openlp-core team mailing list archive

[Azaziah <suutari.olli@xxxxxxxxx>]

Public bug reported:

If blank to x hotkey is held for a couple of seconds,
OpenLP becomes unresponsive and crashes.

Ideal solution would be to have the code execute only when
the key is pressed once, not when it's held.

Win 10 2.4.2 / trunk 2695

Usually it crashes before any traceback is created,
but here's PyCharm's console output:


C:\Python34\python.exe E:/bzr/openlp/remove-escape-item/openlp.py
Fatal Python error: Cannot recover from stack overflow.

Thread 0x00001808 (most recent call first):
  File "C:\Python34\lib\socketserver.py", line 154 in _eintr_retry
  File "C:\Python34\lib\socketserver.py", line 236 in serve_forever
  File "E:\bzr\openlp\remove-escape-item\openlp\plugins\remotes\lib\httpserver.py", line 123 in start_server
  File "E:\bzr\openlp\remove-escape-item\openlp\plugins\remotes\lib\httpserver.py", line 88 in run

Current thread 0x00002640 (most recent call first):
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 543 in show_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\common\registry.py", line 137 in execute
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1086 in hide_plugin
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1033 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 251 in set_normal_cursor
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 194 in hook_exception
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
  File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
  File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
  ...

** Affects: openlp
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of OpenLP
Core, which is subscribed to OpenLP.
https://bugs.launchpad.net/bugs/1622911

Title:
  Holding down blank hotkeys for a few seconds crashes OpenLP

Status in OpenLP:
  New

Bug description:
  If blank to x hotkey is held for a couple of seconds,
  OpenLP becomes unresponsive and crashes.

  Ideal solution would be to have the code execute only when
  the key is pressed once, not when it's held.

  Win 10 2.4.2 / trunk 2695

  Usually it crashes before any traceback is created,
  but here's PyCharm's console output:

  
  C:\Python34\python.exe E:/bzr/openlp/remove-escape-item/openlp.py
  Fatal Python error: Cannot recover from stack overflow.

  Thread 0x00001808 (most recent call first):
    File "C:\Python34\lib\socketserver.py", line 154 in _eintr_retry
    File "C:\Python34\lib\socketserver.py", line 236 in serve_forever
    File "E:\bzr\openlp\remove-escape-item\openlp\plugins\remotes\lib\httpserver.py", line 123 in start_server
    File "E:\bzr\openlp\remove-escape-item\openlp\plugins\remotes\lib\httpserver.py", line 88 in run

  Current thread 0x00002640 (most recent call first):
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 543 in show_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\common\registry.py", line 137 in execute
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1086 in hide_plugin
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1033 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 251 in set_normal_cursor
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 194 in hook_exception
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1180 in update_preview
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\slidecontroller.py", line 1034 in on_hide_display
    File "E:\bzr\openlp\remove-escape-item\openlp\core\__init__.py", line 237 in process_events
    File "E:\bzr\openlp\remove-escape-item\openlp\core\ui\maindisplay.py", line 399 in preview
    ...

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