brltty crashed with SIGSEGV in asyncDiscardEvent()

[corrado venturini]

this problem occurs recurring on every boot

ProblemType: Crash
DistroRelease: Ubuntu 22.10
Package: brltty 6.4-6ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
Uname: Linux 5.15.0-27-generic x86_64
ApportVersion: 2.21.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CrashCounter: 1
Date: Tue Jun 14 06:24:44 2022
ExecutablePath: /usr/bin/brltty
InstallationDate: Installed on 2022-05-14 (30 days ago)
InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Alpha amd64 (20220512)
ProcCmdline: /bin/brltty --no-daemon
SegvAnalysis:
 Segfault happened at: 0x5642f400ee48 <runSpeechDriverThread+152>: mov 0x20(%rbp),%rdi
 PC (0x5642f400ee48) ok
 source "0x20(%rbp)" (0x00000020) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: brltty
StacktraceTop:
 runSpeechDriverThread ()
 ?? ()
 start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442
 clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
Title: brltty crashed with SIGSEGV in runSpeechDriverThread()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
separator:

[Apport retracing service (apport)]

StacktraceTop:
 asyncDiscardEvent (event=0x0) at ../../Programs/async_event.c:147
 runSpeechDriverThread (argument=0x5642f4c2b890) at ../../Programs/spk_thread.c:842
 runThread (argument=0x5642f4c2bb80) at ../../Programs/thread.c:46
 start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442
 clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Apport retracing service (apport)]

StacktraceTop:
 asyncDiscardEvent (event=0x0) at ../../Programs/async_event.c:147
 runSpeechDriverThread (argument=0x5642f4c2b890) at ../../Programs/spk_thread.c:842
 runThread (argument=0x5642f4c2bb80) at ../../Programs/thread.c:46
 start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442
 clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

[corrado venturini (corradoventu)]

brltty crash at each boot also with different symptoms.Today the message is:
brltty crashed with SIGSEGV in runSpeechDriverThread()