Comment 12 for bug 1808984

stracing that, yields:

[pid 62574] chown(".erlang.cookie", 442314011, 1047536456) = -1 EPERM (Operation not permitted)

which is odd, given that owner is not changed....

whereas on amd64 it has

[pid 14595] chown(".erlang.cookie", -1, -1 <unfinished ...>
[pid 14595] <... chown resumed> ) = 0

From code, -1 is converted from undefined. So it feels as if "undefined" is broken on big endian.