core dump in jsService

dmsg says

[Fri Sep 29 16:05:47 2023] sbbs/jsService[3074347]: segfault at 7fc5406e8a1c ip 00007fc5406e8a1c sp 00007fc58cff2b70 error 14
[Fri Sep 29 16:05:47 2023] Code: Unable to access opcode bytes at RIP 0x7fc5406e89f2.

Here's the bt.

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
--Type <RET> for more, q to quit, c to continue without paging--c
Core was generated by `/sbbs/exec/sbbs d'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fc5406e8a1c in ?? ()
[Current thread is 1 (Thread 0x7fc58cff9640 (LWP 3074347))]
(gdb) bt
#0  0x00007fc5406e8a1c in ?? ()
#1  0x00007fc58cff2d30 in ?? ()
#2  0x00007fc64f36786f in js::ExecuteTrace (state=...,
    f=0x7fc64f3602d8 <js::BuildNativeFrame(JSContext*, JSObject*, unsigned int, unsigned int, uint16*, JSValueType*, double*, double*)+486>,
    tm=0x7fc58cff2b60, cx=0x7fc5afd03048) at jstracer.cpp:6568
#3  js::ExecuteTree (cx=0x7fc5c48d88f8, tm=0x7fc58bbf81f0, f=0x7fc58bbf8200, inlineCallCount=@0x7fc58cff2cd0: 2365533772,
    innermostNestedGuardp=0x7fc5c49cb3e8, lrp=0x7fc5c70051b8) at jstracer.cpp:6674
Backtrace stopped: frame did not save the PC
(gdb) bt full
#0  0x00007fc5406e8a1c in ?? ()
No symbol table info available.
#1  0x00007fc58cff2d30 in ?? ()
No symbol table info available.
#2  0x00007fc64f36786f in js::ExecuteTrace (state=...,
    f=0x7fc64f3602d8 <js::BuildNativeFrame(JSContext*, JSObject*, unsigned int, unsigned int, uint16*, JSValueType*, double*, double*)+486>,
    tm=0x7fc58cff2b60, cx=0x7fc5afd03048) at jstracer.cpp:6568
        u = {code = 0x7fc5c487e058 "\230'ү\305\377\373\377\200\003ү\305\377\373\377", func = 0x7fc5c487e058}
        rec = 0x7fc58cff2a90
#3  js::ExecuteTree (cx=0x7fc5c48d88f8, tm=0x7fc58bbf81f0, f=0x7fc58bbf8200, inlineCallCount=@0x7fc58cff2cd0: 2365533772,
    innermostNestedGuardp=0x7fc5c49cb3e8, lrp=0x7fc5c70051b8) at jstracer.cpp:6674
        state = {cx = 0x7fc5afd03048, traceMonitor = 0x7fc5c484a860, stackBase = 0x7fc58cff2ad0, sp = 0x400000000, eos = 0x400000000,
          callstackBase = 0x15300000004, sor = 0x15300000003, rp = 0x7fc5c484a860, eor = 0x7fc5afd03048, lastTreeExitGuard = 0x7fc5c40e3830,
          lastTreeCallGuard = 0x7fc58cff2b30, rpAtLastTreeCall = 0x7fc5c484a860, outermostTreeExitGuard = 0x7fc58cff2b30,
          outermostTree = 0x7fc5c484a860, inlineCallCountp = 0x7fc5afd03048, innermostNestedGuardp = 0x7fc5c40e3830, innermost = 0x7fc58cff2b30,
          startTime = 140487382523992, prev = 0x7fc5ae0245d8, builtinStatus = 3299478497, deepBailSp = 0x7fc58bff8000, nativeVpLen = 2365533280,
          nativeVp = 0x7fc58bbf8258}
        stack = 0x7fc58bbf8208
        global = 0xfffbffc5afd22798
        globalObj = 0x7fc5c487e058
        ngslots = 32599
        gslots = 0x7fc5c48d88f8
        lr = 0x7fc5c48d88f8
        ok = 79
        iters = 140487382529024
Backtrace stopped: frame did not save the PC
(gdb)