sign of a complex number throws instead of fails.

[coke]

last test in t/spec/S32-num/sign.t indicates that the sign of a complex number should return an undefined value, but niecza throws an exception:

23:31 <+p6eval> ..niecza v12-30-g567948e: OUTPUT«Unhandled exception: Complex
numbers are not arithmetically ordered; use cmp if you want an
arbitrary order␤ at /home/p6eval/niecza/lib/CORE.setting line
0 (sign @ 0) ␤ at /tmp/Rv3WEKfIaV line 1 (mainline @ 2) ␤ at
/home/p6eval/niecza/lib/CORE.setting l…

Either the test or niecza need to be updated.

[coke]

Note that rakudo's skip comment is:

#?rakudo skip "Test is kind of doubtful IMO -- colomon"