Comment 2 for bug 959068

StacktraceTop:
 g_assertion_message (domain=<optimized out>, file=<optimized out>, line=<optimized out>, func=0x7ff9ebb43aa0 "gee_hash_map_node_iterator_next", message=0x30a1630 "assertion failed: (_tmp0_ == _tmp2_)") at /build/buildd/glib2.0-2.31.20/./glib/gtestutils.c:1860
 g_assertion_message_expr (domain=0x0, file=0x7ff9ebb43449 "hashmap.c", line=2621, func=0x7ff9ebb43aa0 "gee_hash_map_node_iterator_next", expr=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gtestutils.c:1871
 gee_hash_map_node_iterator_next (self=<optimized out>) at hashmap.c:2621
 gee_hash_map_node_iterator_next (self=0x2191550) at hashmap.c:2609
 ___lambda13_ (_i=0x3755750, _m=<optimized out>, self=0x215ecf0) at /storage/1/src/gwibber/trunk/libgwibber/streams.vala:216