Comment 2 for bug 960737

StacktraceTop:
 bson_append_string (b=0x7fffb64d16f0, name=0x997b60 "UserGroups", value=0x0) at lib/bson/bson.c:744
 g_hash_table_foreach (hash_table=0x98a460, func=0x402ef1 <append_key_value>, user_data=0x7fffb64d16f0) at /build/buildd/glib2.0-2.31.22/./glib/ghash.c:1524
 bsonify (report=0x98a460, b=0x7fffb64d16f0, bson_message=0x7fffb64d1798, bson_message_len=0x7fffb64d17bc) at src/whoopsie.c:215
 parse_and_upload_report (crash_file=<optimized out>) at src/whoopsie.c:521
 create_file (upload=0x9aef20 "/var/crash/_usr_lib_gnome-settings-daemon_gnome-settings-daemon.104.upload") at src/whoopsie.c:572