Pandoc’s Lua filter functionality seems to depend on lua-lpeg, however, it is not listed as dependency. Without lua-lpeg being installed, Pandoc raises the following error when using Lua filters:

$ pandoc -f markdown -t html --lua-filter /dev/null <<<'Test'
Error running filter /dev/null:
module 'lpeg' not found:

lpeg is not one of pandoc's default packages
no field package.preload['lpeg']
no file '/usr/share/lua/5.4/lpeg.lua'
no file '/usr/share/lua/5.4/lpeg/init.lua'
no file '/usr/lib/lua/5.4/lpeg.lua'
no file '/usr/lib/lua/5.4/lpeg/init.lua'
no file './lpeg.lua'
no file './lpeg/init.lua'
no file '/usr/lib/lua/5.4/lpeg.so'
no file '/usr/lib/lua/5.4/loadall.so'
no file './lpeg.so'

lpeg was configured to be excluded from the binary.
return value 83


With lua-lpeg installed:

$ pandoc -f markdown -t html --lua-filter /dev/null <<<'Test'
<p>Test</p>


Note: Pandoc depends on haskell-lpeg so it might actually be a problem with that package. That package currently depends on lua53-lpeg – maybe this dependency is outdated.


Additional info:
* package version(s)
* pandoc 2.18-4
* haskell-lpeg 1.0.2-16
* lua53-lpeg 1.0.2-4