//ww:error "arithmetic on non-numeric type"
// Lifted from test/wcc/948_idx_compound_run.c reject row "he_str_indexed"
// (#133-expanded rule-7): a compound assign on an indexed STR element is
// unwired in both stages and MUST loud-fail. The substring is the FULL shared
// diagnostic body — byte-identical on both stages — pinned to "str element" so
// it cannot also match the float row (no file:line / "ww: " prefix, which
// differ cs vs ww).
package main;
export fn main() i32 = {
	let a: [4]str = ["a", "b", "c", "d"];
	a[0] += "x";
	return 0;
};