However, at this point, den is not zero. For the example provided in the email, den value is 37 and num value is -2

»ñÈ¡Outlook for Android
From: Paul Eggert <eggert@cs.ucla.edu>
Sent: Wednesday, September 10, 2025 2:40:43 AM
To: Adler, Mark <madler@alumni.caltech.edu>
Cc: shi xuantong <sxt1001@outlook.com>; 79414@debbugs.gnu.org <79414@debbugs.gnu.org>
Subject: Re: bug#79414: the ratio output by "gzip -l" is less than 0
 
On 2025-09-09 11:12, Adler, Mark wrote:
> pigz reports "-inf%¡±. Alas, a lower-case ¡°i¡±.

Thanks, good suggestion, I installed the attached into gzip.