// A pure-failable function (`-> !`) that succeeds by IMPLICIT fall-through —
// no explicit `return;` — must initialize its error-channel slot to 0 ("no
// error"), exactly like an explicit `return;` would. Otherwise the slot is
// left undefined and a caller's `catch` (or `main`) reads a garbage tag and
// reports a phantom unhandled error.
//
// This exercises:
//   - a `-> !` callee that falls off the end (no `return;`) — its `catch`
//     handler must NOT fire;
//   - a `main :: () -> !` that falls off the end — must exit 0.
//
// Regression (issue 0190).

#import "modules/std.sx";

noop :: () -> ! { }                 // success by fall-through, no `return;`

main :: () -> ! {
    noop() catch (e) { print("phantom: {}\n", e); };   // must NOT fire
    print("ok\n");                                     // main falls through → exit 0
}