From b81696947cc9d076ef8e88f716f7a3b8b3ec7352 Mon Sep 17 00:00:00 2001
From: Ilya Kirillov <ilya.kirillov@jetbrains.com>
Date: Wed, 13 Mar 2019 14:56:07 +0300
Subject: [PATCH] New J2K: Do not call useless cast on null expression on post
 processing

---
 .../src/org/jetbrains/kotlin/nj2k/NewJ2kPostProcessings.kt       | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nj2k/nj2k-services/src/org/jetbrains/kotlin/nj2k/NewJ2kPostProcessings.kt b/nj2k/nj2k-services/src/org/jetbrains/kotlin/nj2k/NewJ2kPostProcessings.kt
index bbff9014e66..ecab4c82890 100644
--- a/nj2k/nj2k-services/src/org/jetbrains/kotlin/nj2k/NewJ2kPostProcessings.kt
+++ b/nj2k/nj2k-services/src/org/jetbrains/kotlin/nj2k/NewJ2kPostProcessings.kt
@@ -241,6 +241,7 @@ object NewJ2KPostProcessingRegistrar {
             RemoveRedundantExpressionQualifierProcessing(),
 
             registerDiagnosticBasedProcessing<KtBinaryExpressionWithTypeRHS>(Errors.USELESS_CAST) { element, _ ->
+                if (element.left.isNullExpression()) return@registerDiagnosticBasedProcessing
                 val expression = RemoveUselessCastFix.invoke(element)
 
                 val variable = expression.parent as? KtProperty