Exception in LSP when hovering the beginning or ending curly braces of a `class`, `data class` or `enum`: `java.lang.UnsupportedOperationException: Should not be called`

[stefanpartheym]

Hi,

I'm using kotlin-language-server with neovim and https://github.com/neovim/nvim-lspconfig.

Unfortunately, I always receive this annoying notification from the LSP in neovim, whenever I hover the beginning or ending curly braces of a class, data class or enum:
kotlin_language_server: -32603: Internal error.

I checked the logs, and this exception thrown in the LSP seems to be the source of this notification:

ERROR: Exception while analyzing expression in (1,50) in /dummy.virtual.kt

Attachments:
causeThrowable
java.lang.UnsupportedOperationException: Should not be called
	at org.jetbrains.kotlin.resolve.lazy.NoTopLevelDescriptorProvider.shouldNotBeCalled(TopLevelDescriptorProvider.kt:36)
	at org.jetbrains.kotlin.resolve.lazy.NoTopLevelDescriptorProvider.getPackageFragment(TopLevelDescriptorProvider.kt:39)
	at org.jetbrains.kotlin.resolve.DeclarationResolver.getTopLevelDescriptorsByFqName(DeclarationResolver.kt:107)
	at org.jetbrains.kotlin.resolve.DeclarationResolver.checkRedeclarationsInPackages(DeclarationResolver.kt:86)
	at org.jetbrains.kotlin.resolve.LazyTopDownAnalyzer.analyzeDeclarations(LazyTopDownAnalyzer.kt:216)
	at org.jetbrains.kotlin.types.expressions.LocalClassifierAnalyzer.processClassOrObject(LocalClassifierAnalyzer.kt:121)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorForStatements.visitClass(ExpressionTypingVisitorForStatements.java:172)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorForStatements.visitClass(ExpressionTypingVisitorForStatements.java:73)
	at org.jetbrains.kotlin.psi.KtClass.accept(KtClass.kt:22)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.lambda$getTypeInfo$0(ExpressionTypingVisitorDispatcher.java:176)
	at org.jetbrains.kotlin.util.PerformanceCounter.time(PerformanceCounter.kt:90)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.getTypeInfo(ExpressionTypingVisitorDispatcher.java:165)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.getTypeInfo(ExpressionTypingVisitorDispatcher.java:148)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingServices.getTypeInfo(ExpressionTypingServices.java:121)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingServices.getTypeInfo(ExpressionTypingServices.java:96)
	at org.javacs.kt.compiler.Compiler.compileKtExpression(Compiler.kt:563)
	at org.javacs.kt.CompiledFile.bindingContextOf(CompiledFile.kt:51)
	at org.javacs.kt.CompiledFile.referenceAtPoint(CompiledFile.kt:76)
	at org.javacs.kt.CompiledFile.findDeclarationReference(CompiledFile.kt:193)
	at org.javacs.kt.CompiledFile.findDeclaration(CompiledFile.kt:187)
	at org.javacs.kt.highlight.DocumentHighlightKt.documentHighlightsAt(DocumentHighlight.kt:14)
	at org.javacs.kt.KotlinTextDocumentService$documentHighlight$1.invoke(KotlinTextDocumentService.kt:120)
	at org.javacs.kt.KotlinTextDocumentService$documentHighlight$1.invoke(KotlinTextDocumentService.kt:118)
	at org.javacs.kt.util.AsyncExecutor.compute$lambda$2(AsyncExecutor.kt:19)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)

