NullPointerException in engineio parser callback

[gayatrimali]

I am using latest socket.io-client.java library in my android client. It internally uses engine.io-client.java 0.5.1 version. This library is giving NPE while sending a packet. Following is the stack trace. Please fix it soon. According to the stack trace, error is thrown in the following line.
self.ws.sendMessage(TEXT, new Buffer().writeUtf8((String) packet));
Can self.ws object be null in any scenario ?

java.lang.NullPointerException:
at com.github.nkzawa.engineio.client.transports.WebSocket$2.void call(java.lang.Object)()(SourceFile:148)
at com.github.nkzawa.engineio.parser.Parser.void encodePacket(com.github.nkzawa.engineio.parser.Packet,boolean,com.github.nkzawa.engineio.parser.Parser$EncodeCallback)()(SourceFile:63)
at com.github.nkzawa.engineio.parser.Parser.void encodePacket(com.github.nkzawa.engineio.parser.Packet,com.github.nkzawa.engineio.parser.Parser$EncodeCallback)()(SourceFile:42)
at com.github.nkzawa.engineio.client.transports.WebSocket.void write(com.github.nkzawa.engineio.parser.Packet[])()(SourceFile:143)
at com.github.nkzawa.engineio.client.Transport$3.void run()()(SourceFile:101)
at com.github.nkzawa.thread.EventThread.void exec(java.lang.Runnable)()(SourceFile:50)
at com.github.nkzawa.engineio.client.Transport.void send(com.github.nkzawa.engineio.parser.Packet[])()(SourceFile:97)
at com.github.nkzawa.engineio.client.Socket.void flush()()(SourceFile:611)
at com.github.nkzawa.engineio.client.Socket.void onDrain()()(SourceFile:602)
at com.github.nkzawa.engineio.client.Socket.void access$1000(com.github.nkzawa.engineio.client.Socket)()(SourceFile:30)
void access$1600(com.github.nkzawa.engineio.client.Socket,java.lang.String)
at com.github.nkzawa.engineio.client.Socket$6.void call(java.lang.Object[])()(SourceFile:295)
at com.github.nkzawa.emitter.Emitter.com.github.nkzawa.emitter.Emitter emit(java.lang.String,java.lang.Object[])()(SourceFile:117)
at com.github.nkzawa.engineio.client.transports.WebSocket$3.void run()()(SourceFile:163)
at com.github.nkzawa.thread.EventThread$2.void run()()(SourceFile:75)
at java.util.concurrent.ThreadPoolExecutor.runWorker()(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run()(ThreadPoolExecutor.java:587)
at java.lang.Thread.run()(Thread.java:848)

[nkzawa]

Thanks for your report. I think this was fixed on just released v0.6.0. Feel free to reopen if you still have the problem.