A minimal example:
--------------- cut --------------------
\def\2#1#2{\vcenter{\halign{\hfil ##\hfil\cr #1\cr#2\cr}}}
\def\ptwo#1#2{\left(\2{#1}{#2}\right)}
\starttext
\startformula
\underbrace{\ptwo{specific}{heat}}_{1}
\stopformula
\stoptext
--------------- cut --------------------
It works with 2013.05.28 00:36 MKIV current, correctly producing
( specific )
heat
(with bigger parens) with an underbrace and a 1 underneath the brace.
With 2013.12.26 12:50 MKIV beta, I get this error:
! Illegal parameter number in definition of \m_math_stackers_text_middle.
system > tex > error on line 7 in file /home/sanjoy/sfse/test3.tex:
Illegal parameter number in definition of ...
1 \def\2#1#2{\vcenter{\halign{\hfil ##\hfil\cr #1\cr#2\cr}}}
2 \def\ptwo#1#2{\left(\2{#1}{#2}\right)}
3
4 \starttext
5
6 \startformula
7 >> \underbrace{\ptwo{specific}{heat}}_{1}
8 \stopformula
9
10 \stoptext
11
<to be read again>
\hfil
\2#1#2l-\vcenter {\halign {\hfil ##\hfil
\cr #1\cr #2\cr }}
\ptwo #1#2l-\left (\2{#1}{#2}
\right )
\math_stackers_make_double ...kers_text_middle {#6
}\edef \p_offset
{\mathsta...
l.7 \underbrace{\ptwo{specific}{heat}}
_{1}
I've attached the log file.
The "\ptwo{specific}{heat}" by itself is fine. Only when it is wrapped
in the \underbrace does the problem occur.
-Sanjoy
(/home/sanjoy/context/tex/texmf-context/tex/context/base/cont-yes.mkiv
ConTeXt ver: 2013.12.26 12:50 MKIV beta fmt: 2013.12.26 int: english/english
system > 'cont-new.mkiv' loaded
(/home/sanjoy/context/tex/texmf-context/tex/context/base/cont-new.mkiv)
system > files > jobname 'test3', input './test3', result 'test3'
fonts > latin modern fonts are not preloaded
languages > language 'en' is active
(/home/sanjoy/sfse/test3.tex{/home/sanjoy/context/tex/texmf-context/fonts/map/pdftex/context/mkiv-base.map}
fonts > preloading latin modern fonts (second stage)
fonts > typescripts > unknown library 'loc'
{/home/sanjoy/context/tex/texmf/fonts/map/dvips/lm/lm-math.map}{/home/sanjoy/context/tex/texmf/fonts/map/dvips/lm/lm-rm.map}
fonts > 'fallback modern rm 12pt' is loaded
backend > xmp > using file
'/home/sanjoy/context/tex/texmf-context/tex/context/base/lpdf-pdx.xml'
pages > flushing realpage 1, userpage 1
)
)</home/sanjoy/context/tex/texmf/fonts/opentype/public/lm-math/latinmodern-math.otf></home/sanjoy/context/tex/texmf/fonts/opentype/public/lm/lmroman12-regular.otf>
system > structure > start used structure
used structure > text: test3
system > structure > stop used structure
system > files > start used files
used file > 1: filename=cont-yes.mkiv filetype=tex
foundname=/home/sanjoy/context/tex/texmf-context/tex/context/base/cont-yes.mkiv
usedmethod=otherwise
used file > 2: filename=cont-new.mkiv filetype=tex
foundname=/home/sanjoy/context/tex/texmf-context/tex/context/base/cont-new.mkiv
usedmethod=otherwise
used file > 3: filename=lang-us.lua filetype=scripts
foundname=/home/sanjoy/context/tex/texmf-context/tex/context/patterns/lang-us.lua
usedmethod=otherwise
used file > 4: filename=/home/sanjoy/sfse/test3.tex
foundname=/home/sanjoy/sfse/test3.tex usedmethod=direct
used file > 5: filename=mkiv-base.map filetype=map format=map
foundname=/home/sanjoy/context/tex/texmf-context/fonts/map/pdftex/context/mkiv-base.map
usedmethod=database
used file > 6: filename=lm.lfg filetype=tex
foundname=/home/sanjoy/context/tex/texmf-context/tex/context/fonts/lm.lfg
usedmethod=otherwise
used file > 7: filename=lm-math.lfg filetype=tex
