Door and floor trap generated on same tile.
Not sure whether this is a bug or feature, but I'll report it anyway.
In the home cave of the gremlins a floor trap and door can be generated on the same tile.
I'm assuming that when the player character has a light source this will not happen. So? Floor traps are not generated at the same time as dungeon level generation, interesting.
Attaching the svg. The tile to the east of the player character has both a door, which is closed at the moment, and a water trap on it. Sorry, no light source.