It looks like that one gets ignored while compiling, but I'm getting errors for extending an interface with context receivers. It worked fine in the library itself, but not for using it in a different project it seems

// library
fun interface Command {
    context(GunpowderModule, CommandBuilderContext)
    fun build()
}

// elsewhere:
object HelpCommand : Command {
    context(GunpowderModule, CommandBuilderContext)
    override fun build() {
        // ...
    }
}

// my code
object BalanceCommand : Command {
    context(GunpowderModule, CommandBuilderContext)
    override fun build() {
    }
}

org.jetbrains.kotlin.backend.common.BackendException: Backend Internal error: Exception during IR lowering
File being compiled: /home/mart/git/gunpowder-currency/src/main/kotlin/io/github/gunpowder/commands/BalanceCommand.kt
The root cause java.lang.RuntimeException was thrown at: org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.generate(FunctionCodegen.kt:50)
    at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException(CodegenUtil.kt:239)
    at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException$default(CodegenUtil.kt:235)
    at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invokeSequential(performByIrFile.kt:68)
    at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(performByIrFile.kt:55)
    at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(performByIrFile.kt:41)
    at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
    at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:29)
    at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
    at org.jetbrains.kotlin.backend.common.phaser.CompilerPhaseKt.invokeToplevel(CompilerPhase.kt:43)
    at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.invokeCodegen(JvmIrCodegenFactory.kt:284)
    at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.runCodegen(KotlinToJVMBytecodeCompiler.kt:355)
    at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:136)
    at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli$default(KotlinToJVMBytecodeCompiler.kt:60)
    at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:157)
    at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:52)
    at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:94)
    at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:43)
    at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
    at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:477)
    at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:127)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:366)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally$default(IncrementalCompilerRunner.kt:311)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.rebuild(IncrementalCompilerRunner.kt:110)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:200)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:75)
    at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:625)
    at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:101)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1739)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    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$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.RuntimeException: Exception while generating code for:
FUN BRIDGE name:build visibility:public modality:OPEN <> ($this:io.github.gunpowder.commands.BalanceCommand) returnType:kotlin.Unit
  $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:io.github.gunpowder.commands.BalanceCommand
  EXPRESSION_BODY
    CALL 'public open fun build (<this>: io.github.gunpowder.api.GunpowderModule, <this>: io.github.gunpowder.api.builders.CommandBuilderContext): kotlin.Unit declared in io.github.gunpowder.commands.BalanceCommand' type=kotlin.Unit origin=BRIDGE_DELEGATION
      $this: GET_VAR '<this>: io.github.gunpowder.commands.BalanceCommand declared in io.github.gunpowder.commands.BalanceCommand.build' type=io.github.gunpowder.commands.BalanceCommand origin=null

    at org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.generate(FunctionCodegen.kt:50)
    at org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.generate$default(FunctionCodegen.kt:43)
    at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generateMethodNode(ClassCodegen.kt:380)
    at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generateMethod(ClassCodegen.kt:397)
    at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generate(ClassCodegen.kt:148)
    at org.jetbrains.kotlin.backend.jvm.FileCodegen.lower(JvmPhases.kt:44)
    at org.jetbrains.kotlin.backend.common.phaser.FileLoweringPhaseAdapter.invoke(PhaseBuilders.kt:120)
    at org.jetbrains.kotlin.backend.common.phaser.FileLoweringPhaseAdapter.invoke(PhaseBuilders.kt:116)
    at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
    at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invokeSequential(performByIrFile.kt:65)
    ... 42 more
Caused by: java.lang.IllegalArgumentException: No argument for parameter VALUE_PARAMETER name:<this> index:0 type:io.github.gunpowder.api.GunpowderModule:
CALL 'public open fun build (<this>: io.github.gunpowder.api.GunpowderModule, <this>: io.github.gunpowder.api.builders.CommandBuilderContext): kotlin.Unit declared in io.github.gunpowder.commands.BalanceCommand' type=kotlin.Unit origin=BRIDGE_DELEGATION
  $this: GET_VAR '<this>: io.github.gunpowder.commands.BalanceCommand declared in io.github.gunpowder.commands.BalanceCommand.build' type=io.github.gunpowder.commands.BalanceCommand origin=null

    at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitCall$handleValueParameter(ExpressionCodegen.kt:497)
    at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitCall(ExpressionCodegen.kt:504)
    at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitCall(ExpressionCodegen.kt:130)
    at org.jetbrains.kotlin.ir.expressions.IrCall.accept(IrCall.kt:17)
    at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitExpressionBody(ExpressionCodegen.kt:861)
    at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.visitExpressionBody(ExpressionCodegen.kt:130)
    at org.jetbrains.kotlin.ir.expressions.IrExpressionBody.accept(IrExpressionBody.kt:18)
    at org.jetbrains.kotlin.backend.jvm.codegen.ExpressionCodegen.generate(ExpressionCodegen.kt:234)
    at org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.doGenerate(FunctionCodegen.kt:122)
    at org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.generate(FunctionCodegen.kt:48)
    ... 51 more