checker/tests/nullness/generics/GenericsBounds2.java

import org.checkerframework.checker.nullness.qual.*;

/*
 * Illustrate a problem with annotations on type variables.
 */
public class GenericsBounds2<X extends @Nullable Object> {
  void m1(X @NonNull [] a1, @Nullable X @NonNull [] a2) {
    // :: error: (assignment)
    a1 = null;
    // :: error: (assignment)
    a1[0] = null;

    // :: error: (assignment)
    a2 = null;
    a2[0] = null;

    // This error is expected when arrays are invariant.
    // Currently, this error is not raised.
    // TODOINVARR:: error: (assignment)
    a2 = a1;
    a2[0] = null;
  }

  void aaa(@Nullable Object[] p1, @NonNull Object[] p2) {
    // This one is only expected when we switch the default for arrays to be invariant.
    // TODOINVARR:: error: (assignment)
    p1 = p2;
  }
}