Wireshark 3.1 freeze under macOS Catalina

edit

When starting Wireshark 3.1, I see one process forks five others and those five run at 100% CPU (per top). On the UI, Wireshark is stuck at "Initializing external capture plugins".

What information can I gather to help troubleshoot this?

Some debug info:

Sampling process 28323 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling Wireshark (pid 28323) every 1 millisecond
Process:         Wireshark [28323]
Path:            /Applications/Wireshark.app/Contents/MacOS/Wireshark
Load Address:    0x10a6ca000
Identifier:      Wireshark
Version:         ???
Code Type:       X86-64
Parent Process:  Wireshark [28319]

Date/Time:       2019-11-11 09:44:24.467 -0800
Launch Time:     2019-11-11 09:43:19.488 -0800
OS Version:      Mac OS X 10.15.1 (19B88)
Report Version:  7
Analysis Tool:   /usr/bin/sample

Physical footprint:         436K
Physical footprint (peak):  436K
----

Call graph:
    2789 Thread_2686105: Main Thread   DispatchQueue_<multiple>
      2789 thread_start  (in libsystem_pthread.dylib) + 15  [0x7fff650a858f]
        2789 _pthread_start  (in libsystem_pthread.dylib) + 125  [0x7fff650abd36]
          2789 g_thread_proxy  (in libglib-2.0.0.dylib) + 90  [0x111d328ca]  gthread.c:798
            2789 g_thread_pool_thread_proxy  (in libglib-2.0.0.dylib) + 50  [0x111d33892]  gthreadpool.c:309
              2789 extcap_thread_callback  (in Wireshark) + 62  [0x10aa2327e]
                2789 ws_pipe_spawn_sync  (in libwsutil.0.dylib) + 268  [0x111a2a4ac]  ws_pipe.c:482
                  2789 g_spawn_sync  (in libglib-2.0.0.dylib) + 275  [0x111d53bc3]  gspawn.c:281
                    2789 fork_exec_with_pipes  (in libglib-2.0.0.dylib) + 2305  [0x111d54911]  gspawn.c:0
                      2750 do_exec  (in libglib-2.0.0.dylib) + 154  [0x111d5505a]  gspawn.c:1161
                      + 2669 fcntl  (in libsystem_kernel.dylib) + 171  [0x7fff64fe9a88]
                      + ! 2611 __fcntl  (in libsystem_kernel.dylib) + 10,12,...  [0x7fff64fe9ace,0x7fff64fe9ad0,...]
                      + ! 27 cerror  (in libsystem_kernel.dylib) + 13  [0x7fff64fe838e]
                      + ! : 21 _pthread_exit_if_canceled  (in libsystem_pthread.dylib) + 0,5  [0x7fff650a6d34,0x7fff650a6d39]
                      + ! : 6 _pthread_exit_if_canceled  (in libsystem_kernel.dylib) + 10,7  [0x7fff64fe83b4,0x7fff64fe83b1]
                      + ! 26 cerror  (in libsystem_kernel.dylib) + 1,5,...  [0x7fff64fe8382,0x7fff64fe8386,...]
                      + ! 5 cerror  (in libsystem_kernel.dylib) + 20  [0x7fff64fe8395]
                      + !   5 cerror_nocancel  (in libsystem_kernel.dylib) + 0,22,...  [0x7fff64fe83b7,0x7fff64fe83cd,...]
                      + 81 fcntl  (in libsystem_kernel.dylib) + 171,178,...  [0x7fff64fe9a88,0x7fff64fe9a8f,...]
                      36 do_exec  (in libglib-2.0.0.dylib) + 154,157,...  [0x111d5505a,0x111d5505d,...]  gspawn.c:1161
                      3 DYLD-STUB$$fcntl  (in libglib-2.0.0.dylib) + 0  [0x111d7ed3a]

Total number in stack (recursive counted multiple, when >=5):

Sort by top of stack, same collapsed (when >= 5):
        __fcntl  (in libsystem_kernel.dylib)        2611
        fcntl  (in libsystem_kernel.dylib)        81
        do_exec  (in libglib-2.0.0.dylib)        36
        cerror  (in libsystem_kernel.dylib)        26
        _pthread_exit_if_canceled  (in libsystem_pthread.dylib)        21
        _pthread_exit_if_canceled  (in libsystem_kernel.dylib)        6
        cerror_nocancel  (in libsystem_kernel.dylib)        5