From f290cffefcc4da7240e503215a275d1db54de435 Mon Sep 17 00:00:00 2001
From: Tagir Valeev <Tagir.Valeev@jetbrains.com>
Date: Fri, 21 Jul 2017 16:51:26 +0700
Subject: [PATCH] NullnessUtil#getExpressionNullness: support assignment
 expression

---
 .../com/intellij/codeInspection/dataFlow/NullnessUtil.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/NullnessUtil.java b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/NullnessUtil.java
index 1359dd4d8bb1..25c1454415f6 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/NullnessUtil.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/NullnessUtil.java
@@ -148,6 +148,13 @@ public class NullnessUtil {
       PsiElement target = ((PsiReferenceExpression)expression).resolve();
       return DfaPsiUtil.getElementNullability(expression.getType(), (PsiModifierListOwner)target);
     }
+    if (expression instanceof PsiAssignmentExpression) {
+      PsiAssignmentExpression assignment = (PsiAssignmentExpression)expression;
+      if(assignment.getOperationTokenType().equals(JavaTokenType.EQ)) {
+        return getExpressionNullness(assignment.getRExpression());
+      }
+      return Nullness.NOT_NULL;
+    }
     if (expression instanceof PsiMethodCallExpression) {
       PsiMethod method = ((PsiMethodCallExpression)expression).resolveMethod();
       return method != null ? DfaPsiUtil.getElementNullability(expression.getType(), method) : Nullness.UNKNOWN;