List of displayed applications duplicates after searching in “What's new”/“Top Rated”

[Michal Predotka]

software-center 5.0.3.1, Ubuntu 11.10
software-center 13.10, Ubuntu 14.04

Steps to reproduce:
1. Start USC
2. Click “More” in “Top Rated” section
3. Enter anything in the search bar
4. Clear search bar
5. Scroll application list

Result:
List of application is duplicated.
<https://launchpadlibrarian.net/89837982/usc_problem.webm>

[Gary Lasker (gary-lasker)]

Thank you for noticing this and reporting it, mmiicc! We'll try to get this fix in asap.

Your help is much appreciated!

[Robert Roth (evfool)]

I have investigated this issue, and the problem is that the _refresh_apps_with_app_cache method after the back button press is invoked twice, with the following stacktraces (removed most of the common part from the traces, like Gtk.main(), etc):

1. File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/widgets/backforward.py", line 83, in on_clicked
    self.emit(button.signal_name)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/viewmanager.py", line 85, in on_nav_back_clicked
    pane.on_nav_back_clicked(widget)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/panes/softwarepane.py", line 277, in on_nav_back_clicked
    vm.nav_back()
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/viewmanager.py", line 221, in nav_back
    self.navhistory.nav_back()
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/navhistory.py", line 77, in nav_back
    nav_item.navigate_to()
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/navhistory.py", line 139, in navigate_to
    self.view_state, self.callback)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/viewmanager.py", line 195, in display_page
    callback(page, view_state)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/panes/availablepane.py", line 678, in display_app_view_page
    self.refresh_apps()
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/panes/availablepane.py", line 813, in refresh_apps
    SoftwarePane.refresh_apps(self, query)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/panes/softwarepane.py", line 417, in refresh_apps
    self._refresh_apps_with_apt_cache(query)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/utils.py", line 119, in wrapper
    f(*args, **kwargs)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/panes/softwarepane.py", line 439, in _refresh_apps_with_apt_cache
    traceback.print_stack()

2. File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/widgets/backforward.py", line 83, in on_clicked
    self.emit(button.signal_name)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/viewmanager.py", line 85, in on_nav_back_clicked
    pane.on_nav_back_clicked(widget)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/panes/softwarepane.py", line 277, in on_nav_back_clicked
    vm.nav_back()
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/viewmanager.py", line 221, in nav_back
    self.navhistory.nav_back()
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/navhistory.py", line 77, in nav_back
    nav_item.navigate_to()
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/navhistory.py", line 139, in navigate_to
    self.view_state, self.callback)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/session/viewmanager.py", line 195, in display_page
    callback(page, view_state)
  File "/home/evfool/Projects/ubuntu/sctrunk/softwarecenter/ui/gtk3/panes/availablepane.py", line 678, in d...

[dino99 (9d9)]

That version is no more maintained

[Matthew Paul Thomas (mpt)]

This still occurs with "Top Rated" in 14.04. When I follow the steps with "What's New", I get a spinner indefinitely, which is also wrong.