! error: (linebreak): invalid list tail, probably missing glue

[u-fischer]

With the following document

\listfiles
\documentclass{article}
\usepackage{luaotfload}
%\font\test={Cambria:mode=base;script=latn;language=DFLT;}
%\font\test={Calibri:mode=base;script=latn;language=DFLT;}
\font\test={SourceSansPro:mode=base;script=latn;language=DFLT;}
\begin{document}

 \test
   iltintin%iltintin %iltinba %atolkinti

\end{document}

I get the error

! error:  (linebreak): invalid list tail, probably missing glue
!  ==> Fatal error occurred, no output PDF file produced!

I'm using a prerelease luaotfload (fontloader-2016-10-21.lua) together with LuaTeX, Version 1.0.0 (MiKTeX 2.9.6100 NEXT).

With the luatex from texlive (LuaTeX, Version 0.95.0) and the same fontloader there is no problem.

The error is related to mode=base. I don't get it with all fonts but the three in the example all show it. It only appears for some combination of chars but I didn't find a understandable pattern.

I got the error also when using the context minimals fontloader, but couldn't reproduce it with context itself.

Edit

It seems to be important that the problematic font with mode base is active at the end of a paragraph:

\documentclass{article}
\usepackage{luaotfload}

\font\testb={SourceSansPro:mode=node;script=latn;language=DFLT;}
\font\test={SourceSansPro:mode=base;script=latn;language=DFLT;}
\begin{document}

\test
   iltintin%iltintin %iltinba %atolkinti
%\par %uncomment to get the error
\testb b   


\end{document}

[phi-gamma]

I get some of these too under certain circumstances, even with the new loader.
The new release does not appear to fix it. I’ll look into it.

[phi-gamma]

2016-11-15 (Tuesday), [email protected] (u-fischer):

I got the error also when using the context minimals fontloader, but couldn't reproduce it with context itself.

Tests for Plain and Context: https://bitbucket.org/phg/lua-la-tex-tests/src/tip/plain/pln-luatex-2-crash-kern-base.tex https://bitbucket.org/phg/lua-la-tex-tests/src/tip/context/cnt-luatex-2-crash-kern-base.tex The latter seems worse in that ``mtxrun`` appears to hang. Terminating it via SIGINT leaks the ``luatex`` process … ugh.

[phi-gamma]

2017-02-03 (Friday), [email protected] (phg):

2016-11-15 (Tuesday), ***@***.*** (u-fischer): > I got the error also when using the context minimals > fontloader, but couldn't reproduce it with context itself. Tests for Plain and Context: https://bitbucket.org/phg/lua-la-tex-tests/src/tip/plain/pln-luatex-2-crash-kern-base.tex https://bitbucket.org/phg/lua-la-tex-tests/src/tip/context/cnt-luatex-2-crash-kern-base.tex The latter seems worse in that ``mtxrun`` appears to hang. Terminating it via SIGINT leaks the ``luatex`` process … ugh.

Backtrace of Luatex hanging with Context: #0 0x0000000000581d09 in add_kern_before (left=1253, right=901) at ../../../source/texk/web2c/luatexdir/font/luafont.w:2035 #1 0x00000000005821a9 in do_handle_kerning (root=2999, init_left=0, init_right=0) at ../../../source/texk/web2c/luatexdir/font/luafont.w:2076 #2 0x0000000000582733 in handle_kerning (head=2999, tail=0) at ../../../source/texk/web2c/luatexdir/font/luafont.w:2132 #3 0x000000000054d7a5 in font_tex_direct_kerning (L=0x2524de0) at ../../../source/texk/web2c/luatexdir/lua/lnodelib.c:4646 #4 0x000000000070b2d7 in luaD_precall (L=0x2524de0, func=0x65fcfb0, nresults=1) at ../../../source/libs/lua52/lua52-src/src/ldo.c:319 #5 0x0000000000723ad4 in luaV_execute (L=0x2524de0) at ../../../source/libs/lua52/lua52-src/src/lvm.c:709 #6 0x000000000070b73e in luaD_call (L=0x2524de0, func=0x65fcd40, nResults=1, allowyield=0) at ../../../source/libs/lua52/lua52-src/src/ldo.c:402 #7 0x0000000000702ba2 in f_call (L=0x2524de0, ud=0x7fff7db55ba0) at ../../../source/libs/lua52/lua52-src/src/lapi.c:923 #8 0x000000000070a900 in luaD_rawrunprotected (L=0x2524de0, f=0x702b6b <f_call>, ud=0x7fff7db55ba0) at ../../../source/libs/lua52/lua52-src/src/ldo.c:131 #9 0x000000000070bea5 in luaD_pcall (L=0x2524de0, func=0x702b6b <f_call>, u=0x7fff7db55ba0, old_top=416, ef=0) at ../../../source/libs/lua52/lua52-src/src/ldo.c:603 #10 0x0000000000702c6e in lua_pcallk (L=0x2524de0, nargs=6, nresults=1, errfunc=0, ctx=0, k=0x0) at ../../../source/libs/lua52/lua52-src/src/lapi.c:949 #11 0x00000000005b7412 in lua_hpack_filter (head_node=1313, size=0, pack_type=1, extrainfo=2, pack_direction=0, attr=794) at ../../../source/texk/web2c/luatexdir/lua/luanode.w:226 #12 0x00000000004d650d in filtered_hpack (p=825, qt=1283, w=0, m=1, grp=2, pac=0, just_pack=0, attr=794) at ../../../source/texk/web2c/luatexdir/tex/packaging.w:1145 #13 0x00000000004d7a4d in package (c=0) at ../../../source/texk/web2c/luatexdir/tex/packaging.w:1604 #14 0x00000000004c8c5c in handle_right_brace () at ../../../source/texk/web2c/luatexdir/tex/maincontrol.w:1190 #15 0x00000000004c8119 in main_control () at ../../../source/texk/web2c/luatexdir/tex/maincontrol.w:910 #16 0x00000000004c4902 in main_body () at ../../../source/texk/web2c/luatexdir/tex/mainbody.w:460 #17 0x000000000048be55 in main (ac=11, av=0x7fff7db55e08) at ../../../source/texk/web2c/luatexdir/luatex.c:579

[phi-gamma]

This particular crash should be fixed by this patch:
phi-gamma@9464944

But there’s at least one similar, equally fatal crash out there
that occurs in node mode.

[u-fischer]

I installed some days ago luatex version 1.0.4 (from w32tex.org) and with it the error seems to be gone. The code compiles with the default fontloader and a current context fontloader.

[u-fischer]

Closing as it is resolved in newer version.