From 924e032bbff09309a47a4e1e42e170a633fb745e Mon Sep 17 00:00:00 2001
From: "Anna.Kozlova" <anna.kozlova@jetbrains.com>
Date: Tue, 20 Mar 2018 19:55:24 +0100
Subject: [PATCH] lvti: reject initializing var with void (IDEA-188623)

---
 .../codeInsight/daemon/impl/analysis/HighlightUtil.java     | 6 ++++++
 .../daemonCodeAnalyzer/advLVTI/SimpleAvailability.java      | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java b/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java
index 49cdcf3e21ba..7b6af77edc47 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java
@@ -462,6 +462,12 @@ public class HighlightUtil extends HighlightUtilBase {
             .descriptionAndTooltip("Cannot infer type: variable initializer is 'null'")
             .range(typeElement).create();
         }
+
+        if (PsiType.VOID.equals(lType)) {
+          return HighlightInfo.newHighlightInfo(HighlightInfoType.ERROR)
+            .descriptionAndTooltip("Cannot infer type: variable initializer is 'void'")
+            .range(typeElement).create();
+        }
       }
     }
     return null;
diff --git a/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advLVTI/SimpleAvailability.java b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advLVTI/SimpleAvailability.java
index ae255007e6eb..c840246a3986 100644
--- a/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advLVTI/SimpleAvailability.java
+++ b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advLVTI/SimpleAvailability.java
@@ -33,6 +33,8 @@ class Main {
         var runnable = true ? <error descr="Lambda expression not expected here">() -> {}</error> : <error descr="Lambda expression not expected here">() -> {}</error>;
 
         Function<String, String> f1 = (<error descr="Cannot resolve symbol 'var'">var</error> var) -> var;
+
+        <error descr="Cannot infer type: variable initializer is 'void'">var</error> h = localVariableDeclaration();
     }
 
     private void forEachType(String[] strs, Iterable<String> it, Iterable raw) {