bug#37140: 27.0.50; calc gives "Wrong type argument: number-or-marker-p, inf" to many operations

[Eli Zaretskii]

> From: Matt Huszagh <huszaghmatt@gmail.com>
> Date: Thu, 22 Aug 2019 12:07:31 -0700
> Cc: 37140@debbugs.gnu.org
> 
> This appears to be caused by using the -Ofast compiler flag. Using -O3
> removes the issue.

Then this is not a bug.  Don't use -Ofast, it produces programs that
might violate IEEE rules of FP calculations.