----
expression.kt
<File name: dummy.virtual.kt, Physical: true>
<ELEMENT>class TestClass(val testValue: String) {

    fun testFunction(input: String): String {
        return "Test output: ${input}"
    }
}</ELEMENT>
org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments: Exception while analyzing expression in (1,50) in /dummy.virtual.kt
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.logOrThrowException(ExpressionTypingVisitorDispatcher.java:253)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.lambda$getTypeInfo$0(ExpressionTypingVisitorDispatcher.java:225)
	at org.jetbrains.kotlin.util.PerformanceCounter.time(PerformanceCounter.kt:90)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.getTypeInfo(ExpressionTypingVisitorDispatcher.java:165)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.getTypeInfo(ExpressionTypingVisitorDispatcher.java:148)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingServices.getTypeInfo(ExpressionTypingServices.java:121)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingServices.getTypeInfo(ExpressionTypingServices.java:96)
	at org.javacs.kt.compiler.Compiler.compileKtExpression(Compiler.kt:563)
	at org.javacs.kt.CompiledFile.bindingContextOf(CompiledFile.kt:51)
	at org.javacs.kt.CompiledFile.referenceAtPoint(CompiledFile.kt:76)
	at org.javacs.kt.CompiledFile.findDeclarationReference(CompiledFile.kt:193)
	at org.javacs.kt.CompiledFile.findDeclaration(CompiledFile.kt:187)
	at org.javacs.kt.highlight.DocumentHighlightKt.documentHighlightsAt(DocumentHighlight.kt:14)
	at org.javacs.kt.KotlinTextDocumentService$documentHighlight$1.invoke(KotlinTextDocumentService.kt:120)
	at org.javacs.kt.KotlinTextDocumentService$documentHighlight$1.invoke(KotlinTextDocumentService.kt:118)
	at org.javacs.kt.util.AsyncExecutor.compute$lambda$2(AsyncExecutor.kt:19)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.UnsupportedOperationException: Should not be called
	at org.jetbrains.kotlin.resolve.lazy.NoTopLevelDescriptorProvider.shouldNotBeCalled(TopLevelDescriptorProvider.kt:36)
	at org.jetbrains.kotlin.resolve.lazy.NoTopLevelDescriptorProvider.getPackageFragment(TopLevelDescriptorProvider.kt:39)
	at org.jetbrains.kotlin.resolve.DeclarationResolver.getTopLevelDescriptorsByFqName(DeclarationResolver.kt:107)
	at org.jetbrains.kotlin.resolve.DeclarationResolver.checkRedeclarationsInPackages(DeclarationResolver.kt:86)
	at org.jetbrains.kotlin.resolve.LazyTopDownAnalyzer.analyzeDeclarations(LazyTopDownAnalyzer.kt:216)
	at org.jetbrains.kotlin.types.expressions.LocalClassifierAnalyzer.processClassOrObject(LocalClassifierAnalyzer.kt:121)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorForStatements.visitClass(ExpressionTypingVisitorForStatements.java:172)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorForStatements.visitClass(ExpressionTypingVisitorForStatements.java:73)
	at org.jetbrains.kotlin.psi.KtClass.accept(KtClass.kt:22)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.lambda$getTypeInfo$0(ExpressionTypingVisitorDispatcher.java:176)
	... 18 more
Okt. 31, 2024 11:38:11 AM org.eclipse.lsp4j.jsonrpc.RemoteEndpoint fallbackResponseError
SCHWERWIEGEND: Internal error: org.javacs.kt.util.KotlinLSException: Error while analyzing: class TestClass(val testValue: String) {

    fun testFunction(input: String): String {
...
}
java.util.concurrent.CompletionException: org.javacs.kt.util.KotlinLSException: Error while analyzing: class TestClass(val testValue: String) {

    fun testFunction(input: String): String {
...
}
	at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315)
	at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1770)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: org.javacs.kt.util.KotlinLSException: Error while analyzing: class TestClass(val testValue: String) {

    fun testFunction(input: String): String {
...
}
	at org.javacs.kt.compiler.Compiler.compileKtExpression(Compiler.kt:574)
	at org.javacs.kt.CompiledFile.bindingContextOf(CompiledFile.kt:51)
	at org.javacs.kt.CompiledFile.referenceAtPoint(CompiledFile.kt:76)
	at org.javacs.kt.CompiledFile.findDeclarationReference(CompiledFile.kt:193)
	at org.javacs.kt.CompiledFile.findDeclaration(CompiledFile.kt:187)
	at org.javacs.kt.highlight.DocumentHighlightKt.documentHighlightsAt(DocumentHighlight.kt:14)
	at org.javacs.kt.KotlinTextDocumentService$documentHighlight$1.invoke(KotlinTextDocumentService.kt:120)
	at org.javacs.kt.KotlinTextDocumentService$documentHighlight$1.invoke(KotlinTextDocumentService.kt:118)
	at org.javacs.kt.util.AsyncExecutor.compute$lambda$2(AsyncExecutor.kt:19)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)
	... 3 more
Caused by: org.jetbrains.kotlin.util.KotlinFrontEndException: Exception while analyzing expression in (1,50) in /dummy.virtual.kt

