From 1fb33207b8c4ce3e40395f5fb9ce4e642a19bfcf Mon Sep 17 00:00:00 2001
From: Ilya Kirillov <ilya.kirillov@jetbrains.com>
Date: Thu, 31 Dec 2020 13:12:08 +0100
Subject: [PATCH] FIR IDE: add meaningful error message when opening non-source
 file

---
 .../idea/fir/low/level/api/FirIdeResolveStateService.kt       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/FirIdeResolveStateService.kt b/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/FirIdeResolveStateService.kt
index 9ab4158ef0b..8df644d00f9 100644
--- a/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/FirIdeResolveStateService.kt
+++ b/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/FirIdeResolveStateService.kt
@@ -41,7 +41,9 @@ internal class FirIdeResolveStateService(project: Project) {
             moduleInfo: IdeaModuleInfo,
             sessionProviderStorage: FirIdeSessionProviderStorage
         ): FirModuleResolveStateImpl {
-            require(moduleInfo is ModuleSourceInfo)
+            if (moduleInfo !is ModuleSourceInfo) {
+                error("Creating FirModuleResolveState is not yet supported for $moduleInfo")
+            }
             val sessionProvider = sessionProviderStorage.getSessionProvider(moduleInfo)
             val firFileBuilder = sessionProvider.rootModuleSession.firFileBuilder
             return FirModuleResolveStateImpl(