This, I think, to stop \extrafloats reaching down in to the "classic" range 0-255. I just added the line marked. \documentclass{minimal} \makeatletter \def\extrafloats#1{% \ifnum#1>\z@ \count@\numexpr\float@count-1\relax \ifnum\count@<\@cclvi \ch@ck0\m@ne\insert\fi%<<<<<<<<<<<< \ch@ck0\count@\count \ch@ck1\count@\dimen \ch@ck2\count@\skip \ch@ck4\count@\box \global\e@alloc@chardef\float@count\count@ \global\expandafter\e@alloc@chardef \csname bx@\the\float@count\endcsname\float@count \@cons\@freelist{\csname bx@\the\float@count\endcsname}% \expandafter \extrafloats\expandafter{\numexpr#1-1\relax}% \fi}% \newcommand{\stressInsert}[1]{% \@tempcnta=0\relax% \@whilenum\the\@tempcnta<#1\do% {\advance\@tempcnta +1\relax% \expandafter\newinsert\csname TestInsert\the\@tempcnta\endcsname% \message{insert \the\@tempcnta: \number\csname TestInsert\the\@tempcnta\endcsname, \the\allocationnumber^^J}% }% } \makeatother \stressInsert{70000} \begin{document} \end{document} On Wed, 5 Apr 2023 at 10:40, David Carlisle wrote:

The code (and error messages) you are showing are from latex not from the luatex engine. so should be reported https://github.com/latex3/latex2e/issues not here

If you stress \newinsert that much, as documented in source2e.pdf (ltplain.dtx) it will shuffle some float box allocations around but it does look like it does not correctly trap the end condition. Other engines (even when they have e-tex extended registers) count down from 255 for \newinsert. so get to 0 without any complication around legacy use of 255. lualatex is counting down from a few thousand.

In practice latex doesn't use insert much (it only uses two inserts by default) so apart from test cases this seems unlikely to ever occur in practice but we should probably fix.

At least I suspect a fix is needed, I haven't fully traced what your log is showing yet.

David

On Wed, 5 Apr 2023 at 07:54, Martin Münch wrote:

...

May the file LuaInsert.tex consist of

\documentclass{minimal} \makeatletter \newcommand{\stressInsert}[1]{% \@tempcnta=0\relax% \@whilenum\the\@tempcnta<#1\do% {\advance\@tempcnta +1\relax% \expandafter\newinsert\csname TestInsert\the\@tempcnta\endcsname% \message{insert \the\@tempcnta: \the\allocationnumber^^J}% }% } \makeatother \stressInsert{70000} \begin{document} \end{document}

then

...

lualatex LuaInsert.tex

creates LuaInsert.log, which also contains:

This is LuaHBTeX, Version 1.16.0 (TeX Live 2023) (format=lualatex 2023.4.4) ... \TestInsert1=\insert199 insert 1: 199 \TestInsert2=\insert198 insert 2: 198 ... \TestInsert17=\insert183 insert 17: 183 [ *** 1st JUMP HERE *** ] \TestInsert18=\insert252 insert 18: 252 \TestInsert19=\insert251 insert 19: 251 ... \TestInsert68=\insert202 insert 68: 202 \TestInsert69=\insert201 insert 69: 201 [ *** 2nd JUMP HERE *** ] \TestInsert70=\insert65534 insert 70: 65534 \TestInsert71=\insert65533 insert 71: 65533 ... \TestInsert65350=\insert254 insert 65350: 254 \TestInsert65351=\insert253 insert 65351: 253 \TestInsert65352=\insert252 [ *** AGAIN?! ***] insert 65352: 252 \TestInsert65353=\insert251 [ *** AGAIN?! ***] insert 65353: 251 ... \TestInsert65368=\insert236 [ *** AGAIN?! ***] insert 65368: 236 \TestInsert65369=\insert235 [ *** AGAIN?! ***] insert 65369: 235 ! No room for a new \count . \ch@ck ...\else \errmessage {No room for a new #3} \fi l.12 \stressInsert{70000}

? x

So, are \insert252 to \insert235 used twice?!

And Lua does not even stop there because of "No room for a new insert", but because there is no room for a new \count! Otherwise more inserts would see double use? Should after \insert253 (!, not 235) the next \newinsert produce some error "No room for a new \insert"? _______________________________________________ dev-luatex mailing list dev-luatex@ntg.nl https://mailman.ntg.nl/mailman/listinfo/dev-luatex