Dependency loop regressed

[Vexu]

const std = @import("std");

const S = struct {
    a: u32,
    b: Map,

    const Map = std.StringHashMap(*S);
};
test "" {
    _ = S;
}

Broken by 8981221 according to git bisect.

[andrewrk]

Thanks for the bisect

[andrewrk]

the improvement is back in with #4561 without the regression