bug#57478: meson-build-system's shrink-path phase can fail

[Maxim Cournoyer]

Hi,

While updating Mutter to version 42.4, I encountered this:

--8<---------------cut here---------------start------------->8---
starting phase `shrink-runpath'
error: in phase 'shrink-runpath': uncaught exception:
wrong-type-arg "struct-vtable" "Wrong type argument in position ~A (expecting 
~A): ~S" (1 "struct" #f) (#f) 
phase `shrink-runpath' failed after 0.0 seconds
Backtrace:
          10 (primitive-load "/gnu/store/l5ri9gc942zpr8hqags8gl66ck0…")
In guix/build/gnu-build-system.scm:
    906:2  9 (gnu-build #:source _ #:outputs _ #:inputs _ #:phases . #)
In ice-9/boot-9.scm:
  1752:10  8 (with-exception-handler _ _ #:unwind? _ # _)
In srfi/srfi-1.scm:
    634:9  7 (for-each #<procedure 7fffeebdb2a0 at guix/build/gnu-b…> …)
In ice-9/boot-9.scm:
  1752:10  6 (with-exception-handler _ _ #:unwind? _ # _)
In guix/build/gnu-build-system.scm:
   927:23  5 (_)
In guix/build/meson-build-system.scm:
    105:2  4 (shrink-runpath #:elf-directories _ #:outputs _)
In srfi/srfi-1.scm:
    634:9  3 (for-each #<procedure handle-output (expr)> (("out" . #)))
    634:9  2 (for-each #<procedure strip-runpath (file)> ("/gnu/s…" …))
In ice-9/boot-9.scm:
  1685:16  1 (raise-exception _ #:continuable? _)
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
In procedure struct-vtable: Wrong type argument in position 1 (expecting 
struct): #f
builder for `/gnu/store/r5w8fl87b1ps7rdj9cn6w198qik5i9x5-mutter-42.4.drv' 
failed with exit code 1
@ build-failed /gnu/store/r5w8fl87b1ps7rdj9cn6w198qik5i9x5-mutter-42.4.drv - 1 
builder for `/gnu/store/r5w8fl87b1ps7rdj9cn6w198qik5i9x5-mutter-42.4.drv' 
failed with exit code 1
derivation '/gnu/store/r5w8fl87b1ps7rdj9cn6w198qik5i9x5-mutter-42.4.drv' 
offloaded to 'localhost' failed: build of 
`/gnu/store/r5w8fl87b1ps7rdj9cn6w198qik5i9x5-mutter-42.4.drv' failed
build of /gnu/store/r5w8fl87b1ps7rdj9cn6w198qik5i9x5-mutter-42.4.drv failed
View build log at 
'/var/log/guix/drvs/r5/w8fl87b1ps7rdj9cn6w198qik5i9x5-mutter-42.4.drv'.
--8<---------------cut here---------------end--------------->8---

I do not have the head clear enough to pursue investigating this now,
but it should be reproducible by undeleting the shrink-path phase of the
mutter 42.4 update that I should push soon.

Thanks,

Maxim