Attachments:
causeThrowable
java.lang.UnsupportedOperationException: Should not be called
	at org.jetbrains.kotlin.resolve.lazy.NoTopLevelDescriptorProvider.shouldNotBeCalled(TopLevelDescriptorProvider.kt:36)
	at org.jetbrains.kotlin.resolve.lazy.NoTopLevelDescriptorProvider.getPackageFragment(TopLevelDescriptorProvider.kt:39)
	at org.jetbrains.kotlin.resolve.DeclarationResolver.getTopLevelDescriptorsByFqName(DeclarationResolver.kt:107)
	at org.jetbrains.kotlin.resolve.DeclarationResolver.checkRedeclarationsInPackages(DeclarationResolver.kt:86)
	at org.jetbrains.kotlin.resolve.LazyTopDownAnalyzer.analyzeDeclarations(LazyTopDownAnalyzer.kt:216)
	at org.jetbrains.kotlin.types.expressions.LocalClassifierAnalyzer.processClassOrObject(LocalClassifierAnalyzer.kt:121)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorForStatements.visitClass(ExpressionTypingVisitorForStatements.java:172)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorForStatements.visitClass(ExpressionTypingVisitorForStatements.java:73)
	at org.jetbrains.kotlin.psi.KtClass.accept(KtClass.kt:22)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.lambda$getTypeInfo$0(ExpressionTypingVisitorDispatcher.java:176)
	at org.jetbrains.kotlin.util.PerformanceCounter.time(PerformanceCounter.kt:90)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.getTypeInfo(ExpressionTypingVisitorDispatcher.java:165)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.getTypeInfo(ExpressionTypingVisitorDispatcher.java:148)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingServices.getTypeInfo(ExpressionTypingServices.java:121)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingServices.getTypeInfo(ExpressionTypingServices.java:96)
	at org.javacs.kt.compiler.Compiler.compileKtExpression(Compiler.kt:563)
	at org.javacs.kt.CompiledFile.bindingContextOf(CompiledFile.kt:51)
	at org.javacs.kt.CompiledFile.referenceAtPoint(CompiledFile.kt:76)
	at org.javacs.kt.CompiledFile.findDeclarationReference(CompiledFile.kt:193)
	at org.javacs.kt.CompiledFile.findDeclaration(CompiledFile.kt:187)
	at org.javacs.kt.highlight.DocumentHighlightKt.documentHighlightsAt(DocumentHighlight.kt:14)
	at org.javacs.kt.KotlinTextDocumentService$documentHighlight$1.invoke(KotlinTextDocumentService.kt:120)
	at org.javacs.kt.KotlinTextDocumentService$documentHighlight$1.invoke(KotlinTextDocumentService.kt:118)
	at org.javacs.kt.util.AsyncExecutor.compute$lambda$2(AsyncExecutor.kt:19)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)

----
expression.kt
<File name: dummy.virtual.kt, Physical: true>
<ELEMENT>class TestClass(val testValue: String) {

