Here's one of the new coredumps I'm getting at boot now. Note that I don't have debugging symbols installed for the PPA version of systemd.
# coredumpctl gdb 714
PID: 714 (systemd-network)
UID: 100 (systemd-network)
GID: 102 (systemd-network)
Signal: 11 (SEGV)
Timestamp: Wed 2020-07-08 17:17:01 UTC (8min ago)
Command Line: /lib/systemd/systemd-networkd
Executable: /lib/systemd/systemd-networkd
Control Group: /system.slice/systemd-networkd.service
Unit: systemd-networkd.service
Slice: system.slice
Boot ID: df33bbaec4134b45aaabe8b3fca7dade
Machine ID: ec267b3475883f9edb99f554607bb456
Hostname: ip-10-0-4-251
Storage: /var/lib/systemd/coredump/core.systemd-network.100.df33bbaec4134b45aaabe8b3fca7dade.714.1594228621000000.lz4
Message: Process 714 (systemd-network) of user 100 dumped core.
Here's one of the new coredumps I'm getting at boot now. Note that I don't have debugging symbols installed for the PPA version of systemd. systemd- networkd systemd- networkd slice/systemd- networkd. service networkd. service 5aaabe8b3fca7da de edb99f554607bb4 56 systemd/ coredump/ core.systemd- network. 100.df33bbaec41 34b45aaabe8b3fc a7dade. 714.15942286210 00000.lz4
# coredumpctl gdb 714
PID: 714 (systemd-network)
UID: 100 (systemd-network)
GID: 102 (systemd-network)
Signal: 11 (SEGV)
Timestamp: Wed 2020-07-08 17:17:01 UTC (8min ago)
Command Line: /lib/systemd/
Executable: /lib/systemd/
Control Group: /system.
Unit: systemd-
Slice: system.slice
Boot ID: df33bbaec4134b4
Machine ID: ec267b3475883f9
Hostname: ip-10-0-4-251
Storage: /var/lib/
Message: Process 714 (systemd-network) of user 100 dumped core.
#0 0x00005627a7f3425c n/a (systemd-networkd)
#1 0x00005627a7fb5760 n/a (systemd-networkd)
#2 0x00005627a7f26526 sd_netlink_process (systemd-networkd)
#3 0x00005627a7f267c3 n/a (systemd-networkd)
#4 0x00005627a7f2b6be n/a (systemd-networkd)
#5 0x00005627a7f2b93a sd_event_dispatch (systemd-networkd)
#6 0x00005627a7f2bac9 sd_event_run (systemd-networkd)
#7 0x00005627a7f2bd0b sd_event_loop (systemd-networkd)
#8 0x00005627a7eff3d6 n/a (systemd-networkd)
#9 0x00007f6d90500b97 __libc_start_main (libc.so.6)
#10 0x00005627a7effaba n/a (systemd-networkd)