“PANIC” error message with custom writer

[Gordon Steemson <gsteemso-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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Hi all,

I am using Pandoc (by way of a Perl script called from within TextWrangler 
on Mac OS 10.6.8) to publish my amateurish scribblings to a variety of fan 
fiction repositories on the Web. All of them bar my own personal site use 
an extremely crippled subset of HTML with no stylesheet support as an input 
format, and just to make things extra fun, the nature of the HTML crippling 
varies from repository to repository. This is easily gotten around in 
theory by making a custom writer for each repository, but the first one I 
tried (for fanfiction.net) is giving me serious and intractable problems.

First was the fact that nowhere is it apparently documented what directory 
the “-t path/to/custom_writer.lua” is relative to (it definitely isn’t the 
same directory the “templates” folder lives in), and using “~” as an 
abbreviation for my home directory is apparently not supported. I finally 
got around that one by specifying an absolute path from the root of my 
filesystem, which seems unnecessarily fragile and inflexible.

Second, when I FINALLY got the damn thing to actually try to call the 
custom writer, it immediately bombed out with the following error message:

>
> PANIC: unprotected error in call to Lua API (attempt to call a string 
value)
>

This is… less than informative. Does anyone have any idea what’s going on 
here? I went over my modifications to the sample.lua file and I can’t find 
anything very different from what was supplied initially—my changes were 
almost all cosmetic, of the “turn an insertion of unsupported HTML tag X 
into an insertion of <p> (or <b>, or whatever)” variety. In the absence of 
more helpful diagnostic messages, I am completely at a loss for how to 
proceed.

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