Hi, after upgrading from Bird 3.1.4 to 3.2.0 (EPEL RPM package) bird is crashing shortly after starting it with the following error Assertion 'DG_IS_LOCKED(orig->domain)' failed at lib/resource.c:208 The issue was reported back in january on this list (https://bird.network.cz/pipermail/bird-users/2026-January/018551.html) but there was no real follow-up. We confirm the behaviour - bird crashes shortly after processing the first BGP requests and generates he following core-dump Stack trace of thread 6573: #0 0x00007f191f08d02c __pthread_kill_implementation (libc.so.6 + 0x8d02c) #1 0x00007f191f03fb86 raise (libc.so.6 + 0x3fb86) #2 0x00007f191f029873 abort (libc.so.6 + 0x29873) #3 0x0000559400a21d5f bug (bird + 0xe9d5f) #4 0x0000559400978bd7 rmove (bird + 0x40bd7) #5 0x00005594009d3809 bgp_start.lto_priv.0 (bird + 0x9b809) #6 0x000055940098b48e proto_rethink_goal.lto_priv.0 (bird + 0x5348e) #7 0x000055940097611e defer_execute (bird + 0x3e11e) #8 0x0000559400972323 ev_run_list_limited (bird + 0x3a323) #9 0x0000559400950556 main (bird + 0x18556) #10 0x00007f191f02a610 __libc_start_call_main (libc.so.6 + 0x2a610) #11 0x00007f191f02a6c0 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x2a6c0) #12 0x0000559400950c75 _start (bird + 0x18c75) Stack trace of thread 6574: #0 0x00007f191f088540 __GI___lll_lock_wait (libc.so.6 + 0x88540) #1 0x00007f191f08e6d2 __pthread_mutex_lock@GLIBC_2.2.5<mailto:__pthread_mutex_lock@GLIBC_2.2.5> (libc.so.6 + 0x8e6d2) #2 0x0000559400a22a92 do_lock (bird + 0xeaa92) #3 0x0000559400a1c0e0 bird_thread_main (bird + 0xe40e0) #4 0x00007f191f08b2ea start_thread (libc.so.6 + 0x8b2ea) #5 0x00007f191f1103d0 __clone3 (libc.so.6 + 0x1103d0) Stack trace of thread 6575: #0 0x00007f191f1030cf __poll (libc.so.6 + 0x1030cf) #1 0x0000559400a1c436 bird_thread_main (bird + 0xe4436) #2 0x00007f191f08b2ea start_thread (libc.so.6 + 0x8b2ea) #3 0x00007f191f1103d0 __clone3 (libc.so.6 + 0x1103d0) ELF object binary architecture: AMD x86-64 We reverted to Bird 3.1.5 - no issues here. The issue occurs with the following configuration (slightly anonymized) Bird.conf # Configure logging log syslog all; # Include constants include "/etc/bird/constants.conf"; router id rs_ipv4; protocol bfd BFD_DCFABRIC { multihop { interval 300 ms; multiplier 3; }; } protocol direct { disabled; # Disable by default ipv4; # Connect to default IPv4 table ipv6; # ... and to default IPv6 table } protocol kernel { ipv4 { }; } protocol kernel { ipv6 { }; } protocol static { disabled; ipv4; # Again, IPv4 channel with default options } include "/etc/bird/rs-peerings.conf"; constants.conf define rs_ipv4 = x.y.y.z; rs-peerings.conf # FILTER filter only_serviceips { if net ~ [ 192.168.20.0/24{32,32} ] then accept; if net ~ [ 10.127.64.0/19{32,32} ] then accept; reject; } # HOSTS template bgp SERVICENODE { local as 4200010004; ipv4 { import filter only_serviceips; export none; }; rs client; hold time 6; multihop 10; bfd on; source address rs_ipv4; } protocol bgp rack_XYZ from SERVICENODE { neighbor range 192.168.y.y/26 as 4200010003; dynamic name "rack_XYZ_"; } template bgp DCFABRIC { ipv4 { import none; export all; add paths tx; }; local as 4200010004; rs client; multihop 10; bfd on; source address rs_ipv4; } # DC-Fabric nodes protocol bgp R_DCI_01 from DCFABRIC { neighbor x.x.x.x as 4200001201; }