bug#48064: texlive-* packages fail to build non-deterministically

[Ludovic Courtès]

Hi,

Ludovic Courtès <ludo@gnu.org> skribis:

> While investigating luatex crashes in the TeX Live 2020 package of
> GNU Guix¹, we identified the following heap corruption reported by
> Valgrind (this is on GNU/Linux, with glibc 2.33):

This time with debug info for luatex:

--8<---------------cut here---------------start------------->8---
sh-5.0$  ~ludo/.guix-profile/bin/valgrind 
--extra-debuginfo-path=/gnu/store/f933bvd6ab6l2lg6xl6k1a6jwvcls0z6-glibc-2.33-debug/lib/debug
 "/gnu/store/00addvl34y6qj8k9k0bnx9jrgxqwry6q-texlive-bin-20200406/bin/luatex" 
"-interaction=nonstopmode" "-output-directory=build" "&luatex" "amsbsy.dtx"
==21562== Memcheck, a memory error detector
==21562== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==21562== Using Valgrind-3.16.1 and LibVEX; rerun with -h for copyright info
==21562== Command: 
/gnu/store/00addvl34y6qj8k9k0bnx9jrgxqwry6q-texlive-bin-20200406/bin/luatex 
-interaction=nonstopmode -output-directory=build &luatex amsbsy.dtx
==21562== 
This is LuaTeX, Version 1.12.0 (TeX Live 2020) 
 restricted system commands enabled.
==21562== Invalid write of size 8
==21562==    at 0x485C691: lua_pushlstring (lapi.c:483)
==21562==    by 0x568E03: load_hyphenation (texlang.c:306)
==21562==    by 0x56B41C: undump_one_language (texlang.c:1259)
==21562==    by 0x56B41C: undump_language_data (texlang.c:1272)
==21562==    by 0x4DFB9F: load_fmt_file (dumpdata.c:520)
==21562==    by 0x4EF0ED: main_body (mainbody.c:530)
==21562==    by 0x45118D: main (luatex.c:609)
==21562==  Address 0xac0fc30 is 0 bytes after a block of size 1,168 alloc'd
==21562==    at 0x483EBE1: realloc (in 
/gnu/store/jlmh0jbgr6zn4iyvhfbvxps8pykzj5ry-valgrind-3.16.1/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==21562==    by 0x46695D: my_luaalloc (luastuff.c:115)
==21562==    by 0x486D932: luaM_realloc_ (lmem.c:86)
==21562==    by 0x48660F2: luaD_reallocstack (ldo.c:182)
==21562==    by 0x4868BE7: traversethread (lgc.c:549)
==21562==    by 0x4868BE7: propagatemark (lgc.c:588)
==21562==    by 0x4868FCF: singlestep (lgc.c:1057)
==21562==    by 0x486988B: luaC_step (lgc.c:1137)
==21562==    by 0x485C6BB: lua_pushlstring (lapi.c:485)
==21562==    by 0x568E03: load_hyphenation (texlang.c:306)
==21562==    by 0x56B41C: undump_one_language (texlang.c:1259)
==21562==    by 0x56B41C: undump_language_data (texlang.c:1272)
==21562==    by 0x4DFB9F: load_fmt_file (dumpdata.c:520)
==21562==    by 0x4EF0ED: main_body (mainbody.c:530)
==21562== 
==21562== Invalid write of size 4
==21562==    at 0x485C6A2: lua_pushlstring (lapi.c:483)
==21562==    by 0x568E03: load_hyphenation (texlang.c:306)
==21562==    by 0x56B41C: undump_one_language (texlang.c:1259)
==21562==    by 0x56B41C: undump_language_data (texlang.c:1272)
==21562==    by 0x4DFB9F: load_fmt_file (dumpdata.c:520)
==21562==    by 0x4EF0ED: main_body (mainbody.c:530)
==21562==    by 0x45118D: main (luatex.c:609)
==21562==  Address 0xac0fc38 is 8 bytes after a block of size 1,168 alloc'd
==21562==    at 0x483EBE1: realloc (in 
/gnu/store/jlmh0jbgr6zn4iyvhfbvxps8pykzj5ry-valgrind-3.16.1/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==21562==    by 0x46695D: my_luaalloc (luastuff.c:115)
==21562==    by 0x486D932: luaM_realloc_ (lmem.c:86)
==21562==    by 0x48660F2: luaD_reallocstack (ldo.c:182)
==21562==    by 0x4868BE7: traversethread (lgc.c:549)
==21562==    by 0x4868BE7: propagatemark (lgc.c:588)
==21562==    by 0x4868FCF: singlestep (lgc.c:1057)
==21562==    by 0x486988B: luaC_step (lgc.c:1137)
==21562==    by 0x485C6BB: lua_pushlstring (lapi.c:485)
==21562==    by 0x568E03: load_hyphenation (texlang.c:306)
==21562==    by 0x56B41C: undump_one_language (texlang.c:1259)
==21562==    by 0x56B41C: undump_language_data (texlang.c:1272)
==21562==    by 0x4DFB9F: load_fmt_file (dumpdata.c:520)
==21562==    by 0x4EF0ED: main_body (mainbody.c:530)
==21562== 
==21562== Invalid read of size 16
==21562==    at 0x485D269: lua_rawset (lapi.c:809)
==21562==    by 0x568E14: load_hyphenation (texlang.c:307)
==21562==    by 0x56B41C: undump_one_language (texlang.c:1259)
==21562==    by 0x56B41C: undump_language_data (texlang.c:1272)
==21562==    by 0x4DFB9F: load_fmt_file (dumpdata.c:520)
==21562==    by 0x4EF0ED: main_body (mainbody.c:530)
==21562==    by 0x45118D: main (luatex.c:609)
==21562==  Address 0xac0fc30 is 0 bytes after a block of size 1,168 alloc'd
==21562==    at 0x483EBE1: realloc (in 
/gnu/store/jlmh0jbgr6zn4iyvhfbvxps8pykzj5ry-valgrind-3.16.1/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==21562==    by 0x46695D: my_luaalloc (luastuff.c:115)
==21562==    by 0x486D932: luaM_realloc_ (lmem.c:86)
==21562==    by 0x48660F2: luaD_reallocstack (ldo.c:182)
==21562==    by 0x4868BE7: traversethread (lgc.c:549)
==21562==    by 0x4868BE7: propagatemark (lgc.c:588)
==21562==    by 0x4868FCF: singlestep (lgc.c:1057)
==21562==    by 0x486988B: luaC_step (lgc.c:1137)
==21562==    by 0x485C6BB: lua_pushlstring (lapi.c:485)
==21562==    by 0x568E03: load_hyphenation (texlang.c:306)
==21562==    by 0x56B41C: undump_one_language (texlang.c:1259)
==21562==    by 0x56B41C: undump_language_data (texlang.c:1272)
==21562==    by 0x4DFB9F: load_fmt_file (dumpdata.c:520)
==21562==    by 0x4EF0ED: main_body (mainbody.c:530)
--8<---------------cut here---------------end--------------->8---

Ludo’.