Issue with brand new Scala 2.13

I’ve update my benchmark project to compare the new LazyList vs the old Stream, here: https://github.com/ilaborie/refactorLoops/tree/master/samples-scala

But I cannot compile the scala part :

[INFO] --- scala-maven-plugin:4.0.2:compile (default) @ samples-scala ---
[WARNING] Scala library detected 2.13.0 doesn't match scala.compat.version : 2.12.-1
[WARNING]  Expected all dependencies to require Scala version: 2.12.-1
[WARNING]  io.github.ilaborie:samples-scala:1.0-SNAPSHOT requires scala version: 2.13.0
[WARNING] Multiple versions of scala libraries detected!
[INFO] Using incremental compilation using Mixed compile order
[INFO] Compiling 2 Scala sources to /Users/igorlaborie/Documents/Workspaces/playground/refactorLoops/samples-scala/target/classes ...
[ERROR] ## Exception when compiling 2 sources to /Users/igorlaborie/Documents/Workspaces/playground/refactorLoops/samples-scala/target/classes
scala/collection/GenTraversableOnce
xsbt.CompilerInterface.newCompiler(CompilerInterface.scala:22)
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.base/java.lang.reflect.Method.invoke(Method.java:566)
sbt.internal.inc.AnalyzingCompiler.call(AnalyzingCompiler.scala:237)
sbt.internal.inc.AnalyzingCompiler.newCachedCompiler(AnalyzingCompiler.scala:134)
sbt.internal.inc.AnalyzingCompiler.newCachedCompiler(AnalyzingCompiler.scala:121)
sbt.internal.inc.FreshCompilerCache.apply(CompilerCache.scala:78)
sbt.internal.inc.AnalyzingCompiler.compile(AnalyzingCompiler.scala:88)
sbt.internal.inc.MixedAnalyzingCompiler.$anonfun$compile$3(MixedAnalyzingCompiler.scala:82)
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
sbt.internal.inc.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:133)
sbt.internal.inc.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:73)
sbt.internal.inc.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:116)
sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1(IncrementalCompilerImpl.scala:307)
sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileInternal$1$adapted(IncrementalCompilerImpl.scala:307)
sbt.internal.inc.Incremental$.doCompile(Incremental.scala:106)
sbt.internal.inc.Incremental$.$anonfun$compile$4(Incremental.scala:87)
sbt.internal.inc.IncrementalCommon.recompileClasses(IncrementalCommon.scala:116)
sbt.internal.inc.IncrementalCommon.cycle(IncrementalCommon.scala:63)
sbt.internal.inc.Incremental$.$anonfun$compile$3(Incremental.scala:89)
sbt.internal.inc.Incremental$.manageClassfiles(Incremental.scala:134)
sbt.internal.inc.Incremental$.compile(Incremental.scala:80)
sbt.internal.inc.IncrementalCompile$.apply(Compile.scala:67)
sbt.internal.inc.IncrementalCompilerImpl.compileInternal(IncrementalCompilerImpl.scala:311)
sbt.internal.inc.IncrementalCompilerImpl.$anonfun$compileIncrementally$1(IncrementalCompilerImpl.scala:269)
sbt.internal.inc.IncrementalCompilerImpl.handleCompilationError(IncrementalCompilerImpl.scala:159)
sbt.internal.inc.IncrementalCompilerImpl.compileIncrementally(IncrementalCompilerImpl.scala:238)
sbt.internal.inc.IncrementalCompilerImpl.compile(IncrementalCompilerImpl.scala:69)
sbt_inc.SbtIncrementalCompiler.compile(SbtIncrementalCompiler.java:127)
scala_maven.ScalaCompilerSupport.incrementalCompile(ScalaCompilerSupport.java:284)
scala_maven.ScalaCompilerSupport.compile(ScalaCompilerSupport.java:101)
scala_maven.ScalaCompilerSupport.doExecute(ScalaCompilerSupport.java:83)
scala_maven.ScalaMojoSupport.execute(ScalaMojoSupport.java:555)
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
org.apache.maven.cli.MavenCli.main(MavenCli.java:192)
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.base/java.lang.reflect.Method.invoke(Method.java:566)
org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)

[davidB]

As a workaround, I suggest you:

• to set scala.compat.version to 2.13 or to remove it (as you don’t use it)
• to not use the incremental mode (default since scala-maven-plugin 4) <recompileMode>all<recompileMode>

[slandelle]

Thanks @eed3si9n , upgrading to 1.3.0-M7 indeed fixed the problem.