套接字:错误:单独的代理项 U+D83D 不是标量值

最近我的节点.js服务器由于这个socket.io错误而崩溃了很多。我怀疑客户端正在发送无效的 utf 字符串，这会在utf8.js文件中抛出错误。有没有办法避免服务器崩溃？这非常令人沮丧。如果需要，我会给猴子修补这个文件。

Error: Lone surrogate U+D83D is not a scalar value
at Error (native)
at checkScalarValue (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/node_modules/utf8/utf8.js:69:10)
at encodeCodePoint (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/node_modules/utf8/utf8.js:90:4)
at Object.utf8encode [as encode] (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/node_modules/utf8/utf8.js:111:18)
at Object.exports.encodePacket (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:74:34)
at encodeOne (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:387:13)
at eachWithIndex (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:256:5)
at map (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:263:5)
at Object.exports.encodePayloadAsBinary (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:411:3)
at Object.exports.encodePayload (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:225:20)
at XHR.Polling.send (/root/node_modules/socket.io/node_modules/engine.io/lib/transports/polling.js:238:10)
at Socket.flush (/root/node_modules/socket.io/node_modules/engine.io/lib/socket.js:341:20)
at Socket.sendPacket (/root/node_modules/socket.io/node_modules/engine.io/lib/socket.js:317:10)
at Socket.send.Socket.write (/root/node_modules/socket.io/node_modules/engine.io/lib/socket.js:290:8)
at writeToEngine (/root/node_modules/socket.io/lib/client.js:148:17)
at Client.packet (/root/node_modules/socket.io/lib/client.js:159:7)