// a bug was causing this to complain about leaked memory on exit use std; import std::option; import std::option::some; import std::option::none; tag t { foo(int, uint); bar(int, option::t[int]); } fn nested(t o) { alt (o) { case (bar(?i, some[int](_))) { log_err "wrong pattern matched"; fail; } case (_) { log_err "succeeded"; } } } fn main() { nested (bar (1, none[int])); }