INTERNAL_ERROR - Fatal Error: Unable to find package java.lang in classpath or bootclasspath

[ValdZX]

plugins {
kotlin("jvm") version "1.3.41"
kotlin("kapt") version "1.3.41"
}

allprojects {
repositories {
...
maven(url = "https://jitpack.io")
}
}

dependencies {
kapt("com.google.auto.service:auto-service:1.0-rc6")
implementation(kotlin("stdlib-jdk8"))
testImplementation("org.junit.jupiter:junit-jupiter-api:5.1.0")
testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.1.0")
testImplementation("com.github.tschuchortdev:kotlin-compile-testing:1.1.2")
testImplementation("io.kotlintest:kotlintest-runner-junit5:3.4.0")
testImplementation(files(Jvm.current().toolsJar))
}

exception: java.lang.IllegalStateException: failed to analyze: com.sun.tools.javac.util.FatalError: Fatal Error: Unable to find package java.lang in classpath or bootclasspath
at org.jetbrains.kotlin.analyzer.AnalysisResult.throwIfError(AnalysisResult.kt:56)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.analyzeAndGenerate(KotlinToJVMBytecodeCompiler.kt:361)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileBunchOfSources(KotlinToJVMBytecodeCompiler.kt:258)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:205)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:57)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.java:96)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.java:52)
at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:93)
at com.tschuchort.compiletesting.KotlinCompilation.stubsAndApt(KotlinCompilation.kt:493)
at com.tschuchort.compiletesting.KotlinCompilation.compile(KotlinCompilation.kt:674)
...

[tschuchortdev]

What options are you calling KotlinCompilation with and what JDK are you using?

It looks to me like there is no JDK on the classpath of the compilation. This can happen if KotlinCompilation.jdkHome = null and KotlinCompilation.inheritClassPath = false. So if you set inheritClassPath = true, hopefully it should work.

[ValdZX]

Truble fixet before defining jdkHome

        val result = KotlinCompilation().apply {
            jdkHome = File("C:\\Program Files\\Java\\jdk1.8.0_211")
            ...
        }.compile()

But why dont used context jdk or JAVA_HOME by default?

[ValdZX]

Mayby set File(System.getProperty("java.home")).parentFile for default jdkHome?

[tschuchortdev]

If inheritClassPath=true is used then there is already a JDK in the classpath. Perhaps it would be better to only initialize it as null if inheritClassPath is actually true, or at least show a warning to prevent people from running into this issue.