t5553_1.scala:18: error: ambiguous reference to overloaded definition,
both method apply in object Foo1 of type (z: String)Base[T]
and  method apply in object Foo1 of type (a: Int)Base[T]
match expected type ?
  def test1[T] = Foo1[T]
                     ^
t5553_1.scala:19: error: type mismatch;
 found   : [T](z: String)Base[T] <and> (a: Int)Base[T]
 required: Int
  def test2[T]: Int = Foo1[T]
                          ^
t5553_1.scala:20: error: type mismatch;
 found   : [T(in method apply)](z: String)Base[T(in method apply)] <and> (a: Int)Base[T(in method apply)]
 required: Base[T(in method test3)]
  def test3[T]: Base[T] = Foo1[T]
                              ^
t5553_1.scala:24: error: ambiguous reference to overloaded definition,
both method apply in object Foo2 of type (z: String)Base[T]
and  method apply in object Foo2 of type (a: Int)Base[T]
match expected type ?
  def test4[T] = Foo2[T]
                     ^
t5553_1.scala:25: error: type mismatch;
 found   : [T](z: String)Base[T] <and> (a: Int)Base[T]
 required: Int
  def test5[T]: Int = Foo2[T]
                          ^
t5553_1.scala:26: error: type mismatch;
 found   : [T(in method apply)](z: String)Base[T(in method apply)] <and> (a: Int)Base[T(in method apply)]
 required: Base[T(in method test6)]
  def test6[T]: Base[T] = Foo2[T]
                              ^
t5553_1.scala:30: error: ambiguous reference to overloaded definition,
both method apply in object Foo3 of type (z: String)String
and  method apply in object Foo3 of type (a: Int)Base[T]
match expected type ?
  def test7[T] = Foo3[T]
                     ^
t5553_1.scala:31: error: type mismatch;
 found   : [T](z: String)String <and> (a: Int)Base[T]
 required: String
  def test8[T]: String = Foo3[T]
                             ^
t5553_1.scala:32: error: type mismatch;
 found   : [T](z: String)String <and> (a: Int)Base[T]
 required: Int
  def test9[T]: Int = Foo3[T]
                          ^
t5553_1.scala:33: error: type mismatch;
 found   : [T(in method apply)](z: String)String <and> (a: Int)Base[T(in method apply)]
 required: Base[T(in method test10)]
  def test10[T]: Base[T] = Foo3[T]
                               ^
10 errors found