Re: Lua filter broken after upgrade to 2.15 (macOS)

[John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org>]

I can confirm that using pandoc.Str('') instead of pandoc.Str()
works.


Albert Krewinkel <albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org> writes:

> Can't test right now, but can you try to pass an empty string to pandoc.Str('')?
>
> Am 31. Oktober 2021 14:18:16 MEZ schrieb Philipp <philipp.kupferschmied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>:
>>Hello everyone,
>>
>>I'm experiencing a problem with a self-written Lua-filter after upgrading 
>>to 2.15.
>>
>>The filter ran (and still runs) fine with older versions of pandoc, but 
>>with 2.15 I get the following error:
>>
>>PandocLuaError "Error during function call:\n\tstring expected, got 
>>string\n\twhile retrieving function argument string\n\twhile retrieving 
>>arguments for function Str\nstack traceback:\n\t[C]: in field 
>>'Str'\n\tscripts/klausur.lua:11: in function 
>><scripts/klausur.lua:9>\n\t[C]: in ?\n\t[C]: in field 
>>'walk_block'\n\tscripts/klausur.lua:8: in function 'processheader'"
>>
>>stack traceback:
>>
>>[C]: in field 'walk_block'
>>
>>scripts/klausur.lua:8: in function 'processheader'
>>The corresponding Lua code looks like this (I hope the formatting is 
>>preserved):
>>
>> 7 function processheader(elem)
>> 8     return pandoc.walk_block(elem, {
>> 9         Str = function(elem)
>>10             if string.match(elem.text, "%%%d+p%%") ~= nil then
>>11                 return pandoc.Str()
>>12             end
>>13         end
>>14     })
>>15 end
>>
>>I'd be thankful for any suggestion what is going wrong here.
>>
>>Kind regards,
>>Philipp
>>
>>
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