invisible door

[yenge]

Before a metal gate

[Exits: west]

<1133/1133hp 662/662mana 375/376mv 400872tnl | W> open e
You open the gigantic metal gate.

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> scan e
You peer intently east.

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> s
Alas, you cannot go that way.

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> n
Alas, you cannot go that way.

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> scan e
You peer intently east.

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> l
Before a metal gate
  You stand before a gigantic metal gate set into the very underearth
of the desert. It seems an impossible thing, but perhaps it leads to
a buried city, forgotten long ago after ages of decadence and ruin in
the civilization. If it is, there is no telling what kind of city it
could be and what you could find there. The door seems solid, and you
might be able to open it ... perhaps. Back to the west, the black
tunnel leads up somewhere to the main tunnel.

[Exits: west]

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> open e
It's already open.

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> scan e
You peer intently east.

<1133/1133hp 662/662mana 376/376mv 400872tnl | W>

1133/1133hp 662/662mana 376/376mv 400872tnl | W> close e
You close the gigantic metal gate.

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> l
Before a metal gate
  You stand before a gigantic metal gate set into the very underearth
of the desert. It seems an impossible thing, but perhaps it leads to
a buried city, forgotten long ago after ages of decadence and ruin in
the civilization. If it is, there is no telling what kind of city it
could be and what you could find there. The door seems solid, and you
might be able to open it ... perhaps. Back to the west, the black
tunnel leads up somewhere to the main tunnel.

[Exits: west]

<1133/1133hp 662/662mana 376/376mv 400872tnl | W> open e
You open the gigantic metal gate.

Ereven shrugs....

[jemma]

Try up or down?

[yenge]

Try up or down?

i did

[Nyrl]

(almost) not a bug
This simply means that this room has an exit to east, exit with door, but exit leads to unexistent room (or room with negative ID).
Of course, You are not allowed to move to such room in any case.

[Nuitari]

Fixed, coming next reboot.