[luatex] Recent 'luatex' dumps core

[Andreas Scherer]

Happy New Year!

Seeing that the recent Github Actions report "Segmentation fault (core 
dumped)", see 
<https://github.com/TeX-Live/texlive-source/actions/runs/12590089294>, I 
tried the usual test with the current TeX Live source tree.

Building seemed to go fine (haven't checked en detail), but after 
copying the resulting 'luatex' executable to the 'bin/x86_64-linux' 
directory, 'luatex common.tex' (from CWEB) crashes with the attached log 
file and this console output. The resulting PDF file is perfectly fine, 
but at the end the 'Segmentation fault' occurs:

This is LuaTeX, Version 1.20.0 (TeX Live 2025/dev)
  system commands enabled.
(./common.tex 
(/opt/texlive/2024/texmf-dist/tex/plain/cweb/cwebbin/Xcwebmac.tex
(/opt/texlive/2024/texmf-dist/tex/plain/cweb/cwebmac.tex
(/opt/texlive/2024/texmf-dist/tex/generic/iftex/iftex.sty)
(/opt/texlive/2024/texmf-dist/tex/plain/cweb/cwebacromac.tex)))
(/opt/texlive/2024/texmf-dist/tex/plain/cweb/cwebbin/pdfwebtocfront.tex) *1
[1{/opt/texlive/2024/texmf-var/fonts/map/pdftex/updmap/pdftex.map}] [2]
[3] [4] [5] [6] *21 [7] *22 [8] *25 [9] [10] [11] [12] [13] [14] [15] *43
[16] [17] [18] [19] [20] [21] [22] [23] *65 [24] [25] *73 [26] [27] [28]
[29] *83 [30] *85 Index: (./common.idx [31] [32]) [33] (./common.toc)
Number of named sections: (./common.scn) 29 Section names: (./common.scn)
[34] Table of contents: (./common.toc) 
[0])</opt/texlive/2024/texmf-dist/fonts/
type1/public/amsfonts/cm/cmbx10.pfb></opt/texlive/2024/texmf-dist/fonts/type1/p
ublic/amsfonts/cm/cmmi10.pfb></opt/texlive/2024/texmf-dist/fonts/type1/public/a
msfonts/cm/cmmi7.pfb></opt/texlive/2024/texmf-dist/fonts/type1/public/amsfonts/
cm/cmr10.pfb></opt/texlive/2024/texmf-dist/fonts/type1/public/amsfonts/cm/cmr7.
pfb></opt/texlive/2024/texmf-dist/fonts/type1/public/amsfonts/cm/cmr8.pfb></opt
/texlive/2024/texmf-dist/fonts/type1/public/amsfonts/cm/cmr9.pfb></opt/texlive/
2024/texmf-dist/fonts/type1/public/amsfonts/cm/cmsl10.pfb></opt/texlive/2024/te
xmf-dist/fonts/type1/public/amsfonts/cm/cmss10.pfb></opt/texlive/2024/texmf-dis
t/fonts/type1/public/amsfonts/cm/cmsy10.pfb></opt/texlive/2024/texmf-dist/fonts
/type1/public/amsfonts/cm/cmsy7.pfb></opt/texlive/2024/texmf-dist/fonts/type1/p
ublic/amsfonts/cm/cmtex10.pfb></opt/texlive/2024/texmf-dist/fonts/type1/public/
amsfonts/cm/cmti10.pfb></opt/texlive/2024/texmf-dist/fonts/type1/public/amsfont
s/cm/cmtt10.pfb>
Output written on common.pdf (35 pages, 387526 bytes).
Transcript written on common.log.
Segmentation fault (core dumped)
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