[scala 2.6.0-M3] Routes compilation error

[Evan Bennett]

I am trying to migrate my projects to Play 2.6.0-M3. I have followed the migration guide, but when I execute `compile` I am getting the following:

[trace] Stack trace suppressed: run last root/compile:playRoutes for the full output.
[error] (root/compile:playRoutes) java.lang.NoSuchMethodError: play.routes.compiler.inject.twirl.forwardsRouter$._display_(Ljava/lang/Object;Lscala/reflect/ClassTag;)Lplay/twirl/api/Appendable;
[error] Total time: 3 s, completed 28/03/2017 5:25:34 PM
[base-play] $ last root/compile:playRoutes
java.lang.NoSuchMethodError: play.routes.compiler.inject.twirl.forwardsRouter$._display_(Ljava/lang/Object;Lscala/reflect/ClassTag;)Lplay/twirl/api/Appendable;
        at play.routes.compiler.inject.twirl.forwardsRouter$$anonfun$apply$1.apply(forwardsRouter.template.scala:28)
        at play.routes.compiler.inject.twirl.forwardsRouter$$anonfun$apply$1.apply(forwardsRouter.template.scala:28)
        at scala.Option.map(Option.scala:145)
        at play.routes.compiler.inject.twirl.forwardsRouter$.apply(forwardsRouter.template.scala:28)
        at play.routes.compiler.InjectedRoutesGenerator$.generateRouter(RoutesGenerator.scala:211)
        at play.routes.compiler.InjectedRoutesGenerator$.generate(RoutesGenerator.scala:155)
        at play.routes.compiler.RoutesCompiler$$anonfun$compile$1.apply(RoutesCompiler.scala:88)
        at play.routes.compiler.RoutesCompiler$$anonfun$compile$1.apply(RoutesCompiler.scala:87)
        at scala.util.Either$RightProjection.map(Either.scala:536)
        at play.routes.compiler.RoutesCompiler$.compile(RoutesCompiler.scala:87)
        at play.sbt.routes.RoutesCompiler$$anonfun$6$$anonfun$7.apply(RoutesCompiler.scala:146)
        at play.sbt.routes.RoutesCompiler$$anonfun$6$$anonfun$7.apply(RoutesCompiler.scala:145)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
        at scala.collection.immutable.List.foreach(List.scala:318)
        at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
        at scala.collection.AbstractTraversable.map(Traversable.scala:105)
        at play.sbt.routes.RoutesCompiler$$anonfun$6.apply(RoutesCompiler.scala:145)
        at play.sbt.routes.RoutesCompiler$$anonfun$6.apply(RoutesCompiler.scala:143)
        at com.typesafe.sbt.web.incremental.package$.syncIncremental(package.scala:228)
        at play.sbt.routes.RoutesCompiler$.compileRoutes(RoutesCompiler.scala:143)
        at play.sbt.routes.RoutesCompiler$$anonfun$4.apply(RoutesCompiler.scala:137)
        at play.sbt.routes.RoutesCompiler$$anonfun$4.apply(RoutesCompiler.scala:129)
        at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
        at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
        at sbt.std.Transform$$anon$4.work(System.scala:63)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
        at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
        at sbt.Execute.work(Execute.scala:237)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
        at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
        at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
[error] (root/compile:playRoutes) java.lang.NoSuchMethodError: play.routes.compiler.inject.twirl.forwardsRouter$._display_(Ljava/lang/Object;Lscala/reflect/ClassTag;)Lplay/twirl/api/Appendable;

Even when I remove all routes files, I still get the error. I have looked on GitHub to try to find what might be causing this, but I am stumped.

If anyone can advise me what I might do to try to fix this, I would greatly appreciate it.

[Evan Bennett]

Entirely my fault. For some reason I had changed the referenced method in my custom version of twirl.

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  Evan Bennett
  BInfTech(DataCommunications&SoftwareEng)(QUT) MACS