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bug#30155: 'bag-transitive-inputs' behaves non-deterministically

From: Ludovic Courtès
Subject: bug#30155: 'bag-transitive-inputs' behaves non-deterministically
Date: Thu, 18 Jan 2018 18:09:09 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)

address@hidden (Ludovic Courtès) skribis:

> Notice the “kernel-headers” repetition, which is not in the correct
> build script.
> The repetition stems from the traversal done by ‘bag-transitive-inputs’,
> which relies on pointer identity when comparing packages (via the ‘eq?’
> vhash in ‘transitive-inputs’), and for some reason there are two non-eq?
> linux-libre-headers packages encountered here.  ‘master’ doesn’t have
> this problem.

This is fixed by 8102cf0b37e100f760d25b500cf91ed38928615c, which makes
sure there’s only one “linux-libre-boot0” package object.

At some point we could change the way ‘transitive-inputs’ checks for
already-visited node, though I think it’d be hard to avoid relying on


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