Program: 34484
Project: 34484
Buggy source:
@Override public void channelRead(final ChannelHandlerContext ctx,final Object msg) throws Exception {
  if (msg instanceof HttpRequest) {
    HttpRequest request=(HttpRequest)msg;
    if (status == 0) {
      status=1;
      ProtoUtil.RequestProto requestProto=ProtoUtil.getRequestProto(request);
      this.host=requestProto.getHost();
      this.port=requestProto.getPort();
      if ("String_Node_Str".equalsIgnoreCase(request.method().name())) {
        status=2;
        HttpResponse response=new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,HttpProxyServer.SUCCESS);
        ctx.writeAndFlush(response);
        ctx.channel().pipeline().remove("String_Node_Str");
        return;
      }
    }
    if (!httpProxyIntercept.beforeRequest(ctx.channel(),request)) {
      return;
    }
    handleProxyData(ctx.channel(),msg,true);
  }
 else   if (msg instanceof HttpContent) {
    if (status != 2) {
      if (!httpProxyIntercept.beforeRequest(ctx.channel(),(HttpContent)msg)) {
        return;
      }
      handleProxyData(ctx.channel(),msg,true);
    }
 else {
      status=1;
    }
  }
 else {
    ByteBuf byteBuf=(ByteBuf)msg;
    if (byteBuf.getByte(0) == 22) {
      isSSL=true;
      SslContext sslCtx=SslContextBuilder.forServer(HttpProxyServer.serverPriKey,CertPool.getCert(this.host)).build();
      ctx.pipeline().addFirst("String_Node_Str",new HttpServerCodec());
      ctx.pipeline().addFirst("String_Node_Str",sslCtx.newHandler(ctx.alloc()));
      ctx.pipeline().fireChannelRead(msg);
      return;
    }
    handleProxyData(ctx.channel(),msg,false);
  }
}

Fixed version (ground truth):
@Override public void channelRead(final ChannelHandlerContext ctx,final Object msg) throws Exception {
  if (msg instanceof HttpRequest) {
    HttpRequest request=(HttpRequest)msg;
    if (status == 0) {
      ProtoUtil.RequestProto requestProto=ProtoUtil.getRequestProto(request);
      if (requestProto == null) {
        ctx.channel().close();
        return;
      }
      status=1;
      this.host=requestProto.getHost();
      this.port=requestProto.getPort();
      if ("String_Node_Str".equalsIgnoreCase(request.method().name())) {
        status=2;
        HttpResponse response=new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,HttpProxyServer.SUCCESS);
        ctx.writeAndFlush(response);
        ctx.channel().pipeline().remove("String_Node_Str");
        return;
      }
    }
    if (!httpProxyIntercept.beforeRequest(ctx.channel(),request)) {
      return;
    }
    handleProxyData(ctx.channel(),msg,true);
  }
 else   if (msg instanceof HttpContent) {
    if (status != 2) {
      if (!httpProxyIntercept.beforeRequest(ctx.channel(),(HttpContent)msg)) {
        return;
      }
      handleProxyData(ctx.channel(),msg,true);
    }
 else {
      status=1;
    }
  }
 else {
    ByteBuf byteBuf=(ByteBuf)msg;
    if (byteBuf.getByte(0) == 22) {
      isSSL=true;
      SslContext sslCtx=SslContextBuilder.forServer(HttpProxyServer.serverPriKey,CertPool.getCert(this.host)).build();
      ctx.pipeline().addFirst("String_Node_Str",new HttpServerCodec());
      ctx.pipeline().addFirst("String_Node_Str",sslCtx.newHandler(ctx.alloc()));
      ctx.pipeline().fireChannelRead(msg);
      return;
    }
    handleProxyData(ctx.channel(),msg,false);
  }
}