    fun testFunction(input: String): String {
        return "Test output: ${input}"
    }
}</ELEMENT>
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.logOrThrowException(ExpressionTypingVisitorDispatcher.java:261)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.lambda$getTypeInfo$0(ExpressionTypingVisitorDispatcher.java:225)
	at org.jetbrains.kotlin.util.PerformanceCounter.time(PerformanceCounter.kt:90)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.getTypeInfo(ExpressionTypingVisitorDispatcher.java:165)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.getTypeInfo(ExpressionTypingVisitorDispatcher.java:148)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingServices.getTypeInfo(ExpressionTypingServices.java:121)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingServices.getTypeInfo(ExpressionTypingServices.java:96)
	at org.javacs.kt.compiler.Compiler.compileKtExpression(Compiler.kt:563)
	... 12 more
Caused by: java.lang.UnsupportedOperationException: Should not be called
	at org.jetbrains.kotlin.resolve.lazy.NoTopLevelDescriptorProvider.shouldNotBeCalled(TopLevelDescriptorProvider.kt:36)
	at org.jetbrains.kotlin.resolve.lazy.NoTopLevelDescriptorProvider.getPackageFragment(TopLevelDescriptorProvider.kt:39)
	at org.jetbrains.kotlin.resolve.DeclarationResolver.getTopLevelDescriptorsByFqName(DeclarationResolver.kt:107)
	at org.jetbrains.kotlin.resolve.DeclarationResolver.checkRedeclarationsInPackages(DeclarationResolver.kt:86)
	at org.jetbrains.kotlin.resolve.LazyTopDownAnalyzer.analyzeDeclarations(LazyTopDownAnalyzer.kt:216)
	at org.jetbrains.kotlin.types.expressions.LocalClassifierAnalyzer.processClassOrObject(LocalClassifierAnalyzer.kt:121)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorForStatements.visitClass(ExpressionTypingVisitorForStatements.java:172)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorForStatements.visitClass(ExpressionTypingVisitorForStatements.java:73)
	at org.jetbrains.kotlin.psi.KtClass.accept(KtClass.kt:22)
	at org.jetbrains.kotlin.types.expressions.ExpressionTypingVisitorDispatcher.lambda$getTypeInfo$0(ExpressionTypingVisitorDispatcher.java:176)
	... 18 more

Minimal sample code to reproduce:

package org.example

import java.time.LocalDate

class TestClass(val testValue: String) { // LSP throws an exception, when this curly brace is hovered with cursor

    fun testFunction(input: String): String {
        return "Test output: ${input}"
    }
} // LSP throws an exception, when this curly brace is hovered with cursor

fun main() {
    val test = TestClass("test")
    println(test.testFunction("Hello World!"))
}

Is there a way to work around this?
Thanks

I know, this is a duplicate of #599, but I think mine is more detailed.

[stefanpartheym]

Ok, so I'm using the following workaround now to suppress these annoying notifications I get in neovim when the LSP throws an exception:

  {
    "folke/noice.nvim",
    event = "VeryLazy",
    opts = {
      routes = {
        {
          -- Disable annoying error from `kotlin_language_server`.
          opts = { skip = true },
          filter = {
            event = "notify",
            find = "^kotlin_language_server: %-32603: Internal error%.$",
          },
        },
      },
    },
  },

This can be helpful for other people with the same issue/setup too.

Feel free to close this issue, if the exception is too hard to track down and fix. I understand it is tedious to debug something like this with very little documentation on the kotlin compiler internals.

[AlexandrosAlexiou]

This is fixed in this fork.
This repository is not maintained.

[stefanpartheym]

Thank you @AlexandrosAlexiou !
I tried it out by cloning the fork locally and setting it up in nvim-lspconfig. Works great! The annoying internal errors are gone now.

For anyone interested in how to setup the forked repo:

Clone and build the fork:

git clone https://github.com/kotlin-community-tools/kotlin-language-server.git
cd kotlin-language-server
./gradlew :server:installDist

nvim config:

      require("lspconfig").kotlin_language_server.setup({
        cmd = {
          os.getenv("HOME") .. "/.lsp/kotlin-language-server/server/build/install/server/bin/kotlin-language-server",
        },
        capabilities = capabilities,
      })

[fwcd]

Appreciate the efforts on maintaining an active fork, but please keep the issue open if it's not fixed here yet (and use downstream issues otherwise).

[fwcd]

I've cherry-picked kotlin-community-tools/kotlin-language-server@eadceb7 to #612, though this doesn't fix the issue and just prevents it from potentially crashing the language server