Websockets crash on this.close() inside onerror()

[PoltoS]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffece39700 (LWP 32403)]
0x00007fffefb4ff54 in zwjs::Sockets::WebSocketClose (info=...) at Sockets.cpp:811
811 cn->Close();