[java-inspections] IDEA-374865 ClassCanBeRecord: fix this not being considered a reference to containing class

In response to IJ-CR-167896

GitOrigin-RevId: e1046f37f326ea127d14d27d332001800e46d327

java/java-impl-inspections/src/com/intellij/codeInspection/classCanBeRecord/ConstructorBodyProcessor.java

@@ -252,6 +252,12 @@ final class ConstructorBodyProcessor {
     if (expression == null) return false;
     Ref<Boolean> hasReferenceToClassUnderConstruction = new Ref<>(false);
     expression.accept(new JavaRecursiveElementWalkingVisitor() {
+      @Override
+      public void visitThisExpression(PsiThisExpression expression) {
+        super.visitThisExpression(expression);
+        hasReferenceToClassUnderConstruction.set(true);
+      }
+
       @Override
       public void visitReferenceExpression(PsiReferenceExpression expression) {
         super.visitReferenceExpression(expression);

java/java-tests/testData/inspection/classCanBeRecord/flexibleConstructorBodies/beforeDelegating_6.java

@@ -0,0 +1,15 @@
+// "Convert to record class" "false"
+class Person<caret> {
+    final String name;
+    final int age;
+
+    Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    Person(Person person) {
+        System.out.println(this); // javac error: "cannot reference this before supertype constructor has been called"
+        this(person.name, person.age);
+    }
+}