   b'com.ubuntu.update-manager' b'launch-time' b'int64 1708179933'
  InstallationDate: Installed on 2023-10-01 (139 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
  InterpreterPath: /usr/bin/python3.11
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/update-manager
  ProcEnviron:
   LANG=es_CO.UTF-8
   LANGUAGE=es_CO:es
   PATH=(custom, no user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  Python3Details: /usr/bin/python3.11, Python 3.11.8, python3-minimal, 3.11.4-5ubuntu1
  PythonArgs: ['/usr/bin/update-manager']
  PythonDetails: N/A
  SourcePackage: update-manager
  Title: update-manager crashed with TypeError in _look_busy(): constructor returned NULL
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo

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