[Bug 944614] Re: ubiquity crashed with AttributeError in keyboard_variant_timeout(): 'NoneType' object has no attribute 'apply_keyboard'

[Stéphane Graber]

Oops, I forgot we cherry-picked that one into the precise branch of
ubiquity. SRU headers added.

** Description changed:

+ === Rational ===
+ Ubiquity crashes when a user quickly moves forward or back from the keyboard selection page. That's due to a gobject timeout still triggering even after the whole page has been destroyed.
+ 
+ === Test case ===
+ 1) Do a standard Ubuntu install, go through the page until the keyboard selection page
+ 2) Quickly move through the countries using the DOWN arrow key
+ 3) At any random point, stop and IMMEDIATELY (within the next second) click on BACK
+ 4) Without the fix, ubiquity would crash at that point
+ 
+ === Regression potential ===
+ None, we've had that patch in ubiquity for a while now and haven't seen any bug related to that part of the code show up since.
+ 
+ 
+ --- original bug report ---
  aanztaimaf
  
  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: ubiquity 2.9.23
  ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
  Uname: Linux 3.2.0-17-generic x86_64
  ApportVersion: 1.93-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.305
  Date: Fri Mar  2 23:49:57 2012
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InstallCmdLine: BOOT_IMAGE=/ubuntu/install/boot/vmlinuz debian-installer/custom-installation=/ubuntu/install/custom-installation iso-scan/filename=/ubuntu/install/installation.iso automatic-ubiquity noprompt quiet splash boot=casper ro debian-installer/locale=zh_CN.UTF-8 keyboard-configuration/layoutcode=us keyboard-configuration/variantcode= -- rootflags=sync
  InterpreterPath: /usr/bin/python2.7
  LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity --automatic --only
  ProcEnviron: Error: [Errno 13] 权限不够: '/proc/4733/environ'
  PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--automatic', '--only']
  SourcePackage: ubiquity
  Title: ubiquity crashed with AttributeError in keyboard_variant_timeout(): 'NoneType' object has no attribute 'apply_keyboard'
  Traceback:
-  Traceback (most recent call last):
-    File "/usr/lib/ubiquity/plugins/ubi-console-setup.py", line 130, in keyboard_variant_timeout
-      self.controller.dbfilter.apply_keyboard(layout, variant)
-  AttributeError: 'NoneType' object has no attribute 'apply_keyboard'
+  Traceback (most recent call last):
+    File "/usr/lib/ubiquity/plugins/ubi-console-setup.py", line 130, in keyboard_variant_timeout
+      self.controller.dbfilter.apply_keyboard(layout, variant)
+  AttributeError: 'NoneType' object has no attribute 'apply_keyboard'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

** Changed in: ubiquity (Ubuntu Precise)
       Status: Incomplete => In Progress

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https://bugs.launchpad.net/bugs/944614

Title:
  ubiquity crashed with AttributeError in keyboard_variant_timeout():
  'NoneType' object has no attribute 'apply_keyboard'

Status in “ubiquity” package in Ubuntu:
  Fix Released
Status in “ubiquity” source package in Precise:
  In Progress

Bug description:
  === Rational ===
  Ubiquity crashes when a user quickly moves forward or back from the keyboard selection page. That's due to a gobject timeout still triggering even after the whole page has been destroyed.

  === Test case ===
  1) Do a standard Ubuntu install, go through the page until the keyboard selection page
  2) Quickly move through the countries using the DOWN arrow key
  3) At any random point, stop and IMMEDIATELY (within the next second) click on BACK
  4) Without the fix, ubiquity would crash at that point

  === Regression potential ===
  None, we've had that patch in ubiquity for a while now and haven't seen any bug related to that part of the code show up since.

  
  --- original bug report ---
  aanztaimaf

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: ubiquity 2.9.23
  ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
  Uname: Linux 3.2.0-17-generic x86_64
  ApportVersion: 1.93-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.305
  Date: Fri Mar  2 23:49:57 2012
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InstallCmdLine: BOOT_IMAGE=/ubuntu/install/boot/vmlinuz debian-installer/custom-installation=/ubuntu/install/custom-installation iso-scan/filename=/ubuntu/install/installation.iso automatic-ubiquity noprompt quiet splash boot=casper ro debian-installer/locale=zh_CN.UTF-8 keyboard-configuration/layoutcode=us keyboard-configuration/variantcode= -- rootflags=sync
  InterpreterPath: /usr/bin/python2.7
  LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity --automatic --only
  ProcEnviron: Error: [Errno 13] 权限不够: '/proc/4733/environ'
  PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--automatic', '--only']
  SourcePackage: ubiquity
  Title: ubiquity crashed with AttributeError in keyboard_variant_timeout(): 'NoneType' object has no attribute 'apply_keyboard'
  Traceback:
   Traceback (most recent call last):
     File "/usr/lib/ubiquity/plugins/ubi-console-setup.py", line 130, in keyboard_variant_timeout
       self.controller.dbfilter.apply_keyboard(layout, variant)
   AttributeError: 'NoneType' object has no attribute 'apply_keyboard'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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