On 7/29/2020 6:22 AM, Marcel Fabian Krüger wrote:
Hi,
starting with LuaMetaTeX 2.07.01, a C library I load from Lua started to
segfault and valgrind indicates that it accesses invalid memory in
multiple places in the middle of Lua internal functions?!
The whole thing looks almost like the Lua versions in LuaMetaTeX and in
the library are incompatible, but both seem to use 5.4.0. So I asked
myself if there might be changes not reflected by the version number.
tl;dr: Has the embedded Lua interpreter changed in some non ABI-compatible
way in LuaMetaTeX 2.07.01? (Especially on Linux, x86-64. I didn't test
other platforms yet)
there have been a couple of bug fixes after the formal 5.4.0 release but
afaik not in the virtual machine code (which normally is the most
sensitive); i used to mark low level changes so that it got signaled (in
context) but the byte code version info changed late in 5.4 dev so i no
longer do that now
although i occasionally have run into buglets in 5.4 code - which to me
is quite natural as it concerns dev / exp versions so one gets what one
downloads, i.e. one can only blame oneself for using such versions and
hardly complain - lua is quite stable and reliable (given the massive
amount of lua code that we use in context) ... so, normally patience -
read: wait for updates - is the answer
Hans
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