/usr/bin/pcmanfm:11:malloc_consolidate:_int_malloc:__GI___libc_malloc:_cairo_xlib_surface_create_internal:cairo_xlib_surface_create

The Ubuntu Error Tracker has been receiving reports about a problem regarding pcmanfm. This problem was most recently seen with package version 1.2.5-2ubuntu0.1, the problem page at https://errors.ubuntu.com/problem/be707d3412fc8daa5c10573a2c19a1f9054ecfb6 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/.