The tests was unfudged with commit https://github.com/perl6/roast/commit/de3372559d. I'm closing this ticket now.
[perl #124813] Roast rakudo skip/todo test:./S32-num/sign.t line:49 reason: Nom does not yet have a NaN framework in place
Christian Bartolomaeus via RT Fri, 05 Jun 2015 23:36:52 -0700