daleif
commented
3 years ago Just FYI AFAIR the SK prefix is in relation to the showkeys package, so it is problably to better interact with the showkeys package.
Open gabor-braun opened 3 years ago
daleif
commented
3 years ago Just FYI AFAIR the SK prefix is in relation to the showkeys package, so it is problably to better interact with the showkeys package.
FrankMittelbach
commented
3 years ago oh recursion :-) As Michael Downes mentioned in one of the comments from 1999 or so his solution is non-reentrant and with \eqrefwe reenter resulting in \tagform@ calling itself repeatedly, hence the stack overflow.
Without the showkey interaction sorted out a quick fix would be
\makeatletter
\let\@@tagform@\tagform@
\renewcommand{\eqref}[1]{\textup{\@@tagform@{\ref{#1}}}}
\makeatletter@FrankMittelbach any idea why the problem is not present if one uses align instead of equation?
FrankMittelbach
commented
3 years ago @daleif kind of: align doesn't alter \tag probably because it is really a table that pretends to be a display and not a normal mathdisplay in the TeX sense with leqno end eqno and the like. But I haven't looked very much. And since it doesn't alter \tagform@ there is no recursion issue.
FrankMittelbach
commented
3 years ago The definition
\def\SK@tagform@{#2\@gobble}looks suspicious to me: what will\@gobbleactually gobble?
@gabor-braun it is called with an argument and the \@gobble gobbles that. Short for
\def\SK@tagform@##1{#2} Michael Downes saving 2 tokens (or even more) 30 years ago, that was a good thing to do.
gabor-braun
commented
3 years ago The definition \def\SK@tagform@{#2\@gobble} looks suspicious to me: what will \@gobble actually gobble? it is called with an argument and the \@gobble gobbles that. Short for \def\SK@tagform@##1{#2}
Thank you for the explanation! However, replacing the argument with a fixed one seems to be the wrong thing to do, leading to infinite recurson in this case. Schematically the equation tag expands:
[\eqref{eq:1}a] ==> [\tagform@{1}a] ==> [[\eqref{eq:1}a]a] ==> ...
(treating for simplicity \tagform@ as equal to \SK@tagform@).
To quote @biefloch from bug #118:
In amsmath.dtx itself, when \tag is used inside an equation (or equation) >environment, see \tag@in@display. Then two definitions occur: \alt@tag is >defined to change \tagform@ and \df@tag is defined to call >\maketag@@@. Elsewhere, the code runs \alt@tag \df@tag in this order: >the first redefines \tagform@ to not call \maketag@@@, but then the >\df@tag simply calls \maketag@@@. In fact, I cannot see how \alt@tag has any useful effect in this scenario.
FrankMittelbach
commented
3 years ago Thank you for the explanation! However, replacing the argument with a fixed one seems to be the wrong thing to do, leading to infinite recurson in this case. Schematically the equation tag expands:
sure, I wasn't commenting on this, even though that is also addressed by the simple fix I suggested. But midterm Bruno's approach should be taken. Hwever, neither will go into the next release as that is finalized and the dev version will hit the streets during the next days.
gabor-braun
commented
3 years ago I understand that it is too late to fix this for the upcoming release.
The simple fix unfortunately interferes with mathtools, which redefines \tagform@. The following still typesets some equation tags with parentheses instead of braces:
\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\makeatletter
\let\@@tagform@\tagform@
\renewcommand{\eqref}[1]{\textup{\@@tagform@{\ref{#1}}}}
\makeatletter
\usepackage{mathtools}
\newtagform{braces}{\{}{\}}
\begin{document}
\usetagform{braces}
\begin{equation}
\label{eq:1}
A = B
\end{equation}
\begin{equation}
\label{eq:2}
C > D \tag*{[\eqref{eq:1}a]}
\end{equation}
Equations: \eqref{eq:1}, \eqref{eq:2}.
