GNU bug report logs - #68808
subsecond mtime discovery code insufficient

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From: Karl Berry <karl <at> freefriends.org>
To: zack <at> owlfolio.org
Cc: 68808 <at> debbugs.gnu.org
Subject: bug#68808: subsecond mtime discovery code insufficient
Date: Tue, 30 Jan 2024 16:32:04 -0700

(Off-topic for the original bug, but for the sake of public discussion ...)

Hi Zack,

    It is absolutely not *supposed* to be using shell arrays. 

I guess it's not an array. It's the square bracket syntax that confuses
me. A couple of examples from the fn in sanity.m4:

test "$[*]" != "X conftest.ts1 conftest.ts2" ||
..
test "$[]2" = conftest.ts3 &&
..
etc.

I've never seen anything like that before. Searching online, supposedly
$[...] means arithmetic expansion, but clearly that's not what is going
on here. I don't know what it means. Seems like just "$2" (for example)
is intended? I feel like I'm missing/forgetting something basic.

Sorry I didn't read the code when you submitted it originally :(.

Thanks,
Karl

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