find lambdas passed into vararg methods

java/java-psi-impl/src/com/intellij/psi/impl/java/stubs/JavaMethodElementType.java

@@ -20,6 +20,7 @@ import com.intellij.lang.LighterAST;
 import com.intellij.lang.LighterASTNode;
 import com.intellij.psi.JavaTokenType;
 import com.intellij.psi.PsiMethod;
+import com.intellij.psi.PsiNameHelper;
 import com.intellij.psi.impl.cache.RecordUtil;
 import com.intellij.psi.impl.cache.TypeInfo;
 import com.intellij.psi.impl.java.stubs.impl.PsiMethodStubImpl;
@@ -169,8 +170,7 @@ public abstract class JavaMethodElementType extends JavaStubElementType<PsiMetho
         for (StubElement paramStub : ((PsiParameterListStub)stubElement).getChildrenStubs()) {
           if (paramStub instanceof PsiParameterStub) {
             TypeInfo type = ((PsiParameterStub)paramStub).getType(false);
-            if (type.arrayCount > 0) continue;
-            String typeName = type.getShortTypeText();
+            String typeName = PsiNameHelper.getShortClassName(type.text);
             if (TypeConversionUtil.isPrimitive(typeName) || TypeConversionUtil.isPrimitiveWrapper(typeName)) continue;
             sink.occurrence(JavaStubIndexKeys.METHOD_TYPES, typeName);
             if (methodTypeParams != null && methodTypeParams.contains(typeName)) {

java/java-psi-impl/src/com/intellij/psi/impl/source/JavaFileElementType.java

@@ -38,7 +38,7 @@ import java.io.IOException;
  * @author max
  */
 public class JavaFileElementType extends ILightStubFileElementType<PsiJavaFileStub> {
-  public static final int STUB_VERSION = 27;
+  public static final int STUB_VERSION = 28;
 
   public JavaFileElementType() {
     super("java.FILE", JavaLanguage.INSTANCE);

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/findUsages/VarargPosition.java

@@ -0,0 +1,6 @@
+public interface <caret>I {
+  void m();
+}
+
+interface J extends I {}
+

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

@@ -57,6 +57,19 @@ public class FindFunctionalInterfaceTest extends LightCodeInsightFixtureTestCase
     doTestOneExpression();
   }
 
+  public void testVarargPosition() throws Exception {
+    myFixture.addClass("\n" +
+                       "class A {  \n" +
+                       "  <T> void foo(T... r) {}\n" +
+                       "  void bar(J i){foo(i, i, () -> {});}\n" +
+                       "}");
+    for (int i = 0; i < JavaFunctionalExpressionSearcher.SMART_SEARCH_THRESHOLD + 1; i++) {
+      myFixture.addClass("class B" + i + " { {Runnable r = () -> {};}}"); //ensure common case is used
+    }
+
+    doTestOneExpression();
+  }
+
   private void doTestOneExpression() {
     myFixture.configureByFile(getTestName(false) + ".java");
     final PsiElement elementAtCaret = myFixture.getElementAtCaret();