GNU bug report logs - #48018
ImageMagick’s ‘convert’ fails to delegate to ‘dwebp’

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Subject: =?utf-8?Q?ImageMagick=E2=80=99s_=E2=80=98convert=E2=80=99?= fails
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ImageMagick=E2=80=99s =E2=80=98convert=E2=80=99 refers to the =E2=80=98dweb=
p=E2=80=99 program with a leading
space, which prevents conversion to/from webp:

--8<---------------cut here---------------start------------->8---
$ guix time-machine --commit=3D2a624253bc55e2a94f6581d6e790303575436c96 -- \
   environment -C --ad-hoc strace imagemagick libwebp -- \
   strace -f -e execve convert t.webp t.png
execve("/gnu/store/2rmnafvwqvl460qa370gn18yl09dx91h-profile/bin/convert", [=
"convert", "t.webp", "t.png"], 0x7ffe6637b988 /* 10 vars */) =3D 0
strace: Process 5 attached
[pid     5] execve("/gnu/store/2rmnafvwqvl460qa370gn18yl09dx91h-profile/bin=
/ dwebp", [" dwebp", "-pam", "/tmp/magick-FacyU5v0_s0CnpxpMzs0"..., "-o", "=
/tmp/magick-4R_OusxZBx5fjGrfq0KU"...], 0x7ffd7f3538e8 /* 10 vars */) =3D -1=
 ENOENT (No such file or directory)
[pid     5] +++ exited with 1 +++
--- SIGCHLD {si_signo=3DSIGCHLD, si_code=3DCLD_EXITED, si_pid=3D5, si_uid=
=3D1000, si_status=3D1, si_utime=3D0, si_stime=3D0} ---
convert: unable to open image `t.webp': No such file or directory @ error/b=
lob.c/OpenBlob/2924.
convert: delegate failed `' dwebp' -pam '%i' -o '%o'' @ error/delegate.c/In=
vokeDelegate/1970.
convert: unable to open file `/tmp/magick-e8GzrEcauG0mZICNZggy_vG77mtn29lu'=
: No such file or directory @ error/constitute.c/ReadImage/615.
convert: no images defined `t.png' @ error/convert.c/ConvertImageCommand/32=
29.
+++ exited with 1 +++
--8<---------------cut here---------------end--------------->8---

Ludo=E2=80=99.