Reported here:
https://mail.openjdk.org/pipermail/compiler-dev/2024-August/027572.html

Consider code like:
```
class C {
    Undefined u1;
    Undefined<UndefinedParam> u2;
}
```

And consider annotation processor like:
```
import java.util.Set;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.util.ElementFilter;

@SupportedAnnotationTypes("*")
public class TestAP extends AbstractProcessor {

    @Override
    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
        for (Element root : roundEnv.getRootElements()) {
            for (VariableElement field : ElementFilter.fieldsIn(root.getEnclosedElements())) {
                System.err.println("" + field.getSimpleName() +
                                   "'s type: " + field.asType() +
                                   ", of kind: " + field.asType().getKind() +
                                   ", with underlying Element:" + processingEnv.getTypeUtils().asElement(field.asType()));
            }
        }
        return false;
    }
    
}
```

Then running it leads to:
```
$ javac -classpath ... -processor TestAP /tmp/C.java
u1's type: Undefined, of kind: ERROR, with underlying Element:Undefined
u2's type: <any>, of kind: ERROR, with underlying Element:<any>
warning: No SupportedSourceVersion annotation found on TestAP, returning RELEASE_6.
warning: Supported source version 'RELEASE_6' from annotation processor 'TestAP' less than -source '21'
/tmp/C.java:2: error: cannot find symbol
    Undefined u1;
    ^
  symbol: class Undefined
  location: class C
/tmp/C.java:3: error: cannot find symbol
    Undefined<UndefinedParam> u2;
    ^
  symbol: class Undefined
  location: class C
/tmp/C.java:3: error: cannot find symbol
    Undefined<UndefinedParam> u2;
              ^
  symbol: class UndefinedParam
  location: class C
3 errors
2 warnings
```

Note that for the simple undefined type, the erroneous type has some potentially interesting information available, but there is no information available for the parameterized type - the type arguments are lost, as is any information related to the parameterized type itself. It would be good if more information about the type could be recovered.