/usr/bin/nautilus:11:nautilus_path_bar_size_allocate:gtk_widget_size_allocate_with_baseline:gtk_box_size_allocate_no_center:gtk_box_allocate_contents:gtk_css_gadget_allocate

The Ubuntu Error Tracker has been receiving reports about a problem regarding nautilus. This problem was most recently seen with package version 1:3.26.4-0ubuntu7.1, the problem page at https://errors.ubuntu.com/problem/00dc9cddf551a06041fc17b5e0d7b745973c0e56 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/.