Creating TypeInfo with class defined in method scope throws GenericSignatureFormatError

Creating a TypeInfo like this:

@Test
fun `type info with class defined in method scope`() {
    class SomeClass
    typeInfo<SomeClass>()
}

Causes a GenericSignatureFormatError with the following stack trace:

java.lang.reflect.GenericSignatureFormatError: Signature Parse error: expected '<' or ';' but got  
	Remaining input:  info with class defined in method scope$SomeClass;>;

	at sun.reflect.generics.parser.SignatureParser.error(SignatureParser.java:124)
	at sun.reflect.generics.parser.SignatureParser.parsePackageNameAndSimpleClassTypeSignature(SignatureParser.java:348)
	at sun.reflect.generics.parser.SignatureParser.parseClassTypeSignature(SignatureParser.java:310)
	at sun.reflect.generics.parser.SignatureParser.parseFieldTypeSignature(SignatureParser.java:289)
	at sun.reflect.generics.parser.SignatureParser.parseFieldTypeSignature(SignatureParser.java:283)
	at sun.reflect.generics.parser.SignatureParser.parseTypeArgument(SignatureParser.java:436)
	at sun.reflect.generics.parser.SignatureParser.parseTypeArguments(SignatureParser.java:396)
	at sun.reflect.generics.parser.SignatureParser.parsePackageNameAndSimpleClassTypeSignature(SignatureParser.java:346)
	at sun.reflect.generics.parser.SignatureParser.parseClassTypeSignature(SignatureParser.java:310)
	at sun.reflect.generics.parser.SignatureParser.parseClassSignature(SignatureParser.java:213)
	at sun.reflect.generics.parser.SignatureParser.parseClassSig(SignatureParser.java:156)
	at sun.reflect.generics.repository.ClassRepository.parse(ClassRepository.java:57)
	at sun.reflect.generics.repository.ClassRepository.parse(ClassRepository.java:41)
	at sun.reflect.generics.repository.AbstractRepository.<init>(AbstractRepository.java:74)
	at sun.reflect.generics.repository.GenericDeclRepository.<init>(GenericDeclRepository.java:49)
	at sun.reflect.generics.repository.ClassRepository.<init>(ClassRepository.java:53)
	at sun.reflect.generics.repository.ClassRepository.make(ClassRepository.java:70)
	at java.lang.Class.getGenericInfo(Class.java:2548)
	at java.lang.Class.getGenericSuperclass(Class.java:765)
	at de.nielsfalk.playground.ktor.swagger.ModelExtractionTest.type info with class defined in method scope(ModelExtractionTest.kt:372)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Kotlin IntelliJ Plugin version: 1.2.50-release-IJ2018.1-1 Same issue exists when running the test through Gradle which is using Kotlin version 1.2.50.

In the typeInfo method it seems to be failing here:

inline fun <reified T> typeInfo(): TypeInfo {
    val base = object : TypeBase<T>() {}
    val superType = base::class.java.genericSuperclass!! // <== This line here.

    val reifiedType = (superType as ParameterizedType).actualTypeArguments.first()!!
    return TypeInfo(T::class, reifiedType)
}

[e5l]

Look’s like an interop issue in the compiler. I’m investigating now.

[e5l]

Please consider avoiding spaces in names with TypeInfo usages.

motivation: https://youtrack.jetbrains.com/issue/KT-25337