[drewolbrich]

I remember writing one of these and typing "put bag in bag" and then being confused why the bag disappeared from the world.

[reactordev]

This was a long running bug with merc based muds. The logic was to scan the room items first which cased the bug. Later versions would scan corpses first, then self, then room.

[IggleSniggle]

Should have done it the other way around

[itsbenweeks]

Much better to have the world disappear from the bag.

[kevindamm]

put bag in bag of "things which do not contain itself"

[dp-hackernews]

Russell's Paradox: https://en.m.wikipedia.org/wiki/Russell%27s_paradox