Scala 3.8 REPL support

[eed3si9n]

Steps

ThisBuild / scalaVersion := "3.8.0-RC1-bin-20251101-389483e-NIGHTLY"
resolvers += Resolver.scalaNightlyRepository

Then console.

Problem

sbt:aaa> console
[info] compiling 1 Scala source to /private/tmp/aaa/target/scala-3.8.0-RC1-bin-20251101-389483e-NIGHTLY/classes ...
[error] java.lang.NoClassDefFoundError: dotty/tools/repl/ReplDriver
[error] 	at xsbt.ConsoleInterface.run(ConsoleInterface.java:43)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
[error] 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] 	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
[error] 	at sbt.internal.inc.AnalyzingCompiler.invoke(AnalyzingCompiler.scala:329)
[error] 	at sbt.internal.inc.AnalyzingCompiler.console(AnalyzingCompiler.scala:233)
[error] 	at sbt.Console.console0$1(Console.scala:65)
[error] 	at sbt.Console.$anonfun$apply$5(Console.scala:75)
[error] 	at sbt.Run$.executeSuccess(Run.scala:227)
[error] 	at sbt.Console.$anonfun$apply$4(Console.scala:75)
[error] 	at sbt.internal.util.Terminal.withRawInput(Terminal.scala:146)
[error] 	at sbt.internal.util.Terminal.withRawInput$(Terminal.scala:144)
[error] 	at sbt.internal.util.Terminal$ProxyTerminal$.withRawInput(Terminal.scala:434)
[error] 	at sbt.Console.$anonfun$apply$3(Console.scala:75)
[error] 	at sbt.internal.util.Terminal$TerminalImpl.withRawOutput(Terminal.scala:1038)
[error] 	at sbt.internal.util.Terminal$ProxyTerminal$.withRawOutput(Terminal.scala:473)
[error] 	at sbt.Console.apply(Console.scala:72)
[error] 	at sbt.Console.apply(Console.scala:50)
[error] 	at sbt.Console.apply(Console.scala:42)
[error] 	at sbt.Defaults$.$anonfun$consoleTask$1(Defaults.scala:2353)
[error] 	at sbt.Defaults$.$anonfun$consoleTask$1$adapted(Defaults.scala:2339)
[error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:63)
[error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:69)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:283)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
[error] 	at sbt.Execute.work(Execute.scala:292)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:283)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[error] 	at java.base/java.lang.Thread.run(Thread.java:840)
[error] Caused by: java.lang.ClassNotFoundException: dotty.tools.repl.ReplDriver
[error] 	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:445)
[error] 	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:592)
[error] 	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
[error] 	at xsbt.ConsoleInterface.run(ConsoleInterface.java:43)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
[error] 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] 	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
[error] 	at sbt.internal.inc.AnalyzingCompiler.invoke(AnalyzingCompiler.scala:329)
[error] 	at sbt.internal.inc.AnalyzingCompiler.console(AnalyzingCompiler.scala:233)
[error] 	at sbt.Console.console0$1(Console.scala:65)
[error] 	at sbt.Console.$anonfun$apply$5(Console.scala:75)
[error] 	at sbt.Run$.executeSuccess(Run.scala:227)
[error] 	at sbt.Console.$anonfun$apply$4(Console.scala:75)
[error] 	at sbt.internal.util.Terminal.withRawInput(Terminal.scala:146)
[error] 	at sbt.internal.util.Terminal.withRawInput$(Terminal.scala:144)
[error] 	at sbt.internal.util.Terminal$ProxyTerminal$.withRawInput(Terminal.scala:434)
[error] 	at sbt.Console.$anonfun$apply$3(Console.scala:75)
[error] 	at sbt.internal.util.Terminal$TerminalImpl.withRawOutput(Terminal.scala:1038)
[error] 	at sbt.internal.util.Terminal$ProxyTerminal$.withRawOutput(Terminal.scala:473)
[error] 	at sbt.Console.apply(Console.scala:72)
[error] 	at sbt.Console.apply(Console.scala:50)
[error] 	at sbt.Console.apply(Console.scala:42)
[error] 	at sbt.Defaults$.$anonfun$consoleTask$1(Defaults.scala:2353)
[error] 	at sbt.Defaults$.$anonfun$consoleTask$1$adapted(Defaults.scala:2339)
[error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:63)
[error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:69)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:283)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
[error] 	at sbt.Execute.work(Execute.scala:292)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:283)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[error] 	at java.base/java.lang.Thread.run(Thread.java:840)
[error] (Compile / console) java.lang.NoClassDefFoundError: dotty/tools/repl/ReplDriver