//ww:error "arr[i].field compound on str field"
// Lifted from test/wcc/949_idxfield_compound_run.c reject row "fld_he_str"
// (#33/rule-7): a compound assign on an indexed-element STR field is unwired in
// both stages and MUST loud-fail. The substring is the shared diagnostic body
// — byte-identical on both stages, pinned to "str field" so it cannot also
// match the float/slice/tagged rows (no file:line, no cstage "ww: " prefix —
// both differ cs vs ww).
package main;
type S = struct { f: str, g: i32 };
export fn main() i32 = {
	let xs: [2]S = [S{f="a", g=0}, S{f="b", g=0}];
	xs[0].f += "x";
	return 0;
};