GNU bug report logs - #36777
Guix Inferiors: Curious incorrect derivation output bug

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Message #27 received at 36777-done <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Carl Dong <contact <at> carldong.me>
Cc: "36777 <at> debbugs.gnu.org" <36777-done <at> debbugs.gnu.org>
Subject: Re: bug#36777: Guix Inferiors: Curious incorrect derivation output bug
Date: Fri, 16 Aug 2019 23:03:23 +0200

Hi Carl,

Carl Dong <contact <at> carldong.me> skribis:

> Yes! The patch actually fixed the problem when applied on top of 5cf4b26d52bcea382d98fb4becce89be9ee37b55!

[...]

> Not sure what the next steps are for this, but I'd very much like to understand where this went wrong. Perhaps we could write tests for this so it doesn't happen in the future for releases.

Yup, I understood when this could happen (if multiple inputs of a
derivation are “fixed-output” derivations leading to the same output),
wrote a test for that, and came up with a simpler fix in commit
268896444bed7b958add74b2e1e86ff802c5f5cb.

Let me know if anything is amiss!

Thanks for testing the patch,
Ludo’.

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