\end{document}While the \alt@tag removal does not:
\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\makeatletter
\def\tag@in@display@a#1#2{%
\iftag@
\invalid@tag{Multiple \string\tag}\relax
\else
\global\tag@true \nonumber \reset@equation \st@rredtrue
\if *\string#1%
%% Comment out redefinition of \alt@tag
% \gdef\alt@tag{\def\SK@tagform@{#2\@gobble}%
% \ifx\SK@@label\relax \let\tagform@\SK@tagform@ \fi
% }%
\make@df@tag@@{#2}%
\else
\make@df@tag@@@{#2}%
\fi
\fi
}
\makeatother
\usepackage{mathtools}
\newtagform{braces}{\{}{\}}
\begin{document}
\usetagform{braces}
\begin{equation}
\label{eq:1}
A = B
\end{equation}
\begin{equation}
\label{eq:2}
C > D \tag*{[\eqref{eq:1}a]}
\end{equation}
Equations: \eqref{eq:1}, \eqref{eq:2}.
\end{document}For compatibility to showkeys, \eqref seems to be made robust.
Minimal file
\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\makeatletter
\def\tag@in@display@a#1#2{%
\iftag@
\invalid@tag{Multiple \string\tag}\relax
\else
\global\tag@true \nonumber \reset@equation \st@rredtrue
\if *\string#1%
%% Comment out redefinition of \alt@tag
% \gdef\alt@tag{\def\SK@tagform@{#2\@gobble}%
% \ifx\SK@@label\relax \let\tagform@\SK@tagform@ \fi
% }%
\make@df@tag@@{#2}%
\else
\make@df@tag@@@{#2}%
\fi
\fi
}
\makeatother
\usepackage{showkeys}
\begin{document}
\begin{equation}
\label{eq:1}
A = B
\end{equation}
\begin{equation}
\label{eq:2}
C > D \tag*{[\eqref{eq:1}a]}
\end{equation}
Equations: \eqref{eq:1}, \eqref{eq:2}.
\end{document}Log file after first run, note the warnings about incomplete \if.
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)
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Package: showkeys 2014/10/28 v3.17 Show cite and label keys (DPC, MH)
)
No file amsmath-tag-eqref.aux.
\openout1 = `amsmath-tag-eqref.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 25.
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LaTeX Warning: Reference `eq:1' on page 1 undefined on input line 35.
LaTeX Warning: Reference `eq:1' on page 1 undefined on input line 37.
LaTeX Warning: Reference `eq:2' on page 1 undefined on input line 37.
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LaTeX Warning: There were undefined references.
LaTeX Warning: Label(s) may have changed. Rerun to get cross-references right.
)
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.aux file: note spurious things like \let\gdef and \let \hbox.
\relax
\newlabel{eq:1}{{1}{1}}
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./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
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LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 25.
LaTeX Font Info: ... okay on input line 25.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 25.
LaTeX Font Info: ... okay on input line 25.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 25.
LaTeX Font Info: ... okay on input line 25.
LaTeX Font Warning: Command \relax \fontsize {10.95}{13.6}\selectfont \abovedis
playskip 11\p@ plus3\p@ minus6\p@ \abovedisplayshortskip \z@ plus3\p@ \belowdis
playshortskip 6.5\p@ plus3.5\p@ minus3\p@ \def \leftmargin \leftmargini \parsep
5\p@ plus2.5\p@ minus\p@ \topsep 10\p@ plus4\p@ minus6\p@ \itemsep 5\p@ plus2.
5\p@ minus\p@ {\leftmargin \leftmargini \topsep 9\p@ plus3\p@ minus5\p@ \parsep
4.5\p@ plus2\p@ minus\p@ \itemsep \parsep }\belowdisplayskip \abovedisplayskip
invalid in math mode on input line 37.
