buffer: write(String str, int off, int len) doesn't work

[ogrammer]

I was previously using jooby 3.0.7, after updating to 3.1.0 various problems have appeared. I have also tried 3.1.1 before reverting to 3.0.7. There is a problem with the Gson module and the new DataBuffer, that for some things just does not work and for others it produces incorrect JSON serialization. Here is the error for when it does not work at all:

java.lang.IndexOutOfBoundsException: null
        at java.base/java.nio.CharBuffer.wrap(CharBuffer.java:544)
        at io.jooby.buffer.DataBufferWriter.write(DataBufferWriter.java:51)
        at com.google.gson.stream.JsonWriter.string(JsonWriter.java:764)
        at com.google.gson.stream.JsonWriter.value(JsonWriter.java:524)
        at com.google.gson.internal.bind.TypeAdapters$15.write(TypeAdapters.java:476)
        at com.google.gson.internal.bind.TypeAdapters$15.write(TypeAdapters.java:459)
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:73)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$2.write(ReflectiveTypeAdapterFactory.java:247)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:490)
        at com.google.gson.internal.bind.ObjectTypeAdapter.write(ObjectTypeAdapter.java:184)
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:73)
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:99)
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:59)
        at com.google.gson.Gson.toJson(Gson.java:944)
        at com.google.gson.Gson.toJson(Gson.java:899)
        at com.google.gson.Gson.toJson(Gson.java:870)
        at io.jooby.gson.GsonModule.encode(GsonModule.java:115)
        at io.jooby.internal.HttpMessageEncoder.encode(HttpMessageEncoder.java:107)
        at io.jooby.DefaultContext.render(DefaultContext.java:467)
        at io.jooby.internal.handler.DefaultHandler.lambda$apply$e67b40fd$1(DefaultHandler.java:25)
        at io.jooby.Route$Filter.lambda$then$e67b40fd$1(Route.java:91)
        at io.jooby.internal.handler.WorkerHandler.lambda$apply$0(WorkerHandler.java:22)
        at io.jooby.internal.jetty.JettyContext.dispatch(JettyContext.java:344)
        at io.jooby.internal.jetty.JettyContext.dispatch(JettyContext.java:338)
        at io.jooby.internal.handler.WorkerHandler.lambda$apply$e67b40fd$1(WorkerHandler.java:19)
        at io.jooby.Route$Filter.lambda$then$e67b40fd$1(Route.java:91)
        at io.jooby.internal.RouterMatch.execute(RouterMatch.java:92)
        at io.jooby.Router$Match.execute(Router.java:76)
        at io.jooby.internal.jetty.JettyHandler.handle(JettyHandler.java:37)
        at org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:851)
        at org.eclipse.jetty.server.Server.handle(Server.java:179)
        at org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:635)
        at org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:411)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:322)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)
        at org.eclipse.jetty.io.ssl.SslConnection$SslEndPoint.onFillable(SslConnection.java:574)
        at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:390)
        at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:150)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)
        at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:478)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:441)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:293)
        at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:201)
        at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:311)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:979)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1209)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1164)
        at java.base/java.lang.Thread.run(Thread.java:1583)

Maybe the fix for this will fix the issue with incorrect serialization too

No problems: 3.0.7 and 3.0.9

Broken: 3.1.0 and 3.1.1