// Writes through a module constant are compile errors — for every target
// chain rooted at a const: a struct const's field (this used to compile
// and BUS-ERROR at runtime — issue 0116), an array const's element,
// a compound assignment, and a bare scalar const. A local that shadows
// the const name stays writable (see 0177/0178 for the value semantics).

#import "modules/std.sx";

Color :: struct { r, g, b: i64; }
WHITE :: Color.{ r = 255, g = 255, b = 255 };
K : [4]i64 : .[11, 22, 33, 44];
N : i64 : 4;

main :: () {
    WHITE.r = 0;
    K[0] = 5;
    K[1] += 2;
    N = 9;
}