A DESCRIPTION OF THE PROBLEM :
FunctionDescriptorLookupError occurs when compiling sample code that should result in a compile error.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Invoke javac with sample code.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Test.java:9: error: reference to test is ambiguous
    test(list.get(0));
    ^
  both method test(A<?>) in Test and method test(B<?>) in Test match

ACTUAL -
An exception has occurred in the compiler (22.0.1). Please file a bug against the Java compiler via the Java bug reporting page (https://bugreport.java.com) after checking the Bug Database (https://bugs.java.com) for duplicates. Include your program, the following diagnostic, and the parameters passed to the Java compiler in your report. Thank you.
com.sun.tools.javac.code.Types$FunctionDescriptorLookupError


---------- BEGIN SOURCE ----------
import java.util.List;

public class Test {
  public static void main(String[] args) {
    List<X> list = List.of(new X());

    // var x = list.get(0);
    // test(x);
    test(list.get(0));
  }

  static void test(A<?> a) { }
  static void test(B<?> b) { }

  interface A<T extends A<T>> { T a(); }
  interface B<T extends B<T>> /* extends A<T> */ { T b(); }
  static class X implements A<X>, B<X> {
    public X a() { return null; }
    public X b() { return null; }
  }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
(1) split calling code (line 9 to line 7&8)
(2) resolve ambiguous code


FREQUENCY : always