0003750: Occasional infinite loop, apparently caused by pathfinding

Notes
(0014276) Footkerchief (manager) 2010-11-28 12:48	Are you due for a season change? This sounds a lot like 0001899. Try letting it run overnight and see if it comes back to life.

(0014285) deekoo (reporter) 2010-11-28 17:20	I'm due for a season change, but I don't think there's any ice on the map at the moment. Try 5: Loaded sometime before 16:49, looked around. It was 20th Obsidian/Late winter when I checked. I looked around on the map for ice, didn't see any, but did notice interface freezes that lasted for several seconds to about a minute. Another snatcher showed up and paused the game; unpaused, it ground onward into Granite and the arrival of the forgotten beast Aspast, a great hairy mite with a bloated body and huge mandibles. The goblins are still wandering around loose as of 16:59, and my dwarves are not enjoying the vermin shortage in the discontiguous burrow, but the game's running.

(0014287) deekoo (reporter) 2010-11-28 17:21	I'll try running it overnight next time I get it to lock up, though.

(0014297) deekoo (reporter) 2010-11-29 06:55	Try 6: Loaded at 17:09. Erratic interface hangs of a few seconds as I looked around. No visible ice. When I looked back at 17:21, the interface had locked up. At 17:55, it was still locked up, but, interestingly, the error log has been updating - so I hit escape in the hopes that it might actually let me save during the lockup. 6:19 the following morning, it still seems locked up and hasn't noticed that I hit escape; it has, however, added 106 lines of "path fail: dwarf,56,95,20 -> 97,78,165: Id #12755:Path Goal Undead Hunt:Station None at 56,95,20" to the error log, and seems to be continuing to add them every seven minutes or so. I accidentally ^Z'd the GDB attached to the game while poking at the error log, and fumbling around trying to figure out how to make the TSTPs go away caused gdb to complain that further debugging may prove unreliable - but a few minutes after that, it drew a single frame, so I spammed a bunch of escapes into the DF window. As of 6:30 or so, another undead hunt failure has shown up in the error log and I'm attempting to save.

(0014299) deekoo (reporter) 2010-11-29 07:19	... and here's a save made during the lockup: http://dffd.wimbli.com/file.php?id=3499 [^]

(0014300) Footkerchief (manager) 2010-11-29 07:29	Yeah, sounds like it's indeed pathfinding-related, thanks for investigating.

(0014383) ElthMysterius (reporter) 2010-12-02 20:40	I think I'm getting the same issue, but not as bad as you. I'm getting almost-constant lockups that last from 10-15 seconds up to a full minute. In my errorlog, I have quite a few instances of: loop path fail: <invalid goal> human,0,8,47 -> -8,8,47: Id #20022:Path Goal Seek Station:Station Mill Anywhere at 143,35,47 Repeated almost 20 times, with differing creature and job names. Amongst the creatures are some that are from the HFS, although I haven't even breached it. So yeah, you're not the only one with this issue. I run Windows Vista 32-bit if it's any relevent.

(0014385) Zeffrin (reporter) 2010-12-03 01:57 edited on: 2010-12-03 02:51	This sounds exactly like my trouble and I checked the errorlog and found that interestingly enough my guys were getting path fail while trying to hunt undead too The only undead I know of at my fort is a lost miner who wandered into a cave never to return and never laid to rest, there's no path to him, how do they even know about him since there's been no path since before he died. edit: Found the lost miner, somehow he got into the fort. Now I need to figure out how to get rid of him. loop path fail: <same square> dwarf,Dump Item,141,120,172 -> 134,111,172: Id 0000776:Path Goal Seek Item for Storage:Station Mill Building at 148,125,173 loop path fail: <same square> dog,146,121,173 -> 147,121,173: Id 0000479:Path Goal Seek Station:Station Owner at 148,124,173 path fail: dwarf,Hunt for Small Creature,64,139,24 -> 45,156,24: Id 0000472:Path Goal Wander Vermin Hunting Spot:Station Milling Flood at 134,108,25 loop path fail: <same square> cat,137,135,173 -> 133,141,173: Id 0000815:Path Goal Seek Station:Station Owner at 135,124,173 loop path fail: <same square> dwarf,Dump Item,134,125,173 -> 50,124,174: Id 0000478:Path Goal Seek Item for Storage:Station Mill Building at 145,123,173 path fail: dwarf,89,133,24 -> 134,161,173: Id 0000472:Path Goal Undead Hunt:Station None at 87,130,24 path fail: dwarf,89,133,24 -> 134,164,173: Id 0000472:Path Goal Undead Hunt:Station None at 89,133,24 path fail: dwarf,117,125,143 -> 83,134,24: Id 0000472:Path Goal Seek Station:Station None at 83,131,24 path fail: dwarf,84,126,25 -> 144,120,173: Id 0000472:Path Goal Undead Hunt:Station None at 84,126,25 path fail: dwarf,84,126,25 -> 144,120,173: Id 0000472:Path Goal Undead Hunt:Station None at 84,126,25 path fail: dwarf,142,110,170 -> 82,130,24: Id 0000472:Path Goal Seek Station:Station Undead Hunt at 82,130,24

Issue History
Date Modified	Username	Field	Change
2010-11-28 10:26	deekoo	New Issue
2010-11-28 12:48	Footkerchief	Note Added: 0014276
2010-11-28 12:48	Footkerchief	Tag Attached: AWAITING UPDATE
2010-11-28 12:48	Footkerchief	Relationship added	related to 0001899
2010-11-28 17:20	deekoo	Note Added: 0014285
2010-11-28 17:21	deekoo	Note Added: 0014287
2010-11-29 06:55	deekoo	Note Added: 0014297
2010-11-29 07:19	deekoo	Note Added: 0014299
2010-11-29 07:29	Footkerchief	Tag Detached: AWAITING UPDATE
2010-11-29 07:29	Footkerchief	Note Added: 0014300
2010-12-02 16:28	Khym Chanur	Issue Monitored: Khym Chanur
2010-12-02 20:40	ElthMysterius	Note Added: 0014383
2010-12-03 01:57	Zeffrin	Note Added: 0014385
2010-12-03 02:00	Zeffrin	Issue Monitored: Zeffrin
2010-12-03 02:51	Zeffrin	Note Edited: 0014385	View Revisions
2010-12-03 10:44	Footkerchief	Relationship added	has duplicate 0003678
2014-01-18 07:59	Footkerchief	Relationship added	related to 0006414
2014-01-18 07:59	Footkerchief	Relationship added	related to 0002814