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/** Test that call-by-name parameters are set to null if
* they are used only to initialize a lazy value, after the
* value has been initialized.
*/
class Foo(param1: => Object, param2: => String) {
lazy val field1 = param1
lazy val field2 = try param2 finally println("")
}
object Test extends App {
val foo = new Foo(new Object, "abc")
foo.field1
foo.field2
for (f <- foo.getClass.getDeclaredFields) {
f.setAccessible(true)
if (f.getName.startsWith("param")) {
println("%s: %s".format(f.getName, f.get(foo)))
}
}
// test that try-finally does not generated a liftedTry
// helper. This would already fail the first part of the test,
// but this check will help diagnose it (if the single access to a
// private field does not happen directly in the lazy val, it won't
// be nulled).
for (f <- foo.getClass.getDeclaredMethods) {
f.setAccessible(true)
if (f.getName.startsWith("lifted")) {
println("not expected: %s".format(f))
}
}
}
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