bug#60875: Grafting breaks with clang-toolchain@13

[Ludovic Courtès]

Here’s what happens:

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$ guix build clang-toolchain@13
The following grafts will be made:
   /gnu/store/gsh6dsafxmkh5wp3cq57czmlz2rc0a7m-clang-toolchain-13.0.1.drv
   /gnu/store/2wa74gbigf0p9ma395qb88983vlwr1w3-clang-runtime-13.0.1.drv
   /gnu/store/iq9n0432xiqnvspwcdy5lskckfzd8jv9-clang-13.0.1.drv
applying 1 graft for clang-runtime-13.0.1 ...
grafting '/gnu/store/qlv8wj8xs8n0ix3843zqzv6xzrk1sf0m-clang-runtime-13.0.1' -> 
'/gnu/store/jx5c9lii5m44ghj054n9vyl3sxsg8z4h-clang-runtime-13.0.1'...
successfully built 
/gnu/store/2wa74gbigf0p9ma395qb88983vlwr1w3-clang-runtime-13.0.1.drv
applying 6 grafts for clang-13.0.1 ...
grafting '/gnu/store/zfs41ixykm4z9162gajgs1ndc6bsbcqr-clang-13.0.1' -> 
'/gnu/store/iv4y7b4rl5bqjib4zna35wc9g61599zm-clang-13.0.1'...
successfully built /gnu/store/iq9n0432xiqnvspwcdy5lskckfzd8jv9-clang-13.0.1.drv
applying 5 grafts for clang-toolchain-13.0.1 ...
grafting 
'/gnu/store/ahg9050hcbcajlyh8hxg3vpawh96s6mz-clang-toolchain-13.0.1-debug' -> 
'/gnu/store/d6ayplxcfv94qs42rdfd5pcjmszzx2hh-clang-toolchain-13.0.1-debug'...
grafting '/gnu/store/0wrp34pb4hrd1vvs7hm4aylx11bipyi9-clang-toolchain-13.0.1' 
-> '/gnu/store/12wnswvdc1mk9cr498dxflxim4qm2pyq-clang-toolchain-13.0.1'...
grafting 
'/gnu/store/6yl60fk3ph988gxj40h95cck88ya2cvg-clang-toolchain-13.0.1-static' -> 
'/gnu/store/axvgyspibna9q487axjbkn22ghvsgvri-clang-toolchain-13.0.1-static'...
Backtrace:
In ice-9/boot-9.scm:
 160: 13 [catch #t #<catch-closure 7ffff5ce7d60> ...]
In unknown file:
   ?: 12 [apply-smob/1 #<catch-closure 7ffff5ce7d60>]
In ice-9/boot-9.scm:
  66: 11 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 10 [eval # #]
In ice-9/boot-9.scm:
2412: 9 [save-module-excursion #<procedure 7ffff5d087c0 at 
ice-9/boot-9.scm:4084:3 ()>]
4089: 8 [#<procedure 7ffff5d087c0 at ice-9/boot-9.scm:4084:3 ()>]
1734: 7 [%start-stack load-stack ...]
1739: 6 [#<procedure 7ffff5d1a6c0 ()>]
In unknown file:
   ?: 5 [primitive-load 
"/gnu/store/axv2m1ck8xnkhgpzzz8bw7jfz9v1164i-clang-toolchain-13.0.1-builder"]
In srfi/srfi-1.scm:
 616: 4 [for-each #<procedure 7ffff41d8f00 at guix/build/graft.scm:445:12 
(hook)> #]
In guix/build/debug-link.scm:
 195: 3 [graft-debug-links (# # #) (# # #) (# # # # ...) ...]
In srfi/srfi-1.scm:
 643: 2 [append-map #<procedure 7ffff5afb1e0 at 
guix/build/debug-link.scm:177:14 (directory)> ...]
 575: 1 [map #<procedure 7ffff5afb1e0 at guix/build/debug-link.scm:177:14 
(directory)> ...]
In unknown file:
   ?: 0 [filter #<procedure 7ffff581c1e0 at guix/build/utils.scm:278:2 (file)> 
#]

ERROR: In procedure filter:
ERROR: In procedure open-file: No such file or directory: 
"/gnu/store/12wnswvdc1mk9cr498dxflxim4qm2pyq-clang-toolchain-13.0.1/lib/libz.so.1.2.11"
builder for 
`/gnu/store/gsh6dsafxmkh5wp3cq57czmlz2rc0a7m-clang-toolchain-13.0.1.drv' failed 
with exit code 1
build of /gnu/store/gsh6dsafxmkh5wp3cq57czmlz2rc0a7m-clang-toolchain-13.0.1.drv 
failed
View build log at 
'/var/log/guix/drvs/gs/h6dsafxmkh5wp3cq57czmlz2rc0a7m-clang-toolchain-13.0.1.drv.gz'.
guix build: error: build of 
`/gnu/store/gsh6dsafxmkh5wp3cq57czmlz2rc0a7m-clang-toolchain-13.0.1.drv' failed
$ guix describe
Generation 241  Jan 16 2023 00:26:44    (current)
  guix 5c92197
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 5c921977179489caef4a9e54ada6696fc86d2f0b
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The file exists but it’s a dangling symlink:

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$ ls -l 
/gnu/store/12wnswvdc1mk9cr498dxflxim4qm2pyq-clang-toolchain-13.0.1/lib/libz.so.1.2.11
lrwxrwxrwx 1 guixbuilder01 guixbuild 74 Jan 17 10:36 
/gnu/store/12wnswvdc1mk9cr498dxflxim4qm2pyq-clang-toolchain-13.0.1/lib/libz.so.1.2.11
 -> /gnu/store/v8d7j5i02nfz951x1szbl9xrd873vc3l-zlib-1.2.12/lib/libz.so.1.2.11
$ stat -L 
/gnu/store/12wnswvdc1mk9cr498dxflxim4qm2pyq-clang-toolchain-13.0.1/lib/libz.so.1.2.11
stat: cannot statx 
'/gnu/store/12wnswvdc1mk9cr498dxflxim4qm2pyq-clang-toolchain-13.0.1/lib/libz.so.1.2.11':
 No such file or directory
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Ludo’.