latest nigtly broke compilation on JVM-14

[rssh]

Minimized code

JAVA - JDK 14, macos. Any code. (sbt in dotty - ok)

Output

[error] scala.MatchError: ClassInfo(ThisType(TypeRef(NoPrefix,module class lang)), class Enum, List(TypeRef(ThisType(TypeRef(NoPrefix,module class lang)),class Object), TypeRef(ThisType(TypeRef(NoPrefix,module class constant)),trait Constable), AppliedType(TypeRef(ThisType(TypeRef(NoPrefix,module class lang)),trait Comparable),List(TypeRef(ThisType(TypeRef(ThisType(TypeRef(NoPrefix,module class lang)),class Enum)),type E))), TypeRef(ThisType(TypeRef(NoPrefix,module class io)),trait Serializable))) (of class dotty.tools.dotc.core.Types$CachedClassInfo)
[error] dotty.tools.dotc.core.Definitions.JavaEnumClass(Definitions.scala:723)
[error] dotty.tools.dotc.core.Definitions.init(Definitions.scala:1666)
[error] dotty.tools.dotc.core.Contexts$ContextBase.initialize(Contexts.scala:830)
[error] dotty.tools.dotc.core.Contexts$Context.initialize(Contexts.scala:542)
[error] dotty.tools.dotc.Run.rootContext(Run.scala:67)
[error] dotty.tools.dotc.Run.<init>(Run.scala:85)
[error] dotty.tools.dotc.Compiler.newRun(Compiler.scala:153)
[error] dotty.tools.dotc.Driver.doCompile(Driver.scala:37)
[error] dotty.tools.dotc.Driver.process(Driver.scala:194)
[error] dotty.tools.dotc.Main.process(Main.scala)
[error] xsbt.CachedCompilerImpl.run(CachedCompilerImpl.java:69)
[error] xsbt.CompilerInterface.run(CompilerInterface.java:41)
[error] java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[error] java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] java.base/java.lang.reflect.Method.invoke(Method.java:564)
[error] sbt.internal.inc.AnalyzingCompiler.call(AnalyzingCompiler.scala:248)
[error] sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:122)
[error] sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:95)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$4(MixedAnalyzingCompiler.scala:91)
[error] scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
[error] sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:186)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$3(MixedAnalyzingCompiler.scala:82)
[error] sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$3$adapted(MixedAnalyzingCompiler.scala:77)
[error] sbt.internal.inc.JarUtils$.withPreviousJar(JarUtils.scala:215)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:77)
[error] sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:146)

Expectation

the compilation will be successful. Note, that with JDK8 - all works.

[bishabosha]

confirmed that 3.0.0-M2-bin-20201030-300e9a2-NIGHTLY is broken but 3.0.0-M1-bin-20201029-1f433d5-NIGHTLY is ok