Fails to build native image for Scala 3 application which uses kind-projector

[arixmkii]

Describe the issue
Native image fails for Scala 3 application with kind-projector plugin enabled due to being unable to locate needed reflective data. The problem doesn't persist for Scala 2 applications. Example project

Steps to reproduce the issue
Please include both build steps as well as run steps

1. git clone --depth 1 https://github.com/arixmkii/native-image-issue-scala3.git
2. Install JVM (any modern 11, 17, 18 or GraalVM will do, build will download graalvm and tools)
3. Install SBT build tool (standalone, via brew or sdkman, any way for your platform)
4. execute at checkout root sbt "++3.1.2; nativeImage"

Describe GraalVM and your environment:

• GraalVM version 22.1.0 for Apple Silicon on macOS
• JDK major version: 17
• OS: macOS Monterey
• Architecture: aarch64 (Apple Silicon)

More details
--verbose flag added to build didn't give any useful additional output around exception.

Native image command line is handled by sbt plugin

The problem doesn't reproduce for Scala 2 build, which could be performed with sbt "++2.13.8; nativeImage"

Reported error for Scala 3.

Fatal error: java.lang.TypeNotPresentException: Type io.github.arixmkii.MyTypes$WrappedFImpl.T not present
  | => fat java.base/sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:117)
	at java.base/sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:125)
	at java.base/sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
	at java.base/sun.reflect.generics.visitor.Reifier.reifyTypeArguments(Reifier.java:68)
	at java.base/sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:138)
	at java.base/sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
	at java.base/sun.reflect.generics.repository.MethodRepository.computeReturnType(MethodRepository.java:75)
	at java.base/sun.reflect.generics.repository.MethodRepository.getReturnType(MethodRepository.java:66)
	at java.base/java.lang.reflect.Method.getGenericReturnType(Method.java:295)
	at com.oracle.svm.reflect.hosted.ReflectionDataBuilder.registerTypesForMethod(ReflectionDataBuilder.java:483)
	at com.oracle.svm.reflect.hosted.ReflectionDataBuilder.processMethodMetadata(ReflectionDataBuilder.java:284)
	at com.oracle.svm.reflect.hosted.ReflectionDataBuilder.duringAnalysis(ReflectionDataBuilder.java:185)
	at com.oracle.svm.reflect.hosted.ReflectionFeature.duringAnalysis(ReflectionFeature.java:189)
	at com.oracle.svm.hosted.NativeImageGenerator.lambda$runPointsToAnalysis$10(NativeImageGenerator.java:726)
	at com.oracle.svm.hosted.FeatureHandler.forEachFeature(FeatureHandler.java:74)
	at com.oracle.svm.hosted.NativeImageGenerator.lambda$runPointsToAnalysis$11(NativeImageGenerator.java:726)
	at com.oracle.graal.pointsto.PointsToAnalysis.runAnalysis(PointsToAnalysis.java:751)
	at com.oracle.svm.hosted.NativeImageGenerator.runPointsToAnalysis(NativeImageGenerator.java:723)
	at com.oracle.svm.hosted.NativeImageGenerator.doRun(NativeImageGenerator.java:558)
	at com.oracle.svm.hosted.NativeImageGenerator.run(NativeImageGenerator.java:515)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner.buildImage(NativeImageGeneratorRunner.java:407)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner.build(NativeImageGeneratorRunner.java:585)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner.main(NativeImageGeneratorRunner.java:128)
	at com.oracle.svm.hosted.NativeImageGeneratorRunner$JDK9Plus.main(NativeImageGeneratorRunner.java:615)
Caused by: java.lang.ClassNotFoundException: io.github.arixmkii.MyTypes$WrappedFImpl.T
	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:445)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:587)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:467)
	at java.base/sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:114)
	... 23 more

[arixmkii]

Changing main method to

  def main(args: Array[String]): Unit = {
    Try(method[WrappedF[Id, *], Unit]).getOrElse(println("Ooops"))
  }

Then running with native image agent generated empty reflect-config.json.

[arixmkii]

Could be that it is a Scala 3 compiler issue scala/scala3#15091 (comment)

[vjovanov]

I believe this is due to the filter in the agent:
https://github.com/oracle/graal/blob/master/substratevm/src/com.oracle.svm.configure/src/com/oracle/svm/configure/trace/AccessAdvisor.java#L93

I believe we should not filter sun.reflect.generics.factory in the agent.

[arixmkii]

This specific one seems to be fixed in Scala 3.2.0 nightlies. The demo project builds successfully with scala 3.2.0-RC1-bin-20220523-6783853-NIGHTLY

Might be worth to keep this open until 3.2.0 stable release for visibility for others encountering the same issue.

[vjovanov]

Marking as closed as Scala 3.2 is out.