// Failable `or` chain propagation (ERR step E2.4b). When every operand of a
// `try …  or try …` chain fails and there is no value terminator, the final
// failure propagates to the enclosing function — here `main`, so the E4.2
// entry-point wrapper prints the unhandled-error header + return trace to
// stderr and exits 1. Each failed attempt contributes its `raise` frame plus
// the chain-attempt frame, so three all-failing attempts leave six frames
// (locations are placeholders until DWARF / E3.0). Expected exit code: 1.

#import "modules/std.sx";

E :: error { A };

fa :: (n: i32) -> (i32, !E) {
    if n == 0 { raise error.A; }
    return n;
}

main :: () -> (i32, !E) {
    v := try fa(0) or try fa(0) or try fa(0);   // all fail → propagate to main
    return v;
}