monero-lws bus error upon reorg

[Lederstrumpf]

system: ubuntu:20.04

monero-lws version: https://github.com/TheCharlatan/monero-lws/tree/changes
That's lagging current HEAD on develop by 2 commits which do not appear to address this issue.

monerod version: v0.17.2.3

relevant monero-lws log snippet:

2022-06-03 09:35:51.925 I Processed 1 block(s) against 304 account(s)
2022-06-03 09:35:51.945 I Processed 1 block(s) against 304 account(s)
2022-06-03 09:35:58.416 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:36:25.118 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:36:41.610 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:36:50.662 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:37:14.878 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:37:16.232 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:37:42.398 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:37:47.808 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:38:10.321 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:38:14.779 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:38:38.390 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:38:38.535 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:39:04.856 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:39:06.338 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:39:30.512 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:39:35.687 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:39:54.823 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:40:22.608 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:40:50.154 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:40:50.917 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:40:52.475 I Processed 1 block(s) against 304 account(s)
2022-06-03 09:40:52.483 I Processed 1 block(s) against 304 account(s)
2022-06-03 09:41:19.026 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:41:46.817 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:42:15.723 I Processed 999 block(s) against 305 account(s)
2022-06-03 09:42:23.452 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:42:52.619 I Processed 1 block(s) against 304 account(s)
2022-06-03 09:42:52.662 I Processed 1 block(s) against 304 account(s)
2022-06-03 09:42:55.891 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:43:12.686 I Processed 2 block(s) against 304 account(s)
2022-06-03 09:43:12.733 I Processed 2 block(s) against 304 account(s)
2022-06-03 09:43:25.526 I Processed 999 block(s) against 304 account(s)
2022-06-03 09:43:30.787 I Processed 999 block(s) against 305 account(s)
Bus error (core dumped)

relevant monerod log snippet:

2022-06-03 05:53:11.039 W No incoming connections - check firewalls/routers allow port 38080
2022-06-03 06:53:25.802 W No incoming connections - check firewalls/routers allow port 38080
2022-06-03 07:53:47.139 W No incoming connections - check firewalls/routers allow port 38080
2022-06-03 08:54:04.482 W No incoming connections - check firewalls/routers allow port 38080
2022-06-03 09:42:57.604 I ----- BLOCK ADDED AS ALTERNATIVE ON HEIGHT 1105940
2022-06-03 09:42:57.605 I id:   <6df4fc526e5ead606d9e8484109a280dd99e3564856c3012af15f710753e5409>
2022-06-03 09:42:57.605 I PoW:  <00383dfce285466081535e0d5d4b59af2cae5c00d3da095205ce7a4fa10a0000>
2022-06-03 09:42:57.605 I difficulty:   224824
2022-06-03 09:43:48.863 I ###### REORGANIZE on height: 1105940 of 1105940 with cum_difficulty 194347980584
2022-06-03 09:43:48.863 I  alternative blockchain size: 2 with cum_difficulty 194348205003
2022-06-03 09:43:48.962 I ----- BLOCK ADDED AS ALTERNATIVE ON HEIGHT 1105940
2022-06-03 09:43:48.962 I id:   <c0309fd4234addb96f3bd95cf07ed5a40a2d35ea185fbc1fa18614f1437d8512>
2022-06-03 09:43:48.962 I PoW:  <4fc62798fcd6e221ef6db92e94bb020e6c31dc2d6b26db60be3b04ddc7170000>
2022-06-03 09:43:48.962 I difficulty:   224824
2022-06-03 09:43:48.987 I REORGANIZE SUCCESS! on height: 1105940, new blockchain size: 1105942
2022-06-03 09:54:07.697 W No incoming connections - check firewalls/routers allow port 38080

[vtnerd]

Ouch. I don't even know where to begin with this one. This seems like something internal to LMDB, but I'm not sure.

Was the scanner still "catching up" when this occurred? One thing that seems odd is that it appears it caught up ("Processed 1 block(s) against") ... except then it goes right back to catch-up mode ("Processed 999 block(s)").