problem with pandoc.utils in lua filters

problem with pandoc.utils in lua filters

[Greg Tucker-Kellogg]

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I just updated to the latest lua-filters, and every use of 
pandoc.utils.stringify throws an error, e.g., 

[lua-filters-(git:master)] make

bash runtests.sh abstract-to-meta author-info-blocks bibexport cito 
scholarly-metadata scrlttr2 section-refs short-captions spellcheck task-list 
wordcount
PASS abstract-to-meta
Error running filter author-info-blocks.lua:
Error while running filter function: author-info-blocks.lua:103: attempt to 
index a nil value (field 'utils')
--- - 2018-06-22 13:10:07.567118906 +0800
+++ expected.native 2018-06-21 17:12:08.200722160 +0800
@@ -0,0 +1,5 @@
+Pandoc (Meta {unMeta = fromList [("author",MetaInlines [Str "Jane",Space,
Str "Doe",Superscript [Str "*",Str ",",Str "1",Str ",",Str "\9993"],Str ",",
Space,Str "John",Space,Str "Q.",Space,Str "Doe",Superscript [Str "*",Str ","
,Str "1",Str ",",Str "2"],Str ",",Space,Str "and",Space,Str "Juan",Space,Str 
"P\233rez",Superscript [Str "2"]]),("title",MetaInlines [Str "Affiliation",
Space,Str "Blocks",Space,Str "Example"])]})
+[Para [Superscript [Str "*"],Space,Str "These authors contributed equally 
to this work."]
+,Para [Superscript [Str "1"],Space,Str "Federation",Space,Str "of",Space,
Str "Planets",LineBreak,Superscript [Str "2"],Space,Str "Acme",Space,Str 
"Corporation"]
+,Para [Superscript [Str "\9993"],Space,Str "Correspondence:",Space,Link (""
,[],[]) [Str "Jane",Space,Str "Doe",Space,Str "<",Str "jane.doe-hcDgGtZH8xNBDgjK7y7TUQ@public.gmane.org"
,Str ">"] ("mailto:jane.doe-hcDgGtZH8xNBDgjK7y7TUQ@public.gmane.org","")]
+,Para [Str "Lorem",Space,Str "ipsum",Space,Str "dolor",Space,Str "sit",
Space,Str "amet."]]
Makefile:2: recipe for target 'test' failed
make[1]: *** [test] Error 1
FAIL author-info-blocks
PASS bibexport
PASS cito
Error running filter scholarly-metadata.lua:
Error while running filter function: scholarly-metadata.lua:77: attempt to 
index a nil value (field 'utils')
....


A similar error for section-refs.

I ran across the problem when trying to use Pandoc Scholar 
<https://github.com/pandoc-scholar/pandoc-scholar>. I'm using pandoc 2.2.1,

[lua-filters-(git:master)] pandoc --version
pandoc 2.2.1
Compiled with pandoc-types 1.17.5.1, texmath 0.11.0.1, skylighting 0.7.2
Default user data directory: /home/gtk/.pandoc
Copyright (C) 2006-2018 John MacFarlane
Web:  http://pandoc.org
This is free software; see the source for copying conditions.
There is no warranty, not even for merchantability or fitness
for a particular purpose.


I think this must be something I'm doing wrong, because it would be failing 
the CI tests and other people would notice. Does anyone have a suggestion?

Thanks in advance,

Greg

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Re: problem with pandoc.utils in lua filters

[Albert Krewinkel]

Greg Tucker-Kellogg writes:

> I just updated to the latest lua-filters, and every use of pandoc.utils.stringify throws an error,
> e.g.,
>
> [lua-filters-(git:master)] make
>
> bash runtests.sh abstract-to-meta author-info-blocks bibexport cito scholarly-metadata
> scrlttr2 section-refs short-captions spellcheck task-list wordcount
> PASS abstract-to-meta
> Error running filter author-info-blocks.lua:
> Error while running filter function: author-info-blocks.lua:103: attempt to index a nil value
> (field 'utils')

It looks like `require 'pandoc.utils'` already returns nil, which is
strange (the module exists since pandoc 2.0.6). Many problems with Lua
filters we've seen were related to issues of hslua on 32 bit systems.
How did you install pandoc, from binary or from source? Maybe the issue
is related to this: <https://github.com/jgm/pandoc/issues/4679>

Re: problem with pandoc.utils in lua filters

[Greg Tucker-Kellogg]

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I installed with cabal.

Trying the example filter from <https://github.com/jgm/pandoc/issues/4679 
<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fjgm%2Fpandoc%2Fissues%2F4679&sa=D&sntz=1&usg=AFQjCNEGjszHyFi08bcqjp3xQHBq1DzoDQ>> gives 
me this:

[lua-filters-(git:master)]  echo | pandoc --lua-filter a.lua
Error running filter a.lua:
a.lua:5: attempt to index a nil value (field 'utils')



On Saturday, June 23, 2018 at 5:38:11 AM UTC+8, Albert Krewinkel wrote:
>
> Greg Tucker-Kellogg writes: 
>
> > I just updated to the latest lua-filters, and every use of 
> pandoc.utils.stringify throws an error, 
> > e.g., 
> > 
> > [lua-filters-(git:master)] make 
> > 
> > bash runtests.sh abstract-to-meta author-info-blocks bibexport cito 
> scholarly-metadata 
> > scrlttr2 section-refs short-captions spellcheck task-list wordcount 
> > PASS abstract-to-meta 
> > Error running filter author-info-blocks.lua: 
> > Error while running filter function: author-info-blocks.lua:103: attempt 
> to index a nil value 
> > (field 'utils') 
>
> It looks like `require 'pandoc.utils'` already returns nil, which is 
> strange (the module exists since pandoc 2.0.6). Many problems with Lua 
> filters we've seen were related to issues of hslua on 32 bit systems. 
> How did you install pandoc, from binary or from source? Maybe the issue 
> is related to this: <https://github.com/jgm/pandoc/issues/4679> 
>

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