Program: 186
Project: 186
Buggy source:
@Override public void messageReceived(ChannelHandlerContext ctx,MessageEvent e) throws Exception {
  if (ctx.getAttachment() instanceof DiscardEvent) {
    ctx.getChannel().setReadable(false);
    return;
  }
  NettyResponseFuture<?> future=(NettyResponseFuture<?>)ctx.getAttachment();
  Request request=future.getRequest();
  NettyAsyncResponse<?> asyncResponse=future.getAsyncResponse();
  HttpRequest nettyRequest=future.getNettyRequest();
  AsyncHandler<?> handler=future.getAsyncHandler();
  ChannelBuffer buf=asyncResponse.getBuffer();
  if (e.getMessage() instanceof HttpResponse) {
    HttpResponse response=(HttpResponse)e.getMessage();
    if (config.isRedirectEnabled() && response.getStatus().getCode() == 302 && (redirectCount + 1) < config.getMaxRedirects()) {
      HttpRequest r=construct(request,map(request.getType()),createUrl(response.getHeader(HttpHeaders.Names.LOCATION)));
      ctx.getChannel().write(r);
      return;
    }
    redirectCount=0;
    if (buf == null) {
      buf=ChannelBuffers.dynamicBuffer(MAX_BUFFERRED_BYTES);
      asyncResponse.setBuffer(buf);
    }
    asyncResponse.setResponse(response);
    log.debug("String_Node_Str" + response.getStatus());
    log.debug("String_Node_Str" + response.getProtocolVersion());
    log.debug("String_Node_Str");
    if (!response.getHeaderNames().isEmpty()) {
      for (      String name : response.getHeaderNames()) {
        log.debug("String_Node_Str" + name + "String_Node_Str"+ response.getHeaders(name));
      }
      log.debug("String_Node_Str");
    }
    if (handler != null) {
      if (update(handler,new HttpResponseHeaders(asyncResponse),ctx)) {
        ctx.setAttachment(new DiscardEvent());
        asyncResponse.getFuture().done();
        ctx.getChannel().setReadable(false);
        return;
      }
    }
    if (response.getStatus().getCode() != 200 || nettyRequest.getMethod().equals(HttpMethod.HEAD)) {
      asyncResponse.getFuture().done();
    }
  }
 else   if (e.getMessage() instanceof HttpChunk) {
    HttpChunk chunk=(HttpChunk)e.getMessage();
    if (buf == null) {
      buf=ChannelBuffers.dynamicBuffer(MAX_BUFFERRED_BYTES);
      asyncResponse.setBuffer(buf);
    }
    buf.writeBytes(chunk.getContent());
    if (chunk.isLast()) {
      asyncResponse.getFuture().done();
      if (chunk instanceof HttpChunkTrailer) {
        asyncResponse.setTrailingHeaders((HttpChunkTrailer)chunk);
      }
    }
    if (handler != null) {
      if (update(handler,new HttpResponseBody(asyncResponse,chunk),ctx) || chunk.isLast()) {
        ctx.setAttachment(new DiscardEvent());
        asyncResponse.getFuture().done();
        ctx.getChannel().setReadable(false);
        return;
      }
    }
  }
}

Fixed version (ground truth):
@Override public void messageReceived(ChannelHandlerContext ctx,MessageEvent e) throws Exception {
  if (ctx.getAttachment() instanceof DiscardEvent) {
    ctx.getChannel().setReadable(false);
    return;
  }
  NettyResponseFuture<?> future=(NettyResponseFuture<?>)ctx.getAttachment();
  Request request=future.getRequest();
  NettyAsyncResponse<?> asyncResponse=future.getAsyncResponse();
  HttpRequest nettyRequest=future.getNettyRequest();
  AsyncHandler<?> handler=future.getAsyncHandler();
  ChannelBuffer buf=asyncResponse.getBuffer();
  if (e.getMessage() instanceof HttpResponse) {
    HttpResponse response=(HttpResponse)e.getMessage();
    if (config.isRedirectEnabled() && response.getStatus().getCode() == 302 && (redirectCount + 1) < config.getMaxRedirects()) {
      HttpRequest r=construct(request,map(request.getType()),createUrl(response.getHeader(HttpHeaders.Names.LOCATION)));
      ctx.getChannel().write(r);
      return;
    }
    redirectCount=0;
    if (buf == null) {
      buf=ChannelBuffers.dynamicBuffer(MAX_BUFFERRED_BYTES);
      asyncResponse.setBuffer(buf);
    }
    asyncResponse.setResponse(response);
    log.debug("String_Node_Str" + response.getStatus());
    log.debug("String_Node_Str" + response.getProtocolVersion());
    log.debug("String_Node_Str");
    if (!response.getHeaderNames().isEmpty()) {
      for (      String name : response.getHeaderNames()) {
        log.debug("String_Node_Str" + name + "String_Node_Str"+ response.getHeaders(name));
      }
      log.debug("String_Node_Str");
    }
    if (handler != null) {
      if (update(handler,new HttpResponseHeaders(asyncResponse),ctx)) {
        ctx.setAttachment(new DiscardEvent());
        asyncResponse.getFuture().done();
        ctx.getChannel().setReadable(false);
        return;
      }
    }
    if (!response.isChunked() || response.getStatus().getCode() != 200 || nettyRequest.getMethod().equals(HttpMethod.HEAD)) {
      asyncResponse.getFuture().done();
    }
  }
 else   if (e.getMessage() instanceof HttpChunk) {
    HttpChunk chunk=(HttpChunk)e.getMessage();
    if (buf == null) {
      buf=ChannelBuffers.dynamicBuffer(MAX_BUFFERRED_BYTES);
      asyncResponse.setBuffer(buf);
    }
    buf.writeBytes(chunk.getContent());
    if (chunk.isLast()) {
      asyncResponse.getFuture().done();
      if (chunk instanceof HttpChunkTrailer) {
        asyncResponse.setTrailingHeaders((HttpChunkTrailer)chunk);
      }
    }
    if (handler != null) {
      if (update(handler,new HttpResponseBody(asyncResponse,chunk),ctx) || chunk.isLast()) {
        ctx.setAttachment(new DiscardEvent());
        asyncResponse.getFuture().done();
        ctx.getChannel().setReadable(false);
        return;
      }
    }
  }
}