%% plain tex file for testing memory overflow \tracingstats=2 \newcount\cnt \chardef\nil=0 \cnt=0 \let\tempa=\relax \setbox\nil\hbox{} \def\tempb{\copy\nil} \def\list{\tempa} \def\again{\xdef\list{\list\list}\let\tempa\tempb\leavevmode\list\vfill\eject \let\tempa\relax\advance\cnt1 \ifnum\cnt>19 \let\again\relax\fi\again} \again \end