Comment 2 for bug 1725101

StacktraceTop:
 g_str_hash (v=0x0) at ../../../../glib/ghash.c:1882
 g_hash_table_lookup_node (hash_return=<synthetic pointer>, key=0x0, hash_table=0x559e881ac300) at ../../../../glib/ghash.c:379
 g_hash_table_lookup (hash_table=0x559e881ac300, key=key@entry=0x0) at ../../../../glib/ghash.c:1153
 get_store_snap (error=0x0, cancellable=0x559e882498d0, name=0x0, plugin=0x559e88132110) at ../plugins/snap/gs-plugin-snap.c:602
 gs_plugin_refine_app (plugin=<optimized out>, app=<optimized out>, flags=48367098, cancellable=0x559e882498d0, error=0x7fdcef495928) at ../plugins/snap/gs-plugin-snap.c:707