io.netty.channel.AbstractChannelHandlerContext invokeExceptionCaught

in 0.7-alpha2 I get the following sporadic error (and nothing else) when doing a `post` and :
```clojure
(->>@(http/post URL params))
:body
cbs/to-line-seq
(map (fn [data]
(when log-fn (log-fn data))
data))
(stream/transform sse->data-xf))
```
```java
io.netty.channel.AbstractChannelHandlerContext invokeExceptionCaught
WARNING: An exception 'java.lang.ClassCastException: class java.lang.ClassCastException cannot be cast to class [B (java.lang.ClassCastException and [B are in module java.base of loader 'bootstrap')' [enable DEBUG level for full stacktrace] was thrown by a user handler's exceptionCaught() method while handling the following exception:
java.lang.ClassCastException: class io.netty.handler.codec.http2.Http2Exception cannot be cast to class [B (io.netty.handler.codec.http2.Http2Exception is in unnamed module of loader 'app'; [B is in module java.base of loader 'bootstrap')
at aleph.http.client$http2_client_handler$fn__66167.invoke(client.clj:507)
at manifold.stream.BufferedStream.put(stream.clj:885)
at aleph.http.client$http2_client_handler$handle_error__66173.invoke(client.clj:520)
at aleph.http.client$http2_client_handler$handle_shutdown_frame__66178.invoke(client.clj:540)
at aleph.http.client$http2_client_handler$reify__66182.userEventTriggered(client.clj:582)
at io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:400)
at io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
at io.netty.channel.AbstractChannelHandlerContext.fireUserEventTriggered(AbstractChannelHandlerContext.java:368)
at io.netty.handler.logging.LoggingHandler.userEventTriggered(LoggingHandler.java:222)
at io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:398)
at io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
at io.netty.channel.AbstractChannelHandlerContext.fireUserEventTriggered(AbstractChannelHandlerContext.java:368)
at io.netty.channel.DefaultChannelPipeline$HeadContext.userEventTriggered(DefaultChannelPipeline.java:1428)
at io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:396)
at io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
at io.netty.channel.DefaultChannelPipeline.fireUserEventTriggered(DefaultChannelPipeline.java:913)
at io.netty.handler.codec.http2.Http2MultiplexHandler.channelRead(Http2MultiplexHandler.java:181)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at io.netty.handler.codec.http2.Http2FrameCodec.onHttp2Frame(Http2FrameCodec.java:712)
at io.netty.handler.codec.http2.Http2FrameCodec$FrameListener.onRstStreamRead(Http2FrameCodec.java:622)
at io.netty.handler.codec.http2.Http2FrameListenerDecorator.onRstStreamRead(Http2FrameListenerDecorator.java:59)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder$FrameReadListener.onRstStreamRead(DefaultHttp2ConnectionDecoder.java:442)
at io.netty.handler.codec.http2.Http2InboundFrameLogger$1.onRstStreamRead(Http2InboundFrameLogger.java:80)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.readRstStreamFrame(DefaultHttp2FrameReader.java:509)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.processPayloadState(DefaultHttp2FrameReader.java:259)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.readFrame(DefaultHttp2FrameReader.java:159)
at io.netty.handler.codec.http2.Http2InboundFrameLogger.readFrame(Http2InboundFrameLogger.java:41)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder.decodeFrame(DefaultHttp2ConnectionDecoder.java:173)
at io.netty.handler.codec.http2.DecoratingHttp2ConnectionDecoder.decodeFrame(DecoratingHttp2ConnectionDecoder.java:63)
at io.netty.handler.codec.http2.Http2ConnectionHandler$FrameDecoder.decode(Http2ConnectionHandler.java:393)
at io.netty.handler.codec.http2.Http2ConnectionHandler.decode(Http2ConnectionHandler.java:453)
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1471)
at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1334)
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1383)
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at manifold.executor$thread_factory$reify__59583$f__59584.invoke(executor.clj:70)
at clojure.lang.AFn.run(AFn.java:22)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:829)
```

Start in client.clj at the handlers around lines 507, 520, 540, and 582, then inspect stream.clj around line 885. Reproduce the HTTP/2 POST and trace how the Http2Exception reaches the stream; done means the reported ClassCastException no longer occurs and the original error is delivered correctly.

Written by the indexing model from the issue text.