foundname=/home/sanjoy/context/tex/texmf-context/tex/context/fonts/lm-math.lfg
usedmethod=otherwise
used file > 8: filename=lm-math.map filetype=map format=map
foundname=/home/sanjoy/context/tex/texmf/fonts/map/dvips/lm/lm-math.map
usedmethod=database
used file > 9: filename=lm-rm.map filetype=map format=map
foundname=/home/sanjoy/context/tex/texmf/fonts/map/dvips/lm/lm-rm.map
usedmethod=database
used file > 10: filename=lmroman12-regular filetype=otf format=otf
foundname=/home/sanjoy/context/tex/texmf/fonts/opentype/public/lm/lmroman12-regular.otf
usedmethod=database
used file > 11: filename=latinmodern-math.otf filetype=opentypefonts
foundname=/home/sanjoy/context/tex/texmf/fonts/opentype/public/lm-math/latinmodern-math.otf
usedmethod=database
used file > 12: filename=latinmodern-math.otf filetype=otf format=otf
foundname=/home/sanjoy/context/tex/texmf/fonts/opentype/public/lm-math/latinmodern-math.otf
usedmethod=database
used file > 13: filename=lpdf-pdx.xml filetype=tex
foundname=/home/sanjoy/context/tex/texmf-context/tex/context/base/lpdf-pdx.xml
usedmethod=otherwise
system > files > stop used files
system > options > start commandline options
used option > currentrun="3"
used option > fulljobname="./test3.tex"
used option > input="./test3.tex"
used option > kindofrun="2"
used option > maxnofruns="8"
used option > no-parse-first-line="true"
used option > nonstopmode="true"
used option > passon="-file-line-error -recorder -interaction nonstopmode"
system > options > stop commandline options
system > options > start commandline files
used file > 1: ./test3.tex
system > options > stop commandline files
mkiv lua stats > used config file: selfautoparent:/texmf/web2c/texmfcnf.lua
mkiv lua stats > used cache path:
/home/sanjoy/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e
mkiv lua stats > resource resolver: loadtime 0.014 seconds, 0 scans with
scantime 0.000 seconds, 0 shared scans, 13 found files, scanned paths: <none>
mkiv lua stats > stored bytecode data: 338 modules (0.220 sec), 69 tables
(0.000 sec), 407 chunks (0.220 sec)
mkiv lua stats > cleaned up reserved nodes: 42 nodes, 9 lists of 442
mkiv lua stats > node memory usage: 2 glue, 2 penalty, 9 attribute, 28
glue_spec, 3 attribute_list
mkiv lua stats > node list callback tasks: 6 unique task lists, 6 instances
(re)created, 42 calls
mkiv lua stats > used backend: pdf (backend for directly generating pdf output)
mkiv lua stats > loaded patterns: en::2, load time: 0.000
mkiv lua stats > jobdata time: 0.001 seconds saving, 0.001 seconds loading
mkiv lua stats > callbacks: 150 direct, 178 indirect, 328 total
mkiv lua stats > randomizer: resumed with value 0.86747895500971
mkiv lua stats > result saved in file: test3.pdf, compresslevel 3,
objectcompreslevel 3
mkiv lua stats > loaded fonts: 2 files: latinmodern-math.otf,
lmroman12-regular.otf
mkiv lua stats > fonts load time: 0.324 seconds for 4 fonts, 2 shared in
backend, 2 common vectors, 0 common hashes
mkiv lua stats > used platform: linux, type: unix, binary subtree: texmf-linux
mkiv lua stats > luatex banner: this is luatex, version beta-0.76.0-2013040516
(tex live 2013/dev)(rev 4627)
mkiv lua stats > control sequences: 38336 of 65536 + 100000
mkiv lua stats > current memory usage: 29 MB (ctx: 28 MB)
mkiv lua stats > runtime: 0.769 seconds, 1 processed pages, 1 shipped pages,
1.300 pages/second
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