Game crash

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Stephen4Louise
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File: error.JPG (14.4 KB)
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Game crash (+1)

I am consistently getting the attached crash while playing one particualr room in The long quest.

Click here to view the secret text

Error appears as soon as I step towards the room exit.
No crash if I exit with clearing the room first.

Further testing has revealed the following strange situation...

Click here to view the secret text

drod.err has some further info..

Click here to view the secret text

Note : the attached error.jpg is different to the image in the secret tag.

Steve

[Last edited by Stephen4Louise at 07-12-2007 10:22 PM]

07-12-2007 at 10:05 PM

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Stephen4Louise
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Re: Game crash (0)

Further update. I can clear and exit the room as long as the snakes don't get caught up anywhere.

Steve.

07-13-2007 at 08:30 PM

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Tim
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File: Adder Hot Tile Bug.hold (1.2 KB)
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Re: Game crash (+1)

I'd really like people not to use anyone edit holds to prove the point.

Further testing shows that it only works with adders in combination with hot tiles, and only for deaths on only either even/odd turns.
(Try to step on the power token a turn later.)

Test hold attached. (a 300 hold, by the way.)

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07-14-2007 at 12:02 AM

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eytanz
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Re: Game crash (0)

Tim wrote:
I'd really like people not to use anyone edit holds to prove the point.

Huh?

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07-14-2007 at 12:07 AM

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Tim
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Re: Game crash (0)

Oh, I just played for an hour or something to get to that room. Grrr. (The hold was set to you and masters.)

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07-14-2007 at 12:15 AM

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CuriousShyRabbit
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Re: Game crash (+1)

I have also experienced the adder-and-hot-tile bug when playing one of the holds that I'm beta testing (tokyokid's hold).

Just as Steve describes, the trouble starts when an adder loops around on itself on hot tiles. This leads to weird graphics, similar to what Steve posted and to those in the original bug thread, beeps, and the following line in drod.err:

Assertion error in line 168 of .\Serpent.cpp: "!"Bad tile.""

Is this because it's shortening for two reasons: biting its own tail and frying at the same time? It happens almost every time the adder loops around on itself. Once time, though, after conquering the room in such a way the that serpent looped around on itself, I didn't get the above assertion error, and instead the game crashed, placing the following lines in drod.err:

Assertion error in line 153 of .\Serpent.cpp: "pMonster"
Assertion error in line 155 of .\Serpent.cpp: "pBackPiece"
Assertion error in line 2579 of .\DbRooms.cpp: "pMonster->bAlive"

Again, all quite similar to what's been described before.

[Last edited by CuriousShyRabbit at 07-14-2007 12:38 AM]

07-14-2007 at 12:36 AM

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eytanz
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Re: Game crash (+1)

Tim wrote:
Oh, I just played for an hour or something to get to that room. Grrr. (The hold was set to you and masters.)

So, I guess it was a typo - you meant you want people to use anyone edit, not that you don't want them to, right?

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07-14-2007 at 03:26 AM

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Stephen4Louise
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Re: Game crash (0)

Tim wrote:
Oh, I just played for an hour or something to get to that room. Grrr. (The hold was set to you and masters.)

That was the hold I was playing when I saw the error, so that's what I used to describe it. It's a good hold anyway to that point, so worth playing.

Steve.

07-14-2007 at 08:16 AM

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trick
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Re: Game crash (+2)

Thanks, guys! The problem was indeed that Adders would shorten twice if they happened to eat themselves while on a hot tile. I've fixed this so that they only shorten once in this case.

Also, I played around a bit and noticed that Rattlesnakes can shorten twice per turn too, if you stab them and a tail segment then ends up on a hot tile. This doesn't result in any problems though, and I'm not sure if it should be considered a bug. Any opinions on this?

07-15-2007 at 12:44 AM

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Jatopian
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Re: Game crash (+1)

Personally I think that it's quite intuitive for the snakes to shorten twice, and also adds some minor puzzle potential.

trick wrote:
The problem was indeed that Adders would shorten twice if they happened to eat themselves while on a hot tile. I've fixed this so that they only shorten once in this case.

This isn't much better, IMO. Now, instead of crashing the game, it's just counterintuitive. What this required was better error trapping, not a behavioral change.

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[Last edited by Jatopian at 07-15-2007 05:16 AM]

07-15-2007 at 04:05 AM

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TFMurphy
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Re: Game crash (+2)

Well, here's the main ways Rattlesnakes and Adders shorten, and whether they stack.

Rattlesnakes
1. Their tail moves on to a sword.
2. A sword moves on to their tail.
3. Their tail stops on a hot tile for one turn.

All three coexist, but #3 (Hot Tiles) can only take effect once per turn. #1 only works once per turn, but #2 can work multiple times dependent on movement order.

Adders
1. A sword moves on to their head.
2. All remaining exits for the head are blocked and one of the three valid directions is only blocked by another Adder.
3. Their head stops on a hot tile for one turn.

In 3.0.0, all three coexist. We note that their head moving on to a sword does not shorten the snake (for various reasons), but multiple swords moving on to the head will (this is not a bad thing though).

Adders only taking one hit from a hot tile makes sense because they have only one vulnerable point and a hot tile only counts as getting "stabbed" once (see Rock Giants). Rattlesnakes only taking one hit from a hot tile makes sense from a game balance point of view. The basic concept here appears to be that no snake should shrink multiple times from a *SINGLE* source of damage.

What we have here, though, is multiple sources of damage. So, yes, I agree with Jatopian - I don't think an Adder eating itself and getting burned by a hot tile should limit shrinkage to one step. They're independent things, and it's not like it's the only way to get the Adder to shrink multiple times in the same turn.

[Last edited by TFMurphy at 07-15-2007 07:11 AM]

07-15-2007 at 07:06 AM

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trick
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Re: Game crash (+2)

Hm, yeah, I agree. Okay, I've fixed this again, but this time green serpents (and other colours, too) can yet again shorten multiple times in a turn, but now in a new and improved way that includes less corruption of reality. Yay! Thanks for keeping an eye on me, guys

07-15-2007 at 09:33 AM

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Kwakstur
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Re: Game crash (0)

But this raises the question . . . does the tail moving twice a turn violate the one-move per turn rule of DROD?

Well, technically, the tail doesn't move, I guess. On a Serpent, the tail is set to dissappear every turn, while a new tail appears on the next segment. So the Serpent seems to shrink when trapped because, even though its head can't move, it's tail continues to.
But, regardless, the tail is technically moving. An enemy moves the same way, disappearing from one tile and reappearing in the next.

So does a snake tail on hot tiles violate the rule of one-move per turn?

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07-19-2007 at 10:04 AM

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mrimer
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Re: Game crash (0)

Kwakstur wrote:
...does the tail moving twice a turn violate the one-move per turn rule of DROD?
...
So does a snake tail on hot tiles violate the rule of one-move per turn?

There is no explicit rule in DROD that objects are not allowed to move more than one tile per turn. In specific situations, it is known to happen and we haven't seen the need to put in explicit rules to prevent that.

However, regarding snake tails -- it is not the tail that moves two tiles in one turn, but rather two segments are broken off on the same turn. Again, I don't see a need to explicitly forbid breaking off more than one segment per turn.

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[Last edited by mrimer at 07-19-2007 05:02 PM]

07-19-2007 at 05:01 PM

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