unchecked generics array creation for method references

(cherry picked from commit 742ea955d1a88c4ac8cb7727a9221bdf65038c11)

java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/JavaGenericsUtil.java

@@ -88,6 +88,9 @@ public class JavaGenericsUtil {
             psiMethod.getParameterList().getParameters()[parametersCount - 1];
           final PsiType componentType = ((PsiEllipsisType)varargParameter.getType()).getComponentType();
           if (!isReifiableType(resolveResult.getSubstitutor().substitute(componentType))) {
+
+            if (expression instanceof PsiMethodReferenceExpression) return true;
+
             final PsiElement parent = expression.getParent();
             if (parent instanceof PsiCall) {
               final PsiExpressionList argumentList = ((PsiCall)parent).getArgumentList();

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/newMethodRef/GenericArrayCreation.java

@@ -0,0 +1,19 @@
+import java.util.List;
+
+class Test {
+
+    interface I {
+        Test m(List<Integer> l1, List<Integer> l2);
+    }
+
+    static Test meth(List<Integer>... <warning descr="Parameter 'lli' is never used">lli</warning>) {
+        return null;
+    }
+
+    Test(List<Integer>... <warning descr="Parameter 'lli' is never used">lli</warning>) {}
+
+    {
+        I <warning descr="Variable 'i1' is never used">i1</warning> = <warning descr="Unchecked generics array creation for varargs parameter">Test::meth</warning>;
+        I <warning descr="Variable 'i2' is never used">i2</warning> = <warning descr="Unchecked generics array creation for varargs parameter">Test::new</warning>;
+    }
+}

java/java-tests/testSrc/com/intellij/codeInsight/daemon/lambda/NewMethodRefHighlightingTest.java

@@ -17,6 +17,7 @@ package com.intellij.codeInsight.daemon.lambda;
 
 import com.intellij.codeInsight.daemon.LightDaemonAnalyzerTestCase;
 import com.intellij.codeInspection.LocalInspectionTool;
+import com.intellij.codeInspection.uncheckedWarnings.UncheckedWarningLocalInspection;
 import com.intellij.codeInspection.unusedSymbol.UnusedSymbolLocalInspection;
 import com.intellij.openapi.projectRoots.JavaSdkVersion;
 import com.intellij.testFramework.IdeaTestUtil;
@@ -31,6 +32,7 @@ public class NewMethodRefHighlightingTest extends LightDaemonAnalyzerTestCase {
   protected LocalInspectionTool[] configureLocalInspectionTools() {
     return new LocalInspectionTool[]{
       new UnusedSymbolLocalInspection(),
+      new UncheckedWarningLocalInspection()
     };
   }
 
@@ -82,6 +84,10 @@ public class NewMethodRefHighlightingTest extends LightDaemonAnalyzerTestCase {
     doTest(false);
   }
 
+  public void testGenericArrayCreation() throws Exception {
+    doTest(true);
+  }
+
   private void doTest() {
     doTest(false);
   }