bug#39575: guix time-machine fails when a tarball was modified in-place

[Jan Nieuwenhuizen]

Hi,

Trying to travel back to Sun Apr 7 22:07:14 2019 +0200 (commit
56e95d54d209c2428f970d65d9b27ae4168449ad) to re-create mcrl2-minimal by
doing

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guix time-machine --commit=56e95d54d209c2428f970d65d9b27ae4168449ad -- 
environment --ad-hoc mcrl2-minimal
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fails with

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building 
/gnu/store/cjim33x0q1bv1ppkv3qijvr1pvsn4y0q-harfbuzz-2.4.0.tar.bz2.drv...
downloading from 
https://www.freedesktop.org/software/harfbuzz/release/harfbuzz-2.4.0.tar.bz2...
|offloading build of 
/gnu/store/6fgg1irkcvqyb4f9f8n0nzi5gknyqhfn-gcc-mesboot1-4.7.4.drv to 
'kluit.dezyne.org'
- 'build' phasesha256 hash mismatch for 
/gnu/store/b4cdp9sp44848348lrpzbfafhmjqf8nr-harfbuzz-2.4.0.tar.bz2:
  expected hash: 1mpah6kwqid1kxsj4rwqsniivqbrx231j65v51yncx6s0dch0dch
  actual hash:   0vrkvdlmihdg62a4c6h5kx27khc33xmb95l50zgnwnavvpwyyw5l
hash mismatch for store item 
'/gnu/store/b4cdp9sp44848348lrpzbfafhmjqf8nr-harfbuzz-2.4.0.tar.bz2'
build of /gnu/store/cjim33x0q1bv1ppkv3qijvr1pvsn4y0q-harfbuzz-2.4.0.tar.bz2.drv 
failed
View build log at 
'/var/log/guix/drvs/cj/im33x0q1bv1ppkv3qijvr1pvsn4y0q-harfbuzz-2.4.0.tar.bz2.drv.bz2'.
cannot build derivation 
`/gnu/store/p6gfcdacjcqf2br0zwsyzx1chfvg9gxi-harfbuzz-2.4.0.drv': 1 
dependencies couldn't be built
killing process 5083
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The recipe for harfbuzz has a sha256 that used to be valid in April, but
hasn't been valid anymore since May, as this fix

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commit a8bb8fccd82a10a46f127b2235675b4f6cbaaf98
Author: Marius Bakke <address@hidden>
Date:   Sat May 4 18:01:12 2019 +0200

    gnu: harfbuzz: Update source hash.
    
    The previous tarball was modified in-place; see
    <https://github.com/harfbuzz/harfbuzz/issues/1641>.
    
    * gnu/packages/gtk.scm (harfbuzz)[source](sha256): Update.
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shows.  Thoughts?

Greetings,
janneke


-- 
Jan Nieuwenhuizen <address@hidden> | GNU LilyPond http://lilypond.org
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