// Indexed aggregate assignment must copy from the source element's storage.
// Sorting uses this three-step swap on slices, so preserving only one word can
// silently duplicate records while both compiler stages still agree.

package aggregate_slice_swap_test;

type row = struct {
	key: i64,
	value: i64,
	guard: i64,
};

@test fn distinct_after_swap() void = {
	let rows: []row = [];
	append(rows, row { key = 1, value = 11, guard = 111 });
	append(rows, row { key = 2, value = 22, guard = 222 });
	let t: row = rows[1];
	rows[1] = rows[0];
	rows[0] = t;
	assert(rows[0].key == 2);
	assert(rows[0].value == 22);
	assert(rows[0].guard == 222);
	assert(rows[1].key == 1);
	assert(rows[1].value == 11);
	assert(rows[1].guard == 111);
};