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Reply-To: Mailing list for the LaTeX3 project <LATEX-L@vm.urz.Uni-Heidelberg.de>
Date:         Thu, 25 Mar 93 14:40:47 GMT
From: CHAA006@VAX.RHBNC.AC.UK
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To: Multiple Recipients of <LATEX-L@vm.urz.Uni-Heidelberg.de>
Subject:      Bug in LaTeX.
Status: R
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The following short LaTeX-2.09 file appears to demonstrate a bug in LaTeX,
which goes into an infinite loop; the significant part of the log file is
appended.  The problem was reported by Adrian Johnstone of the Department of
Computer Science at RHBNC.

					Philip Taylor, RHBNC
--------
\tracingall
\documentstyle {article}
\begin {document}
\tracingall
\begin {enumerate}
\section {foo}
\end {enumerate}
\end {document}
--------
This is TeX, Version 3.141 [PD VMS 3.4] (preloaded format=lplain 92.7.10)  25 MA
 R 1993 14:01
[...]
\@xsect #1->\@tempskipa #1\relax \ifdim \@tempskipa >\z@ \par \nobreak \vskip \
@tempskipa \@afterheading \else \global \@nobreakfalse \global \@noskipsectrue
\everypar {\if@noskipsec \global \@noskipsecfalse \clubpenalty \@M \hskip -\par
indent \begingroup \@svsechd \endgroup \unskip \hskip -#1\relax \else \clubpena
lty \@clubpenalty \everypar {}\fi }\fi \ignorespaces
#1<-2.3ex plus .2ex
{\skip19}
{\relax}
{\ifdim}
{true}

\par ->\if@newlist \else {\@@par }\fi
{\iftrue}
{true}
{\else}

\nobreak ->\penalty \@M
{\penalty}
{\vskip}

\par ->\if@newlist \else {\@@par }\fi
{\iftrue}
{true}
{\else}
{\vskip}

\par ->\if@newlist \else {\@@par }\fi
{\iftrue}
{true}
{\else}
{\vskip}

[etc...]