Bug in lmtx in display mathmode

Bug in lmtx in display mathmode

[Otared Kavian]

Hi Hans,

I have a long document which typesets correctly with mkiv, but I get a (cryptic for me…) fatal error message when I try to typeset it in lmtx:

! error:  (nodes): trying to delete an attribute reference of a non attribute list node 4476mtx-context     | fatal error: return code: 256

I could finally find the origin of the error, which is exposed in the following example: if you comment out the part from \startformula ... \stopformula, the file typesets correctly.
But with this part, one gets the above error message, the culprit being \liminfbar which is defined in the first line. Note that \liminfbar is accepted when it is inline math.

Best regards: OK

%%% begin bug-math-lmtx.tex

\definemathcommand[liminfbar][limop] {\underline{\mfunctionlabeltext{lim}}}

\starttext
If $(u_{n})_{n}$ is a sequence of real numbers, we define its {\it limit inferior}, denoted $\liminfbar$ by setting:
\startformula
a_{n} := \inf\{u_{k} \; ; \; k \geq n \},
\qquad\text{and then}\quad
\liminfbar_{n\to\infty} u_{n} := \sup_{n \geq 1} a_{n}.
\stopformula 

\stoptext

%%% end bug-math-lmtx.tex
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Re: Bug in lmtx in display mathmode

[Hans Hagen]

On 8/19/2019 12:20 AM, Otared Kavian wrote:
> Hi Hans,
> 
> I have a long document which typesets correctly with mkiv, but I get a (cryptic for me…) fatal error message when I try to typeset it in lmtx:
> 
> ! error:  (nodes): trying to delete an attribute reference of a non attribute list node 4476mtx-context     | fatal error: return code: 256
> 
> I could finally find the origin of the error, which is exposed in the following example: if you comment out the part from \startformula ... \stopformula, the file typesets correctly.
> But with this part, one gets the above error message, the culprit being \liminfbar which is defined in the first line. Note that \liminfbar is accepted when it is inline math.
> 
> Best regards: OK
> 
> %%% begin bug-math-lmtx.tex
> 
> \definemathcommand[liminfbar][limop] {\underline{\mfunctionlabeltext{lim}}}
> 
> \starttext
> If $(u_{n})_{n}$ is a sequence of real numbers, we define its {\it limit inferior}, denoted $\liminfbar$ by setting:
> \startformula
> a_{n} := \inf\{u_{k} \; ; \; k \geq n \},
> \qquad\text{and then}\quad
> \liminfbar_{n\to\infty} u_{n} := \sup_{n \geq 1} a_{n}.
> \stopformula
> 
> \stoptext
> 
> %%% end bug-math-lmtx.tex
also in yesterdays beta?

Hans

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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