Fwd: [abrt] Zim: pageview.py:4749:set_parsetree:AttributeError: 'NoneType' object has no attribute 'resolve_images'

[Robin Lee]

https://bugzilla.redhat.com/show_bug.cgi?id=1057414

Version-Release number of selected component:
Zim-0.60-2.fc20

Additional info:
reporter: libreport-2.1.11
cmdline: /usr/bin/python /usr/bin/zim --ipc-server-main /tmp/zim-korneta/zim-server-socket 30
executable: /usr/bin/zim
kernel: 3.12.8-300.fc20.x86_64
runlevel: N 5
type: Python
uid: 1001

Truncated backtrace:
pageview.py:4749:set_parsetree:AttributeError: 'NoneType' object has no attribute 'resolve_images'

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/zim/gui/__init__.py", line 3070, in discard
    self.ui.notebook.revert_page(self.page)
  File "/usr/lib/python2.7/site-packages/zim/notebook.py", line 1420, in revert_page
    store.revert_page(page)
  File "/usr/lib/python2.7/site-packages/zim/stores/files.py", line 113, in revert_page
    page.set_parsetree(newpage.get_parsetree())
  File "/usr/lib/python2.7/site-packages/zim/notebook.py", line 2385, in set_parsetree
    self._ui_object.set_parsetree(tree)
  File "/usr/lib/python2.7/site-packages/zim/gui/pageview.py", line 4749, in set_parsetree
    tree.resolve_images(self.ui.notebook, self.page)
AttributeError: 'NoneType' object has no attribute 'resolve_images'

Local variables in innermost frame:
buffer: <TextBuffer object at 0xff0870 (zim+gui+pageview+TextBuffer at 0xfdb8f0)>
tree: None
self: <PageView object at 0x7fb488d53280 (zim+gui+pageview+PageView at 0xeb41e0)>
istemplate: False