Comment 2 for bug 1727175

StacktraceTop:
 g_type_check_instance_is_fundamentally_a (type_instance=type_instance@entry=0x7f4120017280, fundamental_type=fundamental_type@entry=80) at ../../../../gobject/gtype.c:4025
 g_object_unref (_object=0x7f4120017280) at ../../../../gobject/gobject.c:3227
 g_hash_table_insert_node (hash_table=hash_table@entry=0x5571abb7d860, node_index=node_index@entry=3, key_hash=key_hash@entry=2090329265, new_key=new_key@entry=0x7f4110015190, new_value=new_value@entry=0x7f412001a490, keep_new_key=keep_new_key@entry=0, reusing_key=0) at ../../../../glib/ghash.c:997
 g_hash_table_insert_internal (hash_table=0x5571abb7d860, key=0x7f4110015190, value=0x7f412001a490, keep_new_key=0) at ../../../../glib/ghash.c:1235
 find_snaps (plugin=plugin@entry=0x5571abb0b2f0, flags=flags@entry=SNAPD_FIND_FLAGS_NONE, section=section@entry=0x7f4135941161 "featured", query=query@entry=0x0, cancellable=cancellable@entry=0x7f413c0224e0, error=error@entry=0x7f4132a539c8) at ../plugins/snap/gs-plugin-snap.c:273