java: redundant cast: don't check casts against non-denotable types

GitOrigin-RevId: ba1ac48a92057ae13f2694a6667e576ca1328134

java/java-analysis-impl/src/com/intellij/psi/util/RedundantCastUtil.java

@@ -624,7 +624,7 @@ public class RedundantCastUtil {
       Encoder encoder = new Encoder();
       PsiElement encoded = null;
       try {
-        if (typeByParent != null) {
+        if (typeByParent != null && PsiTypesUtil.isDenotableType(typeByParent, expression)) {
           encoder.encode(encoded = expression);
           return  (PsiCall)LambdaUtil.copyWithExpectedType(expression, typeByParent);
         }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/redundantCast/NonDenotableParent.java

@@ -0,0 +1,12 @@
+class MyTest {
+  void m(String[] refInfos){
+    refInfos = <error descr="Cannot resolve method 'unresolved' in 'MyTest'">unresolved</error>(refInfos, refInfo -> {
+      refInfo = refInfo.<error descr="Cannot resolve method 'replaceAll(java.lang.String, java.lang.String)'">replaceAll</error>("a", "b");
+      refInfo = n<error descr="'n(java.lang.String)' in 'MyTest' cannot be applied to '(<lambda parameter>)'">(refInfo)</error>;
+      return refInfo;
+    });
+  }
+  private static String n(String refInfo) {
+    return refInfo;
+  }
+}

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

@@ -99,6 +99,7 @@ public class LambdaRedundantCastTest extends LightDaemonAnalyzerTestCase {
   public void testSuperBoundLambda() { doTest(); }
   public void testLambdaReturnChain() { doTest(); }
   public void testExpectedTypeProducesBadReturnType() { doTest(); }
+  public void testNonDenotableParent() { doTest(); }
 
   private void doTest() {
     doTest(BASE_PATH + "/" + getTestName(false) + ".java", true, false);