zig/test/cases/bugs/1277.zig

const std = @import("std");

const S = struct.{
    f: ?fn () i32,
};

const s = S.{ .f = f };

fn f() i32 {
    return 1234;
}

test "don't emit an LLVM global for a const function when it's in an optional in a struct" {
    std.debug.assertOrPanic(s.f.?() == 1234);
}