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
LaTeX Font Warning: Command \footnotesize invalid in math mode on input line 37
.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: LaTeX Error: Command \ttfamily invalid in math mode
.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Please use the math alphabet \mathtt instead of the \ttfamily command.
./amsmath-tag-eqref.tex:37: Missing } inserted.
<inserted text>
}
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:37: Missing } inserted.
<inserted text>
}
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:37: Missing } inserted.
<inserted text>
}
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
LaTeX Font Warning: Command \relax \fontsize {10.95}{13.6}\selectfont \abovedis
playskip 11\p@ plus3\p@ minus6\p@ \abovedisplayshortskip \z@ plus3\p@ \belowdis
playshortskip 6.5\p@ plus3.5\p@ minus3\p@ \def \leftmargin \leftmargini \parsep
5\p@ plus2.5\p@ minus\p@ \topsep 10\p@ plus4\p@ minus6\p@ \itemsep 5\p@ plus2.
5\p@ minus\p@ {\leftmargin \leftmargini \topsep 9\p@ plus3\p@ minus5\p@ \parsep
4.5\p@ plus2\p@ minus\p@ \itemsep \parsep }\belowdisplayskip \abovedisplayskip
invalid in math mode on input line 37.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:38: Infinite glue shrinkage found in a paragraph.
\newpage ...k \@nobreakfalse \everypar {}\fi \par
\ifdim \prevdepth >\z@ \vs...
l.38 \end{document}
The paragraph just ended includes some glue that has
infinite shrinkability, e.g., `\hskip 0pt minus 1fil'.
Such glue doesn't belong there---it allows a paragraph
of any length to fit on one line. But it's safe to proceed,
since the offensive shrinkability has been made finite.
Overfull \hbox (114.24394pt too wide) in paragraph at lines 37--38
[]\OT1/cmr/m/n/12 to|$[]$ 1)to|\OT1/cmtt/m/n/10.95 eq:2[]
[]
(./amsmath-tag-eqref.aux)
./amsmath-tag-eqref.tex:38: You can't use `\end' in internal vertical mode.
\enddocument ... \endgroup \deadcycles \z@ \@@end
l.38 \end{document}
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Extra \endgroup.
<recently read> \endgroup
l.38 \end{document}
Things are pretty mixed up, but I think the worst is over.
)
! Emergency stop.
<*> \input amsmath-tag-eqref.tex
*** (job aborted, no legal \end found)
Here is how much of TeX's memory you used:
912 strings out of 493817
10325 string characters out of 6156337
70043 words of memory out of 5000000
4694 multiletter control sequences out of 15000+600000
7686 words of font info for 29 fonts, out of 8000000 for 9000
417 hyphenation exceptions out of 8191
35i,11n,25p,3260b,212s stack positions out of 5000i,500n,10000p,200000b,80000s
! ==> Fatal error occurred, no output PDF file produced!
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
LaTeX Font Warning: Command \footnotesize invalid in math mode on input line 37
.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: LaTeX Error: Command \ttfamily invalid in math mode
.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Please use the math alphabet \mathtt instead of the \ttfamily command.
./amsmath-tag-eqref.tex:37: Missing } inserted.
<inserted text>
}
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:37: Missing } inserted.
<inserted text>
}
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:37: Missing } inserted.
<inserted text>
}
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
LaTeX Font Warning: Command \relax \fontsize {10.95}{13.6}\selectfont \abovedis
playskip 11\p@ plus3\p@ minus6\p@ \abovedisplayshortskip \z@ plus3\p@ \belowdis
playshortskip 6.5\p@ plus3.5\p@ minus3\p@ \def \leftmargin \leftmargini \parsep
5\p@ plus2.5\p@ minus\p@ \topsep 10\p@ plus4\p@ minus6\p@ \itemsep 5\p@ plus2.
