Subject: Re: [bug#30603] Upgrade Racket to 6.12

From: Danny Milosavljevic <[email-masked]>
Date: Mon, 26 Feb 2018 05:16:21 +0100

Hmmm... doesn't that break the GC?

I would just remove MZ_IS_NEG_ZERO in the first place.  There's a fallback in the caller...

Or use a newer gcc so MZ_IS_NEG_ZERO expands to a builtin.