//ww:run-exit 5
package main;
type bag = struct { buf: []u8, x: i32 };
fn setlen(b: *bag, n: i32) void = { b.buf.len = n; };
fn main() i32 = { let b: bag; let nope: []u8; b.buf = nope; b.x = 0; setlen(&b, 5); return b.buf.len: i32; };