I've recently found out that this has nothing to do with Sourcemod. Sorry for misleading everyone.
When I disabled Movement Unlocker, it ran for a very long time without crashing. My latest test shows this is false.
I disabled Sourcemod entirely and it was still crashing.
I was also able to recreate it. I just had to load some maps a few times (changelevel).
If it was due to a corrupt model, assuming from a map, why would it load without a problem previously?
I removed -nocrashdialog and this is
only seen right before the crash, and never when it loads fine:
Any ideas, asherkin?