duke@1: T5048776.java:12:10: compiler.warn.override.varargs.missing: (- compiler.misc.varargs.override: foo(java.lang.Object...), A1a, foo(java.lang.Object[]), A1)
duke@1: T5048776.java:20:10: compiler.warn.override.varargs.extra: (- compiler.misc.varargs.override: foo(java.lang.Object[]), A2a, foo(java.lang.Object...), A2)
duke@1: 2 warnings