Also self explanatory. When firing a gun in multiplayer 1.19, there seems to simply be a chance that each shot will crash nearby clients, though not the shooter. The actual errors involved were somewhat variable. Can be recreated by simply loading up two instances of the game, joining them with LAN, and then magdumping a few times.

Thanks for the report. Can you please include a crash log?

I believe that the issue just submitted by ironslaves is the same problem.