named crash in interfacemgr.c if killed while creating interfaces
And if you wait a bit more longer and press Ctrl-C:
^C21-Apr-2021 20:49:34.063 listening on IPv4 interface lo, 10.53.2.2#12345
21-Apr-2021 20:49:34.063 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.063 creating IPv4 interface lo failed; interface ignored
21-Apr-2021 20:49:34.079 listening on IPv4 interface eno1, 10.10.10.20#12345
21-Apr-2021 20:49:34.079 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.079 creating IPv4 interface eno1 failed; interface ignored
21-Apr-2021 20:49:34.079 listening on IPv4 interface docker0, 172.17.0.1#12345
21-Apr-2021 20:49:34.079 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.079 creating IPv4 interface docker0 failed; interface ignored
21-Apr-2021 20:49:34.079 IPv6 socket API is incomplete; explicitly binding to each IPv6 address separately
21-Apr-2021 20:49:34.079 listening on IPv6 interface lo, fd92:7065:b8e:ff::2#12345
21-Apr-2021 20:49:34.079 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.079 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.083 listening on IPv6 interface lo, fd92:7065:b8e:ff::1#12345
21-Apr-2021 20:49:34.083 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.083 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.083 listening on IPv6 interface lo, fd92:7065:b8e:99ff::2#12345
21-Apr-2021 20:49:34.083 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.083 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.083 listening on IPv6 interface lo, fd92:7065:b8e:99ff::1#12345
21-Apr-2021 20:49:34.083 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::10#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::9#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::8#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::7#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::6#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::5#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::4#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::3#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::2#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, fd92:7065:b8e:ffff::1#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface lo, ::1#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface lo failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface eno1, fe80::56b2:3ff:fe08:4718%2#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface eno1 failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface docker0, 2001:db8:1::1#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface docker0 failed; interface ignored
21-Apr-2021 20:49:34.087 listening on IPv6 interface docker0, fe80::1%4#12345
21-Apr-2021 20:49:34.087 ns_clientmgr_create() failed: not found
21-Apr-2021 20:49:34.087 creating IPv6 interface docker0 failed; interface ignored
21-Apr-2021 20:49:34.091 interfacemgr.c:768: INSIST((__builtin_expect(!!((ifp) != ((void*)0)), 1) && __builtin_expect(!!(((const isc__magic_t *)(ifp))->magic == ((('I') << 24 | (':') << 16 | ('-') << 8 | (')')))), 1))) failed, back trace
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/isc/.libs/libisc-9.17.11.so(isc_backtrace_gettrace+0x37) [0x7fb6366e6e87]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/bin/named/.libs/named() [0x4dbfdc]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/isc/.libs/libisc-9.17.11.so(isc_assertion_failed+0x3e) [0x7fb6366e686e]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/ns/.libs/libns-9.17.11.so(+0x187dd) [0x7fb6363857dd]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/ns/.libs/libns-9.17.11.so(+0x1a009) [0x7fb636387009]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/ns/.libs/libns-9.17.11.so(ns_interfacemgr_scan+0x3f) [0x7fb636385d2f]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/bin/named/.libs/named() [0x4eff99]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/bin/named/.libs/named() [0x4de290]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/isc/.libs/libisc-9.17.11.so(isc_task_run+0x266) [0x7fb6367117c6]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/isc/.libs/libisc-9.17.11.so(+0x344ee) [0x7fb6366b44ee]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/isc/.libs/libisc-9.17.11.so(+0x2e4e3) [0x7fb6366ae4e3]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/isc/.libs/libisc-9.17.11.so(+0x28d28) [0x7fb6366a8d28]
21-Apr-2021 20:49:34.091 /home/ondrej/.tsan/lib/libuv.so.1(+0x1538a) [0x7fb635cd938a]
21-Apr-2021 20:49:34.091 /home/ondrej/.tsan/lib/libuv.so.1(uv__io_poll+0x687) [0x7fb635cf2bb7]
21-Apr-2021 20:49:34.091 /home/ondrej/.tsan/lib/libuv.so.1(uv_run+0xcd) [0x7fb635cd99ad]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/isc/.libs/libisc-9.17.11.so(+0x28eae) [0x7fb6366a8eae]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/lib/isc/.libs/libisc-9.17.11.so(isc__trampoline_run+0xad) [0x7fb63671715d]
21-Apr-2021 20:49:34.091 /home/ondrej/Projects/bind9/bin/named/.libs/named() [0x43e18d]
21-Apr-2021 20:49:34.091 /lib/x86_64-linux-gnu/libpthread.so.0(+0x8ea7) [0x7fb635a97ea7]
21-Apr-2021 20:49:34.091 /lib/x86_64-linux-gnu/libc.so.6(clone+0x3f) [0x7fb63585ddef]
21-Apr-2021 20:49:34.091 exiting (due to assertion failure)