Ah, OK, here it is:
(gdb) backtrace
#0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=140736797179072)
at ./nptl/pthread_kill.c:44
#1 __pthread_kill_internal (signo=6, threadid=140736797179072)
at ./nptl/pthread_kill.c:78
#2 __GI___pthread_kill (threadid=140736797179072, signo=signo@entry=6)
at ./nptl/pthread_kill.c:89
#3 0x00007ffff7c42476 in __GI_raise (sig=sig@entry=6)
at ../sysdeps/posix/raise.c:26
#4 0x00007ffff7c287f3 in __GI_abort () at ./stdlib/abort.c:79
#5 0x00007ffff7c89676 in __libc_message (action=action@entry=do_abort,
fmt=fmt@entry=0x7ffff7ddbb77 "%s\n") at ../sysdeps/posix/libc_fatal.c:155
#6 0x00007ffff7ca0cfc in malloc_printerr (
str=str@entry=0x7ffff7ddebc0 "malloc(): invalid size (unsorted)")
at ./malloc/malloc.c:5664
#7 0x00007ffff7ca40dc in _int_malloc (
av=av@entry=0x7ffff7e19c80 <main_arena>, bytes=bytes@entry=41)
at ./malloc/malloc.c:4002
#8 0x00007ffff7ca5139 in __GI___libc_malloc (bytes=41)
at ./malloc/malloc.c:3329
#9 0x00007fffef2ae98c in operator new(unsigned long) ()
from /lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007fffef2f4979 in std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&) () from /lib/x86_64-linux-gnu/libstdc++.so.6
--Type <RET> for more, q to quit, c to continue without paging--c
#11 0x00007ffff08e6a46 in vtkInformationKey::vtkInformationKey(char const*, char const*) () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libvtkCommonCore-pv5.12.so.1
#12 0x00007ffff08e3f8f in vtkInformationIntegerKey::vtkInformationIntegerKey(char const*, char const*) () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libvtkCommonCore-pv5.12.so.1
#13 0x00007fffc94da006 in _GLOBAL__sub_I_vtkAbstractArray.cxx () from /opt/paraviewopenfoam56/lib/libvtkCommonCore-pv5.6.so.1
#14 0x00007ffff7fc947e in call_init (l=<optimised out>, argc=argc@entry=1, argv=argv@entry=0x7fffffffcfb8, env=env@entry=0x4cc2c0) at ./elf/dl-init.c:70
#15 0x00007ffff7fc9568 in call_init (env=0x4cc2c0, argv=0x7fffffffcfb8, argc=1, l=<optimised out>) at ./elf/dl-init.c:33
#16 _dl_init (main_map=0x8b58a0, argc=1, argv=0x7fffffffcfb8, env=0x4cc2c0) at ./elf/dl-init.c:117
#17 0x00007ffff7d74905 in __GI__dl_catch_exception (exception=<optimised out>, operate=<optimised out>, args=<optimised out>) at ./elf/dl-error-skeleton.c:182
#18 0x00007ffff7fd0ff6 in dl_open_worker (a=0x7fffffffc3e0) at ./elf/dl-open.c:808
#19 dl_open_worker (a=a@entry=0x7fffffffc3e0) at ./elf/dl-open.c:771
#20 0x00007ffff7d748a8 in __GI__dl_catch_exception (exception=<optimised out>, operate=<optimised out>, args=<optimised out>) at ./elf/dl-error-skeleton.c:208
#21 0x00007ffff7fd134e in _dl_open (file=<optimised out>, mode=-2147483391, caller_dlopen=0x7ffff08b87d5 <vtkDynamicLoader::OpenLibrary(char const*, int)+117>, nsid=-2, argc=1, argv=<optimised out>, env=0x4cc2c0) at ./elf/dl-open.c:883
#22 0x00007ffff7c9063c in dlopen_doit (a=a@entry=0x7fffffffc650) at ./dlfcn/dlopen.c:56
#23 0x00007ffff7d748a8 in __GI__dl_catch_exception (exception=exception@entry=0x7fffffffc5b0, operate=<optimised out>, args=<optimised out>) at ./elf/dl-error-skeleton.c:208
#24 0x00007ffff7d74973 in __GI__dl_catch_error (objname=0x7fffffffc608, errstring=0x7fffffffc610, mallocedp=0x7fffffffc607, operate=<optimised out>, args=<optimised out>) at ./elf/dl-error-skeleton.c:227
#25 0x00007ffff7c9012e in _dlerror_run (operate=operate@entry=0x7ffff7c905e0 <dlopen_doit>, args=args@entry=0x7fffffffc650) at ./dlfcn/dlerror.c:138
#26 0x00007ffff7c906c8 in dlopen_implementation (dl_caller=<optimised out>, mode=<optimised out>, file=<optimised out>) at ./dlfcn/dlopen.c:71
#27 ___dlopen (file=<optimised out>, mode=<optimised out>) at ./dlfcn/dlopen.c:81
#28 0x00007ffff08b87d5 in vtkDynamicLoader::OpenLibrary(char const*, int) () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libvtkCommonCore-pv5.12.so.1
#29 0x00007ffff6f9a6fa in vtkPVPluginLoader::LoadPluginInternal(char const*, bool) () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libvtkRemotingCore-pv5.12.so.1
#30 0x00007ffff6f9c322 in vtkPVPluginLoader::LoadPluginsFromPath(char const*) () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libvtkRemotingCore-pv5.12.so.1
#31 0x00007ffff6f9c894 in vtkPVPluginLoader::LoadPluginsFromPluginSearchPath() () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libvtkRemotingCore-pv5.12.so.1
#32 0x00007fffedd2c236 in vtkInitializationHelper::InitializeMiscellaneous(int) () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libvtkRemotingApplication-pv5.12.so.1
#33 0x00007ffff66b3708 in pqApplicationCore::pqApplicationCore(int&, char**, vtkCLIOptions*, bool, QObject*) () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libpqCore-pv5.12.so.1
#34 0x00007ffff79d917a in pqPVApplicationCore::pqPVApplicationCore(int&, char**, vtkCLIOptions*, bool, QObject*) () from /home/timbo/software/ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64/bin/../lib/libpqApplicationComponents-pv5.12.so.1
#35 0x000000000040eacb in pqparaviewInitializer::Initialize(int, char**) ()
#36 0x00000000004093c8 in main ()