/usr/bin/pcmanfm:11:fm_desktop_item_accessible_ref_state_set:signal_is_needed:emit_event:property_event_listener:signal_emit_unlocked_R

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding pcmanfm. This problem was most recently seen with package version 1.3.1-1, the problem page at https://errors.ubuntu.com/problem/a3e3c3a40d821379ae25c46324a3f9259ffb0bb4 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.