Hpack ArrayOutOfBound exception when client sends invalid index

20:32:14,723 ERROR [io.undertow] (default task-13) UT005085: Connection io.undertow.server.protocol.http2.Http2ServerConnection@4214cd96 for exchange HttpServerExchange{ GET / request {Host=[localhost:8443]} response {Last-Modified=[Sat, 29 Jul 2017 02:38:24 GMT], X-Powered-By=[Undertow/1], Server=[JBoss-EAP/7], Content-Length=[1517], Content-Type=[text/html], Accept-Ranges=[bytes], Date=[Tue, 08 Aug 2017 18:32:14 GMT], :status=[200]}} was not closed cleanly, forcibly closing connection
20:32:16,463 ERROR [org.xnio.listener] (default I/O-8) XNIO001007: A channel event listener threw an exception: java.lang.ArrayIndexOutOfBoundsException: -8
	at io.undertow.protocols.http2.HpackDecoder.handleIndex(HpackDecoder.java:293)
	at io.undertow.protocols.http2.HpackDecoder.decode(HpackDecoder.java:113)
	at io.undertow.protocols.http2.Http2HeaderBlockParser.handleData(Http2HeaderBlockParser.java:110)
	at io.undertow.protocols.http2.Http2PushBackParser.parse(Http2PushBackParser.java:62)
	at io.undertow.protocols.http2.Http2FrameHeaderParser.handle(Http2FrameHeaderParser.java:172)
	at io.undertow.protocols.http2.Http2Channel.parseFrame(Http2Channel.java:539)
	at io.undertow.server.protocol.framed.AbstractFramedChannel.receive(AbstractFramedChannel.java:427)
	at io.undertow.server.protocol.http2.Http2ReceiveListener.handleEvent(Http2ReceiveListener.java:108)
	at io.undertow.server.protocol.http2.Http2ReceiveListener.handleEvent(Http2ReceiveListener.java:59)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:932)
	at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:913)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
	at io.undertow.protocols.ssl.SslConduit$SslReadReadyHandler.readReady(SslConduit.java:1131)
	at io.undertow.protocols.ssl.SslConduit$1.run(SslConduit.java:168)
	at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:592)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:472)

HPACK: Header Compression for HTTP/2
  2. Compression Process Overview
    2.3. Indexing Tables
      2.3.3. Index Address Space
        ✔ 1: Sends a header field representation with invalid index