From 77f0bd383448e896ec341239446bd9024cda8230 Mon Sep 17 00:00:00 2001
From: Mikhail Glukhikh <mikhail.glukhikh@jetbrains.com>
Date: Tue, 3 Aug 2021 00:53:46 +0300
Subject: [PATCH] FirOuterClassArgumentsRequiredChecker: read containingClass
 safely

---
 .../declaration/FirOuterClassArgumentsRequiredChecker.kt        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirOuterClassArgumentsRequiredChecker.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirOuterClassArgumentsRequiredChecker.kt
index 5af5f4390eb..dd601d03a31 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirOuterClassArgumentsRequiredChecker.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirOuterClassArgumentsRequiredChecker.kt
@@ -51,7 +51,7 @@ private fun checkOuterClassArgumentsRequired(
             for (index in typeArguments.size until typeParameters.size) {
                 val typeParameter = typeParameters[index]
                 if (!isValidTypeParameterFromOuterClass(typeParameter, declaration, context.session)) {
-                    val outerClass = typeParameter.containingDeclarationSymbol as FirRegularClassSymbol
+                    val outerClass = typeParameter.containingDeclarationSymbol as? FirRegularClassSymbol ?: break
                     reporter.reportOn(typeRef.source, FirErrors.OUTER_CLASS_ARGUMENTS_REQUIRED, outerClass, context)
                     break
                 }