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Unknown error in kotlin compiler

See original GitHub issue

When using custom ksp-based annotation processor, I encountered this exception:

 > Task :my-module:kspDebugKotlin FAILED
 e: java.lang.IllegalStateException: Should not be called!
     at org.jetbrains.kotlin.types.ErrorUtils$1.getPackage(ErrorUtils.java:94)
     at org.jetbrains.kotlin.descriptors.DescriptorUtilKt.resolveClassByFqName(descriptorUtil.kt:24)
     at org.jetbrains.kotlin.resolve.checkers.ExperimentalUsageChecker$Companion.checkCompilerArguments$checkAnnotation(ExperimentalUsageChecker.kt:340)
     at org.jetbrains.kotlin.resolve.checkers.ExperimentalUsageChecker$Companion.checkCompilerArguments(ExperimentalUsageChecker.kt:363)
     at org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport.analyzeAndReport(AnalyzerWithCompilerReport.kt:114)
     at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.analyze(KotlinToJVMBytecodeCompiler.kt:253)
     at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.repeatAnalysisIfNeeded(KotlinToJVMBytecodeCompiler.kt:223)
     at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:100)
     at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli$default(KotlinToJVMBytecodeCompiler.kt:58)
     at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:170)
     at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:52)
     at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:92)
     at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:44)
     at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:98)
     at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1618)
     ...

It occurred after I updated ksp from 1.5.21-beta07 to 1.6.0-1.0.2. I don’t even know how to approach debugging this issue.