From 19a0a1fcd86d6c8450595d051bc7613a9664a763 Mon Sep 17 00:00:00 2001
From: Ilya Chernikov <ilya.chernikov@jetbrains.com>
Date: Wed, 21 Dec 2022 14:08:51 +0100
Subject: [PATCH] K2: add missing MPP warning in LightTree mode

---
 .../kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt  | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt
index 08b080f1ffb..0a5d6784d3e 100644
--- a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt
+++ b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/pipeline/compilerPipeline.kt
@@ -108,6 +108,14 @@ fun compileModulesUsingFrontendIrAndLightTree(
         "ATTENTION!\n This build uses experimental K2 compiler: \n  -Xuse-k2"
     )
 
+    if (compilerConfiguration.languageVersionSettings.supportsFeature(LanguageFeature.MultiPlatformProjects)) {
+        messageCollector.report(
+            CompilerMessageSeverity.ERROR,
+            "K2 compiler does not support multi-platform projects yet, so please remove -Xuse-k2 flag"
+        )
+        return false
+    }
+
     val outputs = mutableListOf<GenerationState>()
     var mainClassFqName: FqName? = null