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Date: Sun, 14 Jun 2026 23:53:34 +0200
From: Santiago Vila <sanvila@debian.org>
To: =?utf-8?B?Sm9zw6k=?= Luis Blanco-Claraco <jlblanco@ual.es>
Cc: 1139981-done@bugs.debian.org
Subject: Re: Bug#1139981: nanoflann: FTBFS: flaky test:
 kdtree.L1_vs_bruteforce_rknn
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X-Debian-User: sanvila

Version: 1.10.1+ds-1

On Sun, Jun 14, 2026 at 09:49:50PM +0200, José Luis Blanco-Claraco wrote:
> If I recall right, this was fixed in a recent upstream release, updating
> the release should mark this as solved (this bug should be in the changelog
> as fixed upstream).

Timo uploaded 1.10.1 today and there was no mention of this in debian/changelog,
and I could not find the test name in CHANGELOG.rst.

But I see this in the git history:

commit 4a24515c8c129ce73331a19eebbfd77809f17858
Author: Julien Schueller <schueller@phimeca.com>
Date:   Fri May 29 13:43:34 2026 +0200

    fix flaky kdtree.L1_vs_bruteforce_rknn test
    
    Three related issues caused random failures:
    - Brute force used hardcoded double while the kd-tree used NUM (float),
      causing nFound > bf_nn.size() at the radius boundary.
    - Brute force used <= (non-strict) but the kd-tree uses < (strict).
    - No bounds check: the comparison loop walked past bf_nn.end() and
      called map::at with indices missing from the brute-force set.


so yes, I believe it's fixed.

(I also built it 100 times right now with zero failures, but I did not
measure accurately the failure rate of the previous version. If I'm wrong
and the failure rate is just below 1/100, we can always reopen later...).

Thanks.]