From 67d6396df2db4c8647d8bbbddad29a8743639f77 Mon Sep 17 00:00:00 2001
From: anna <Anna.Kozlova@jetbrains.com>
Date: Thu, 27 Sep 2012 15:49:45 +0200
Subject: [PATCH] method refs: mark method as registered in RefCountHolder

---
 .../daemon/impl/analysis/HighlightVisitorImpl.java   | 10 ++++++++++
 .../UsedMethodsByMethodReferences.java               | 12 ++++++++++++
 .../daemon/LightAdvHighlightingJdk7Test.java         |  1 +
 3 files changed, 23 insertions(+)
 create mode 100644 java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting7/UsedMethodsByMethodReferences.java

diff --git a/java/java-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightVisitorImpl.java b/java/java-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightVisitorImpl.java
index 8efd04e45da3..51c47095e176 100644
--- a/java/java-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightVisitorImpl.java
+++ b/java/java-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightVisitorImpl.java
@@ -967,6 +967,16 @@ public class HighlightVisitorImpl extends JavaElementVisitor implements Highligh
   @Override
   public void visitMethodReferenceExpression(PsiMethodReferenceExpression expression) {
     myHolder.add(HighlightUtil.checkMethodReferencesFeature(expression));
+    JavaResolveResult result;
+    try {
+      result = expression.advancedResolve(true);
+    }
+    catch (IndexNotReadyException e) {
+      return;
+    }
+    if (myRefCountHolder != null) {
+      myRefCountHolder.registerReference(expression, result);
+    }
   }
 
   @Override
diff --git a/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting7/UsedMethodsByMethodReferences.java b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting7/UsedMethodsByMethodReferences.java
new file mode 100644
index 000000000000..c5d09000aa15
--- /dev/null
+++ b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting7/UsedMethodsByMethodReferences.java
@@ -0,0 +1,12 @@
+class C {
+  interface Simplest {
+    void m();
+  }
+  private static void simplest1() { }
+  private static void <warning descr="Private method 'simplest()' is never used">simplest</warning>() { }
+
+  public static void main(String[] args) {
+    Simplest o = C::simplest1;
+    System.out.println(o);
+  }
+}
\ No newline at end of file
diff --git a/java/java-tests/testSrc/com/intellij/codeInsight/daemon/LightAdvHighlightingJdk7Test.java b/java/java-tests/testSrc/com/intellij/codeInsight/daemon/LightAdvHighlightingJdk7Test.java
index 86db9c6b7121..ae05e2cb85f5 100644
--- a/java/java-tests/testSrc/com/intellij/codeInsight/daemon/LightAdvHighlightingJdk7Test.java
+++ b/java/java-tests/testSrc/com/intellij/codeInsight/daemon/LightAdvHighlightingJdk7Test.java
@@ -160,5 +160,6 @@ public class LightAdvHighlightingJdk7Test extends LightDaemonAnalyzerTestCase {
   public void testClassLiteral() throws Exception { doTest(false, false); }
   public void testExtensionMethods() throws Exception { doTest(false, false); }
   public void testMethodReferences() throws Exception { doTest(false, true, false); }
+  public void testUsedMethodsByMethodReferences() throws Exception { doTest(true, true, false); }
   public void testLambdaExpressions() throws Exception { doTest(false, true, false); }
 }