From: Gerben Wierda <gerben.wierda@rna.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Trying to understand this ctxlua error
Date: Mon, 6 Apr 2020 00:41:29 +0200 [thread overview]
Message-ID: <2EBF1308-12F4-4EF1-B309-89B403D3FAD6@rna.nl> (raw)
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I got this error after I had changed some lua code:
tex error > tex error on line 272 in file archimate-lua.new: ! Undefined control sequence
warnIfVerbose( "Breaking off the processing of node %s\nNo
l...eak xsi:type", node)
\luat_start_lua_code_indeed ...ormalexpanded {\endgroup \noexpand \directlua {#1
}}
l.272 \stopluacode
<empty file>
The control sequence at the end of the top line of your error message was never
\def'ed. You can just continue as I'll forget about whatever was undefined.
I have been looking at that code for over two hours, not seeing anything wrong with it. But I’ve now finally found the culprit and I still do not get it.
The culprit was:
warnIfVerbose( "Breaking off the processing of %s\n No elementRef", node)
The problem goes away when I use:
warnIfVerbose( "Breaking off the processing of %s\nNo elementRef", node)
(I don’t want the line after the node is printed to begin with a space).
But the lack of space between \n and N kills lua (apparently). For completeness (as string.format and texio.write_nl are also in play):
function warnWithLabelIfVerbose( str, ... )
if verboseProgram then
texio.write_nl( str .. string.format(...))
end
end
function warnIfVerbose( ... )
warnWithLabelIfVerbose("-----> ", ...)
end
Is this a lua bug? A ConTeXt bug? Expected behaviour? And if so, why is reported that on line 272 (where \stopluacode is) is the error? Or is the error message indeed helpful and do I just lack the know how to interpret it?
G
(Took me three hours, this one. Just removing that space that happened with some other changes was the culprit. Totally unexpected for me.)
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next reply other threads:[~2020-04-05 22:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-05 22:41 Gerben Wierda [this message]
2020-04-06 0:54 ` Wolfgang Schuster
2020-04-06 9:48 ` Gerben Wierda
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