Comment 2 for bug 1063212

StacktraceTop:
 panel_indicator_entry_accessible_ref_child (accessible=0xa6ca5f8, i=0) at /build/buildd/unity-6.8.0/services/panel-indicator-entry-accessible.c:296
 atk_object_ref_accessible_child (accessible=accessible@entry=0xa6ca5f8, i=i@entry=0) at atkobject.c:827
 append_cache_item (obj=0xa6ca5f8, data=0xbfd42a28) at cache-adaptor.c:156
 g_hash_table_foreach (hash_table=0x9ff4058, func=func@entry=0xb6d1c990 <append_accessible_hf>, user_data=user_data@entry=0xbfd42a28) at /build/buildd/glib2.0-2.34.0/./glib/ghash.c:1524
 spi_cache_foreach (cache=0xa31b300, func=func@entry=0xb6d1c990 <append_accessible_hf>, data=data@entry=0xbfd42a28) at accessible-cache.c:428