Kotlin 1.7.20-compatible release

[JakeWharton]

Tracking issue.

[JakeWharton]

This isn't blocked idiot. We're JVM-only!

[NorbertSandor]

May I ask when can we expect it?

[NorbertSandor]

Thanks for the release!
(Although I think many of us are unable to upgrade to Kotlin 1.8 because of blocking issues, dependencies still stuck at 1.7.20, etc. In my opinion it is a good thing to support a more stable "x.y.20" Kotlin release as well.)
(edit: It will be much easier to solve versioning issues when Kotlin Multiplatform will support Gradle's "included build" feature. Theoretically it will happen in 1.8.20, it is a long awaited feature :) )

[JakeWharton]

Dependencies using old Kotlin versions should not be a problem unless they depend on experimental APIs or rely on unstable APIs like compiler plugins.

At this time, I don't have the bandwidth or desire to go back and support older Kotlin versions. Going forward I will track the supported versions of the AndroidX Compose compiler more closely, however.

[NorbertSandor]

I have just tried the 0.3.0 release in my (complex multi-module) project using Kotlin 1.7.20 and compilation fails:

java.lang.NoSuchMethodError: 'void org.jetbrains.kotlin.cli.common.messages.MessageCollector.report$default(org.jetbrains.kotlin.cli.common.messages.MessageCollector, org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity, java.lang.String, org.jetbrains.kotlin.cli.common.messages.CompilerMessageSourceLocation, int, java.lang.Object)'
	at androidx.compose.compiler.plugins.kotlin.ComposeComponentRegistrar$Companion.checkCompilerVersion(ComposePlugin.kt:244)
	at androidx.compose.compiler.plugins.kotlin.ComposeComponentRegistrar.registerProjectComponents(ComposePlugin.kt:199)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.registerExtensionsFromPlugins$cli(KotlinCoreEnvironment.kt:656)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$ProjectEnvironment.registerExtensionsFromPlugins(KotlinCoreEnvironment.kt:169)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.configureProjectEnvironment(KotlinCoreEnvironment.kt:566)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.<init>(KotlinCoreEnvironment.kt:199)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.<init>(KotlinCoreEnvironment.kt:108)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.createForProduction(KotlinCoreEnvironment.kt:445)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.createCoreEnvironment(K2JVMCompiler.kt:192)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:143)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:53)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:99)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:47)
	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:475)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:125)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:373)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally$default(IncrementalCompilerRunner.kt:318)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.rebuild(IncrementalCompilerRunner.kt:114)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:207)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:79)
	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:1746)
	at jdk.internal.reflect.GeneratedMethodAccessor107.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)

The Gradle plugin id("org.jetbrains.compose") version "1.3.0-rc04" apply false is on the build classpath, maybe there is some collision between Compose/MP and Mosaic?

[JakeWharton]

Only Kotlin 1.8 is supported by out 0.3.0 release. If you are also using JetBrains Compose then you will have to wait for a 1.8-compatible release.

[NorbertSandor]

A little bit sad but I understand that you don't have enough time - thanks for the info.

Anyway, I tried to downgrade to Kotlin 1.7.20 (and to a compatible Compose Compiler) and it seems trivial (see https://github.com/NorbertSandor/mosaic/tree/kotlin-1.7.20), so maybe I will start using Mosaic with a custom build.