Dwarf Fortress Bug Tracker - Dwarf Fortress
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0001558Dwarf FortressDwarf Mode -- Environmentpublic2010-04-26 14:272011-06-13 15:36
king doom 
0001558: When water freezes/thaws on a ramp tile, upward ramp is left without corresponding downward ramp
I made a moat, I flooded it, due to a miscalculation several ramps were left behind. Come winter, the moat froze, and the ramps broke. They still existed when the water melted during spring, but they only existed from the bottom, you could not see them from the top, the surface of the moat, where they had been before the river froze. The ^ part existed, but the v part on the level above that was gone totally.
Didn't get a chance to have a dwarf use the ramp, but I suspect said dwarf would have found a portal to another dimension, possibly the world of Dungeon Keeper. Will attempt to replicate, secondary objectives are to secure, tame and begin captive breeding of Horned Reapers.
Frozen, ramps
has duplicate 0002487resolved Footkerchief Mismatched ramps after digging out ice 
has duplicate 0003219resolved Footkerchief frozen ramps lack floor. 
has duplicate 0004698resolved Dwarfu Freezing causes downward slopes to disappear. 
child of 0001265new  Ramps covered with ice have no floors above, adventurer can "fly" over 
Issue History
2010-04-26 14:27king doomNew Issue
2010-04-26 14:51FootkerchiefSummaryFreezing water detaches ramps. => When water freezes/thaws on a ramp tile, upward ramp is left without corresponding downward ramp
2010-04-26 16:14king doomTag Attached: ramps
2010-04-26 16:14king doomTag Attached: Frozen
2010-07-25 14:35FootkerchiefRelationship addedchild of 0001265
2010-07-25 14:35FootkerchiefRelationship addedhas duplicate 0002487
2010-07-26 03:11zweiIssue Monitored: zwei
2010-07-26 05:06zweiNote Added: 0011067
2010-07-26 05:37ThrelicusIssue Monitored: Threlicus
2010-11-24 11:09FootkerchiefRelationship addedhas duplicate 0003219
2011-06-12 23:47DwarfuRelationship addedhas duplicate 0004698
2011-06-13 15:36Hieronymous AlloyIssue Monitored: Hieronymous Alloy

2010-07-26 05:06   
I can corfirm this issue: Embark to freezing biome, channel edge of water and wait to water to freeze/unfreeze.

Quite annoying and source fo confusion, but since downward ramp is preserved, dwarves are still able to climb up from water if they accidentally fall into it.

In fact, it can be abused to easily create one-way passage.