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kotlinlang

Trying to compile this code, with KMP js target and `useEsModules()`, throws an internal compiler error.
Kotlin version 1.9.20
```@JsExport
fun test() {
   sayHello("")
}

@JsModule("hello")
external fun sayHello(name: String)```

```    js {
        browser()
        binaries.library()
        generateTypeScriptDefinitions()
        useEsModules()
    }```

```compileDevelopmentLibraryKotlinJs FAILED
e: java.lang.NullPointerException
	at org.jetbrains.kotlin.ir.backend.js.utils.serialization.JsIrAstSerializer.append(JsIrAstSerializer.kt:99)
	at org.jetbrains.kotlin.ir.backend.js.utils.serialization.JsIrAstSerializer.appendAll(JsIrAstSerializer.kt:94)
	at org.jetbrains.kotlin.ir.backend.js.utils.serialization.JsIrAstSerializerKt.serializeTo(JsIrAstSerializer.kt:19)
	at org.jetbrains.kotlin.ir.backend.js.ic.SourceFileCacheArtifact.commitBinaryAst(IncrementalCacheArtifact.kt:21)
	at org.jetbrains.kotlin.ir.backend.js.ic.IncrementalCacheArtifact.buildModuleArtifactAndCommitCache(IncrementalCacheArtifact.kt:67)
	at org.jetbrains.kotlin.ir.backend.js.ic.CacheUpdater.commitCacheAndBuildModuleArtifacts(CacheUpdater.kt:622)
	at org.jetbrains.kotlin.ir.backend.js.ic.CacheUpdater.actualizeCaches(CacheUpdater.kt:772)
	at org.jetbrains.kotlin.cli.js.K2JsIrCompiler.prepareIcCaches(K2JsIrCompiler.kt:616)
	at org.jetbrains.kotlin.cli.js.K2JsIrCompiler.doExecute(K2JsIrCompiler.kt:253)
	at org.jetbrains.kotlin.cli.js.K2JSCompiler.doExecute(K2JSCompiler.java:181)
	at org.jetbrains.kotlin.cli.js.K2JSCompiler.doExecute(K2JSCompiler.java:72)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:104)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:48)
	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1523)
	at jdk.internal.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:360)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
	at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
	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:833)


FAILURE: Build failed with an exception.```

Hey, it should be fixed pretty soon in 1.9.21.