Package: src:snek
Version: 1.13-1
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/202510/

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.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:snek, so that this is still
visible in the BTS web page for this package.

Thanks.

--------------------------------------------------------------------------------
[...]
 debian/rules clean
dh clean
   dh_auto_clean
        make -j2 clean
make[1]: Entering directory '/<<PKGBUILDDIR>>'
for dir in snekde doc examples; do (cd $dir && make PREFIX=/usr DESTDIR= 
clean); done
make[2]: Entering directory '/<<PKGBUILDDIR>>/snekde'
rm -f snekde snekde.desktop
make[2]: Leaving directory '/<<PKGBUILDDIR>>/snekde'
make[2]: Entering directory '/<<PKGBUILDDIR>>/doc'
for i in lessons/lesson-*; do make -C $i clean; done
make[3]: Entering directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-1'
rm -f lesson-1-snekboard.pdf lesson-1-snekboard.html 
rm -f snek.css
rm -f snek.svg snek-theme.yml

[... snipped ...]

        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require': cannot load such file -- prawn/icon (LoadError)
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
make[3]: *** [Makefile:29: snek.pdf] Error 1
asciidoctor-pdf -a optimize --attribute="revdate=2025-09-05" 
--attribute="version=1.13" --attribute='pdf-theme=snek'  lesson-1-snekboard.adoc
make[3]: *** Waiting for unfinished jobs....
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2242:in 
`raise_if_conflicts': Unable to activate prawn-2.4.0, because pdf-core-0.10.0 
conflicts with pdf-core (~> 0.9.0) (Gem::ConflictError)
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1387:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1423:in `block 
in activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in `each'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in 
`activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1389:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:215:in `rescue in 
try_activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:208:in `try_activate'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`block in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`synchronize'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`rescue in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:135:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2242:in 
`raise_if_conflicts': Unable to activate prawn-2.4.0, because pdf-core-0.10.0 
conflicts with pdf-core (~> 0.9.0) (Gem::ConflictError)
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1387:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1423:in `block 
in activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in `each'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in 
`activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1389:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:209:in `try_activate'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`block in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`synchronize'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`rescue in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:135:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require': cannot load such file -- prawn/icon (LoadError)
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
make[4]: *** [Makefile:35: lesson-1-snekboard.pdf] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-1'
make[4]: Entering directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-2'
../../../doc/util/make-steps Line-Bug-??.html > steps.adoc
cp ../../../doc/snek-theme.yml snek-theme.yml
cp ../../../snek.svg snek.svg
cp ../../../doc/snek.css snek.css
asciidoctor -v -B../../.. -B. --attribute="revdate=2025-09-05" 
--attribute="version=1.13" -b html5 lesson-2-line-bug.adoc
asciidoctor-pdf -a optimize -B../../.. -B. --attribute="revdate=2025-09-05" 
--attribute="version=1.13" --attribute='pdf-theme=snek'  lesson-2-line-bug.adoc
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2242:in 
`raise_if_conflicts': Unable to activate prawn-2.4.0, because pdf-core-0.10.0 
conflicts with pdf-core (~> 0.9.0) (Gem::ConflictError)
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1387:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1423:in `block 
in activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in `each'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in 
`activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1389:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:215:in `rescue in 
try_activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:208:in `try_activate'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`block in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`synchronize'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`rescue in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:135:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2242:in 
`raise_if_conflicts': Unable to activate prawn-2.4.0, because pdf-core-0.10.0 
conflicts with pdf-core (~> 0.9.0) (Gem::ConflictError)
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1387:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1423:in `block 
in activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in `each'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in 
`activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1389:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:209:in `try_activate'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`block in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`synchronize'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`rescue in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:135:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require': cannot load such file -- prawn/icon (LoadError)
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
make[4]: *** [Makefile:61: lesson-2-line-bug.pdf] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-2'
make[4]: Entering directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-3'
../../../doc/util/make-steps Bumper-Car-??.html > steps.adoc
cp ../../../doc/snek-theme.yml snek-theme.yml
cp ../../../snek.svg snek.svg
asciidoctor -v -B../../.. -B. --attribute="revdate=2025-09-05" 
