GNU bug report logs - #57129
29.0.50; Improve behavior of conditionals in Eshell

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Message #110 received at 57129 <at> debbugs.gnu.org (full text, mbox):

From: Bruno Haible <bruno <at> clisp.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: jporterbugs <at> gmail.com, larsi <at> gnus.org, eggert <at> cs.ucla.edu,
 bug-gnulib <at> gnu.org, 57129 <at> debbugs.gnu.org
Subject: Re: bug#57129: 29.0.50; Improve behavior of conditionals in Eshell
Date: Tue, 16 Aug 2022 21:59:10 +0200

[Message part 1 (text/plain, inline)]

Eli Zaretskii wrote:
> Looking at your test program, I see that you generate the seconds file
> name without deleting the first one.  When a file by the first
> generated name already exists, gen_tempname will indeed generate a
> different name.  But in the scenario I described, Emacs creates one
> temporary file, uses it, then deletes it, and only after that creates
> another file.

I'm adding this scenario to the unit test. Still, the unit test succeeds
when run once on:
  Linux, FreeBSD, NetBSD, OpenBSD, macOS, Solaris, Cygwin, native Windows.

Since this contradicts what you debugged on mingw, I ran the test 10000
times on native Windows. Result:
  - on 32-bit mingw, no failure.
  - on 64-bit mingw, around 30 failures (or around 10 failures with Paul's
    newest patch). That is, a probability of ca. 0.3% of getting the same
    file name as on the previous call.

Bruno

[0001-tempname-Add-more-tests.patch (text/x-patch, attachment)]

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