bird 3.2.0 crashes after adding ASPA and running "configure"

[Christoph]

Hello again,

I managed to get it to crash also on 3.2.0 without the "-R" so,
this might be two instead of just one issue.
Without "-R" at least it crashes only once and not in a loop.

The last log line in the trace level log before the crash:
2026-01-05 15:56:04.980 [0002] <BUG> Assertion 'r->cur' failed at 
lib/lockfree.c:229


coredumpctl output:
            PID: 400061 (bird)
            UID: 103 (bird)
            GID: 105 (bird)
         Signal: 6 (ABRT)
      Timestamp: Mon 2026-01-05 15:56:05 CET (8min ago)
   Command Line: /usr/sbin/bird -f -u bird -g bird
     Executable: /usr/sbin/bird
  Control Group: /system.slice/bird.service
           Unit: bird.service
          Slice: system.slice
        Storage: 
/var/lib/systemd/coredump/core.bird.103.bca60f28d7ae4991a019cc2291fdaeee.400061.1767624965000000.zst 
(present)
   Size on Disk: 153.1M
        Message: Process 400061 (bird) of user 103 dumped core.

                 Module libzstd.so.1 from deb libzstd-1.5.7+dfsg-1.amd64
                 Stack trace of thread 400070:
                 #0  0x00007fcc476e295c n/a (libc.so.6 + 0x9495c)
                 #1  0x00007fcc4768dcc2 raise (libc.so.6 + 0x3fcc2)
                 #2  0x00007fcc476764ac abort (libc.so.6 + 0x284ac)
                 #3  0x0000557e4b9e84dc n/a (/usr/sbin/bird + 0x10f4dc)
                 #4  0x0000557e4b9369ba n/a (/usr/sbin/bird + 0x5d9ba)
                 #5  0x0000557e4b94f52b n/a (/usr/sbin/bird + 0x7652b)
                 #6  0x0000557e4b95f911 n/a (/usr/sbin/bird + 0x86911)
                 #7  0x0000557e4b94f95a n/a (/usr/sbin/bird + 0x7695a)
                 #8  0x0000557e4b932956 n/a (/usr/sbin/bird + 0x59956)
                 #9  0x0000557e4b9e581f n/a (/usr/sbin/bird + 0x10c81f)
                 #10 0x0000557e4b932956 n/a (/usr/sbin/bird + 0x59956)
                 #11 0x0000557e4b9e3692 n/a (/usr/sbin/bird + 0x10a692)
                 #12 0x00007fcc476e0b7b n/a (libc.so.6 + 0x92b7b)
                 #13 0x00007fcc4775e7b8 n/a (libc.so.6 + 0x1107b8)

                 Stack trace of thread 400061:
                 #0  0x00007fcc476e89ee n/a (libc.so.6 + 0x9a9ee)
                 #1  0x00007fcc476dd668 n/a (libc.so.6 + 0x8f668)
                 #2  0x00007fcc476dd6ad n/a (libc.so.6 + 0x8f6ad)
                 #3  0x00007fcc477519c6 __poll (libc.so.6 + 0x1039c6)
                 #4  0x0000557e4b9de02f n/a (/usr/sbin/bird + 0x10502f)
                 #5  0x0000557e4b8ee3de n/a (/usr/sbin/bird + 0x153de)
                 #6  0x00007fcc47677ca8 n/a (libc.so.6 + 0x29ca8)
                 #7  0x00007fcc47677d65 __libc_start_main (libc.so.6 + 
0x29d65)
                 #8  0x0000557e4b8ee671 n/a (/usr/sbin/bird + 0x15671)
                 ELF object binary architecture: AMD x86-64


version:
bird3          3.2.0-cznic.1~trixie amd64

best regards,
Christoph

config diff for enabing ASPA:

-------------
diff --git a/filter.conf b/filter.conf
index ecd825d..c349eaa 100644
--- a/filter.conf
+++ b/filter.conf
@@ -23,6 +23,12 @@ filter transit_in {
                 }
         }

+       # Log ASPA_INVALIDs
+       if (aspa_check_downstream(at) = ASPA_INVALID) then
+       {
+               print "ASPA INVALID announcement (monitoring only): ", 
net, " AS path: ", bgp_path;
+       }
+
          accept;

  }
diff --git a/rpki.conf b/rpki.conf
index 26335ba..8414266 100644
--- a/rpki.conf
+++ b/rpki.conf
@@ -2,6 +2,7 @@

  roa4 table r4;
  roa6 table r6;
+aspa table at;


  protocol rpki r3k {
@@ -9,6 +10,7 @@ protocol rpki r3k {

          roa4 { table r4; };
          roa6 { table r6; };
+       aspa { table at; };
---------------