This looks like the same gtk_style_realize crash as in bug 81978, which was duped as part of bug 45008, but in this case, the crash was not as a result of being called after nsFilePicker::Show.
This looks like the same gtk_style_realize crash as in bug 81978, which was duped as part of bug 45008, but in this case, the crash was not as a result of being called after nsFilePicker::Show.