redundant cast: process branches of conditional expressions with respect to expected type for functional expressions (IDEA-156480)

java/java-psi-api/src/com/intellij/psi/util/RedundantCastUtil.java

@@ -663,6 +663,10 @@ public class RedundantCastUtil {
             return;
           }
         }
+
+        if (operand instanceof PsiFunctionalExpression && !castTo.equals(PsiTypesUtil.getExpectedTypeByParent(parent))) {
+          return;
+        }
       }
 
       if (arrayAccessAtTheLeftSideOfAssignment(parent, typeCast)) {