wildcards in receiver type supported (IDEA-92699)

java/java-psi-api/src/com/intellij/psi/LambdaUtil.java

@@ -637,7 +637,7 @@ public class LambdaUtil {
   }
 
   public static boolean isReceiverType(PsiType receiverType, PsiClass containingClass, PsiSubstitutor psiSubstitutor) {
-    final PsiClassType.ClassResolveResult resolveResult = PsiUtil.resolveGenericsClassInType(receiverType);
+    final PsiClassType.ClassResolveResult resolveResult = PsiUtil.resolveGenericsClassInType(GenericsUtil.eliminateWildcards(receiverType));
     final PsiClass receiverClass = resolveResult.getElement();
     if (receiverClass != null && isReceiverType(receiverClass, containingClass)) {
       return resolveResult.getSubstitutor().equals(psiSubstitutor) ||

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/methodRef/Wildcards.java

@@ -0,0 +1,20 @@
+import java.util.*;
+
+class MyTest2{
+    {
+        Comparator<? super String> comparator = String::compareToIgnoreCase;
+    }
+}
+
+class Test {
+    void test() {
+       Foo2<? extends Bar2> foo2 = Bar2::xxx;
+    }
+}
+
+interface Foo2<T> {
+    void bar(T i, T j);
+}
+interface Bar2 {
+    public void xxx(Bar2 p) default {}
+}

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

@@ -109,6 +109,10 @@ public class MethodRefHighlightingTest extends LightDaemonAnalyzerTestCase {
     doTest();
   }
 
+  public void testWildcards() throws Exception {
+    doTest();
+  }
+
   public void testInferenceFromReturnType() throws Exception {
     doTest(true);
   }