Yet another test confirms my assumptions. I performed the exact same tests 
on a Debian 12 host
(libicu 72) and no issues at all. I will try to figure out if it could be 
fixed some way. 

Thanks for your support. I really appreciated it.

Angelo

Il giorno giovedì 7 marzo 2024 alle 13:26:51 UTC+1 in...@bnoordhuis.nl ha 
scritto:

> On Thu, Mar 7, 2024 at 12:16 PM Angelo Dell'Aera
> <angelo....@gmail.com> wrote:
> >
> > I collected a gdb backtrace and it shows something which is potentially 
> interesting
> >
> > (gdb) info stack
> > #0 0x00007ffff4d72ae6 in v8::base::OS::Abort() () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #1 0x00007ffff4d6af7c in v8::base::FatalOOM(v8::base::OOMType, char 
> const*) () from /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #2 0x00007ffff440c58c in 
> v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char 
> const*, v8::OOMDetails const&) () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #3 0x00007ffff46f998a in v8::internal::(anonymous 
> namespace)::DateTimePatternGeneratorCache::CreateGenerator(v8::internal::Isolate*,
>  
> icu_73::Locale const&) () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #4 0x00007ffff46f7e06 in 
> v8::internal::JSDateTimeFormat::CreateDateTimeFormat(v8::internal::Isolate*, 
> v8::internal::Handle<v8::internal::Map>, 
> v8::internal::Handle<v8::internal::Object>, 
> v8::internal::Handle<v8::internal::Object>, 
> v8::internal::JSDateTimeFormat::RequiredOption, 
> v8::internal::JSDateTimeFormat::DefaultsOption, char const*) () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #5 0x00007ffff46f8efa in 
> v8::internal::JSDateTimeFormat::New(v8::internal::Isolate*, 
> v8::internal::Handle<v8::internal::Map>, 
> v8::internal::Handle<v8::internal::Object>, 
> v8::internal::Handle<v8::internal::Object>, char const*) ()
> > from /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #6 0x00007ffff4dafd4e in 
> v8::internal::Builtin_DateTimeFormatConstructor(int, unsigned long*, 
> v8::internal::Isolate*) () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #7 0x00007ffff4c335b6 in Builtins_CEntry_Return1_ArgvOnStack_BuiltinExit 
> () from /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #8 0x00007ffff4b9f3fc in 
> Builtins_InterpreterPushArgsThenFastConstructFunction () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #9 0x00002136d010c8f9 in ?? ()
> > #10 0x00002136d010c8f9 in ?? ()
> > #11 0x0000000500000000 in ?? ()
> > #12 0x000027e541540c19 in ?? ()
> > #13 0x000027e541540c19 in ?? ()
> > #14 0x000027e541540c19 in ?? ()
> > #15 0x00001bbc90f9d349 in ?? ()
> > #16 0x0000000000000030 in ?? ()
> > #17 0x00007fffffff7940 in ?? ()
> > #18 0x00007ffff4d2736c in Builtins_ConstructHandler () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > #19 0x0000207ba8729fe1 in ?? ()
> > #20 0x00001bbc90fb50b9 in ?? ()
> > #21 0x000027e541540061 in ?? ()
> > #22 0xfffffffffffffffe in ?? ()
> > #23 0x00007ffff4d1b0a0 in Builtins_SetNamedPropertyHandler () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> > Backtrace stopped: previous frame inner to this frame (corrupt stack?)
> >
> > As we can see from #3
> >
> > #3 0x00007ffff46f998a in v8::internal::(anonymous 
> namespace)::DateTimePatternGeneratorCache::CreateGenerator(v8::internal::Isolate*,
>  
> icu_73::Locale const&) () from 
> /home/angelo/.local/lib/python3.9/site-packages/_
> STPyV8.cpython-39-x86_64-linux-gnu.so
> >
> > the CreatePattern second parameter type is supposed to be icu_73::Local.
> >
> > As I mentioned in a previous email, Debian 11 is the only environment 
> that allows me to reproduce the issue reliably while the
> > issue is not present in all the other environments. So I checked the 
> system libicu version and realized that libicu 67 is installed
> > on Debian 11 and libicu 74 is installed on all the other systems.
> >
> > During the build workflow, I statically link libv8_monolith to STPyV8 so 
> I don't really expect but if V8 ends up using the system
> > libicu (because I do not link statically the third party library too? is 
> it really required?) and that libicu 73 API is not compatible
> > with the libicu 67 one that could explain what I am observing.
> >
> > Angelo
>
> I think you've found the cause. (I had a hunch it was conflicting
> symbols/libraries, hence my suggestion of turning on
> use_custom_libcxx.)
>
> It's possible something else also loads (or exports a copy of) ICU and
> makes you end up with the wrong version when the dynamic linker does
> runtime linking.
>

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