// A `Vector` lane count that folds to a valid compile-time integer but exceeds a
// `u32` (`Vector(5_000_000_000, f32)`) is a hard error — a clean sx diagnostic
// with a non-zero exit, NOT a compiler panic.
//
// Regression (issue 0087 / F0.4 attempt 6): the lane folded to a valid i64 (5e9)
// and was then narrowed with an unchecked `@intCast` to u32, aborting the
// COMPILER with "integer does not fit in destination type". The lane now narrows
// through the single range-checked `program_index.foldDimU32`, which reports an
// out-of-u32-range lane as this diagnostic and halts the build.
#import "modules/std.sx";

main :: () {
    v : Vector(5000000000, f32) = ---;
    print("unreachable: {}\n", v.x);
}