--attribute="version=1.13" -b html5 lesson-3-bumper-car.adoc
asciidoctor-pdf -a optimize -B../../.. -B. --attribute="revdate=2025-09-05" 
--attribute="version=1.13" --attribute='pdf-theme=snek'  
lesson-3-bumper-car.adoc
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2242:in 
`raise_if_conflicts': Unable to activate prawn-2.4.0, because pdf-core-0.10.0 
conflicts with pdf-core (~> 0.9.0) (Gem::ConflictError)
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1387:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1423:in `block 
in activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in `each'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in 
`activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1389:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:215:in `rescue in 
try_activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:208:in `try_activate'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`block in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`synchronize'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`rescue in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:135:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2242:in 
`raise_if_conflicts': Unable to activate prawn-2.4.0, because pdf-core-0.10.0 
conflicts with pdf-core (~> 0.9.0) (Gem::ConflictError)
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1387:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1423:in `block 
in activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in `each'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in 
`activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1389:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:209:in `try_activate'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`block in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`synchronize'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`rescue in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:135:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require': cannot load such file -- prawn/icon (LoadError)
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
make[4]: *** [Makefile:58: lesson-3-bumper-car.pdf] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-3'
make[4]: Entering directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-4'
../../../doc/util/make-steps washing-machine-??.html > steps.adoc
cp ../../../doc/snek-theme.yml snek-theme.yml
cp ../../../snek.svg snek.svg
asciidoctor -v -B../../.. -B. --attribute="revdate=2025-09-05" 
--attribute="version=1.13" -b html5 lesson-4-washing-machine.adoc
asciidoctor-pdf -a optimize -B../../.. -B. --attribute="revdate=2025-09-05" 
--attribute="version=1.13" --attribute='pdf-theme=snek'  
lesson-4-washing-machine.adoc
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2242:in 
`raise_if_conflicts': Unable to activate prawn-2.4.0, because pdf-core-0.10.0 
conflicts with pdf-core (~> 0.9.0) (Gem::ConflictError)
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1387:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1423:in `block 
in activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in `each'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in 
`activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1389:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:215:in `rescue in 
try_activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:208:in `try_activate'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`block in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`synchronize'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`rescue in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:135:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2242:in 
`raise_if_conflicts': Unable to activate prawn-2.4.0, because pdf-core-0.10.0 
conflicts with pdf-core (~> 0.9.0) (Gem::ConflictError)
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1387:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1423:in `block 
in activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in `each'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1407:in 
`activate_dependencies'
        from /usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1389:in 
`activate'
        from /usr/lib/ruby/vendor_ruby/rubygems.rb:209:in `try_activate'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`block in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`synchronize'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:139:in 
`rescue in require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:135:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require': cannot load such file -- prawn/icon (LoadError)
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
/usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn/extensions.rb:5:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext/prawn.rb:18:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf/ext.rb:6:in `<top 
(required)>'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in 
`require_relative'
        from /usr/lib/ruby/vendor_ruby/asciidoctor/pdf.rb:20:in `<top 
(required)>'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:136:in 
`require'
        from /usr/bin/asciidoctor-pdf:7:in `<main>'
make[4]: *** [Makefile:73: lesson-4-washing-machine.pdf] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-4'
make[4]: Entering directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-5'
echo 'nothing in lesson 5 yet'
nothing in lesson 5 yet
make[4]: Leaving directory '/<<PKGBUILDDIR>>/doc/lessons/lesson-5'
make[3]: Leaving directory '/<<PKGBUILDDIR>>/doc'
make[2]: *** [Makefile:27: all] Error 1
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
dh_auto_build: error: make -j2 INSTALL="install --strip-program=true" 
SNEK_MOST_WARNINGS="-fdebug-prefix-map=/<<PKGBUILDDIR>>=. -Wall -Wcast-align 
-Wextra -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes 
-Wmissing-declarations -Wnested-externs -Wshadow" SNEK_EV3=0 returned exit code 
2
make[1]: *** [debian/rules:30: override_dh_auto_build-indep] Error 25
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:27: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------

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