Ah, I got excited and only left COMPAT_FREEBSD12 in the 13 config and
remove COMPAT_FREEBSD11.
Rudy
% lldb -c routinator.core -- routinator
(lldb) thread backtrace all
* thread #1, name = 'routinator', stop reason = signal SIGSYS
* frame #0: 0x0000000801a7f50a libc.so.7`fstat at freebsd11_fstat.S:4
frame #1: 0x000000000181985f routinator`___lldb_unnamed_symbol4867 + 63
frame #2: 0x0000000001819aa5 routinator`___lldb_unnamed_symbol4872 + 21
frame #3: 0x000000000140595e routinator`___lldb_unnamed_symbol200 + 254
frame #4: 0x00000000013fa8b6 routinator`___lldb_unnamed_symbol193 + 406
frame #5: 0x00000000013f34d2 routinator`___lldb_unnamed_symbol170 + 770
frame #6: 0x00000000013f3bf3 routinator`___lldb_unnamed_symbol171 + 3
frame #7: 0x00000000013f3be9 routinator`___lldb_unnamed_symbol170 +
2585