5\p@ minus\p@ {\leftmargin \leftmargini \topsep 9\p@ plus3\p@ minus5\p@ \parsep
4.5\p@ plus2\p@ minus\p@ \itemsep \parsep }\belowdisplayskip \abovedisplayskip
invalid in math mode on input line 37.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: A <box> was supposed to be here.
<to be read again>
\hbox
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. So you might find something missing in
your output. But keep trying; you can fix this later.
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:37: Missing number, treated as zero.
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
./amsmath-tag-eqref.tex:37: Illegal unit of measure (pt inserted).
<to be read again>
{
l.37 Equations: \eqref{eq:1}, \eqref{eq:2}
.
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)
./amsmath-tag-eqref.tex:38: Infinite glue shrinkage found in a paragraph.
\newpage ...k \@nobreakfalse \everypar {}\fi \par
\ifdim \prevdepth >\z@ \vs...
l.38 \end{document}
The paragraph just ended includes some glue that has
infinite shrinkability, e.g., `\hskip 0pt minus 1fil'.
Such glue doesn't belong there---it allows a paragraph
of any length to fit on one line. But it's safe to proceed,
since the offensive shrinkability has been made finite.
Overfull \hbox (114.24394pt too wide) in paragraph at lines 37--38
[]\OT1/cmr/m/n/12 to|$[]$ 1)to|\OT1/cmtt/m/n/10.95 eq:2[]
[]
(./amsmath-tag-eqref.aux)
./amsmath-tag-eqref.tex:38: You can't use `\end' in internal vertical mode.
\enddocument ... \endgroup \deadcycles \z@ \@@end
l.38 \end{document}
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Missing } inserted.
<inserted text>
}
l.38 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
./amsmath-tag-eqref.tex:38: Extra \endgroup.
<recently read> \endgroup
l.38 \end{document}
Things are pretty mixed up, but I think the worst is over.
)
! Emergency stop.
<*> \input amsmath-tag-eqref.tex
*** (job aborted, no legal \end found)
Here is how much of TeX's memory you used:
912 strings out of 493817
10325 string characters out of 6156337
70043 words of memory out of 5000000
4694 multiletter control sequences out of 15000+600000
7686 words of font info for 29 fonts, out of 8000000 for 9000
417 hyphenation exceptions out of 8191
35i,11n,25p,3260b,212s stack positions out of 5000i,500n,10000p,200000b,80000s
! ==> Fatal error occurred, no output PDF file produced!Whereas the following compiles without error. Even though the keys shown for \eqref{eq:2} overlap, and hence not very readable.
\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\makeatletter
\def\tag@in@display@a#1#2{%
\iftag@
\invalid@tag{Multiple \string\tag}\relax
\else
\global\tag@true \nonumber \reset@equation \st@rredtrue
\if *\string#1%
%% Comment out redefinition of \alt@tag
% \gdef\alt@tag{\def\SK@tagform@{#2\@gobble}%
% \ifx\SK@@label\relax \let\tagform@\SK@tagform@ \fi
% }%
\make@df@tag@@{#2}%
\else
\make@df@tag@@@{#2}%
\fi
\fi
}
\makeatother
\MakeRobust\eqref
\usepackage{showkeys}
\begin{document}
\begin{equation}
\label{eq:1}
A = B
\end{equation}
\begin{equation}
\label{eq:2}
C > D \tag*{[\eqref{eq:1}a]}
\end{equation}
Equations: \eqref{eq:1}, \eqref{eq:2}.
\end{document}
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Brief outline of the bug
The minimal example file does not compile: TeX stops with error
TeX capacity exceeded, sorry [grouping levels=255].Minimal example showing the bug
Log file (required) and possibly PDF file
Proposed solution
The following seems to compile correctly. The only change is that
\tag@inädisplay@afrom amsmath is redefined: the redefinition of\alt@tagremoved. The definition\def\SK@tagform@{#2\@gobble}looks suspicious to me: what will\@gobbleactually gobble? (The usefulness of\alt@taghas been already questioned in bug #118.)