Bug#1151153: retroarch-assets: FTBFS: make[1]: *** [Makefile:52: assets/ozone/png/icons/Nintendo - Game Boy Advance (e-Reader).png] Error 1

[Jonathan McDowell]

On Sat, Oct 17, 2026 at 01:38:28PM +0000, Santiago Vila wrote:
> Package: src:retroarch-assets
> Version: 1.20.0+dfsg-1
> Severity: serious
> Tags: ftbfs forky sid
> 
> Dear maintainer:
> 
> During a rebuild of all packages in unstable, this package failed to build.
> 
> Below you will find the last part of the build log (probably the most
> relevant part, but not necessarily). If required, the full build log
> is available here:
> 
> https://people.debian.org/~sanvila/build-logs/202610/
> 
> About the archive rebuild: The build was made on virtual machines from AWS,
> using sbuild and a reduced chroot with only build-essential packages.
> 
> If you cannot reproduce the bug please contact me privately, as I
> am willing to provide ssh access to a virtual machine where the bug is
> fully reproducible.

I can reproduce this, and it appears to be as a result of a change in 
imagemagick; the actual failure is from a command like:

$ magick mogrify -background 'rgb(255,255,255)' -alpha Background \
	'assets/ozone/png/icons/APF - Imagination Machine.png'

which results in:

mogrify: no encode delegate for this image format `' @ warning/constitute.c/WriteImage/1473.
mogrify: no encode delegate for this image format `' @ error/constitute.c/WriteImage/1482.

There doesn't appear to be anything special about the PNG (which is 
generated by inkscape):

$ magick identify 'assets/ozone/png/icons/APF - Imagination Machine.png'
assets/ozone/png/icons/APF - Imagination Machine.png PNG 46x46 46x46+0+0 8-bit sRGB 982B 0.000u 0:00.000

It obviously works fine with the imagemagick in trixie. I'm not entirely 
sure if there's some upstream change that means I need to modify how 
imagemagick is used, or if there's a bug that's been introduced there.

> If this is really a bug in one of the build-depends, please use
> reassign and add an affects on src:retroarch-assets, so that this is still
> visible in the BTS web page for this package.
> 
> Thanks.
> 
> --------------------------------------------------------------------------------
> [...]
> Exporting src/xmb/monochrome/menu_brightness.svg to assets/ozone/png/icons/menu_brightness.png (46 x 46)
> 
> ** (inkscape:747): WARNING **: 12:57:57.599: Failed to wrap object of type 'GtkRecentManager'. Hint: this error is commonly caused by failing to call a library init() function.
> mogrify: no encode delegate for this image format `' @ warning/constitute.c/WriteImage/1473.
> mogrify: no encode delegate for this image format `' @ error/constitute.c/WriteImage/1482.
> make[1]: *** [Makefile:52: assets/ozone/png/icons/Nintendo - Game Boy Advance (e-Reader).png] Error 1
> make[1]: *** Waiting for unfinished jobs....
> 
> ** (inkscape:765): WARNING **: 12:57:57.634: Failed to wrap object of type 'PangoFT2FontMap'. Hint: this error is commonly caused by failing to call a library init() function.
> 
> ** (inkscape:765): WARNING **: 12:57:57.713: Failed to wrap object of type 'GtkRecentManager'. Hint: this error is commonly caused by failing to call a library init() function.
> mogrify: no encode delegate for this image format `' @ warning/constitute.c/WriteImage/1473.
> mogrify: no encode delegate for this image format `' @ error/constitute.c/WriteImage/1482.
> make[1]: *** [Makefile:52: assets/ozone/png/icons/menu_brightness.png] Error 1
> make[1]: Leaving directory '/<<PKGBUILDDIR>>'
> dh_auto_build: error: make -j2 returned exit code 2
> make: *** [debian/rules:7: binary] Error 25
> dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
> --------------------------------------------------------------------------------
> 
> _______________________________________________
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J.

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