Posting this here because I'm not 100% sure it's a bug and maybe someone can help. Also posting the issue to the bug tracker though.
Basically, I attempt to create a world with the settings seen below, and every time I do so, DF stops at "setting temperature..." and becomes unresponsive, have to use the task manager to exit. There is no map reject log generated (yes, I do have it turned on in init) and nothing happens regardless of how long I wait. Pressing enter/escape to abort seems to be ineffective as well.
[WORLD_GEN]
[TITLE:TWINS1]
[DIM:257:257]
[EMBARK_POINTS:1274]
[END_YEAR:350]
[BEAST_END_YEAR:150:40]
[REVEAL_ALL_HISTORY:1]
[CULL_HISTORICAL_FIGURES:0]
[ELEVATION:1:400:1600:1600]
[RAINFALL:0:100:500:500]
[TEMPERATURE:-20:60:1600:1600]
[DRAINAGE:0:100:600:600]
[VOLCANISM:0:100:600:600]
[SAVAGERY:0:100:600:600]
[ELEVATION_FREQUENCY:1:1:1:1:1:1]
[RAIN_FREQUENCY:1:1:1:1:1:1]
[DRAINAGE_FREQUENCY:1:1:1:1:1:1]
[TEMPERATURE_FREQUENCY:1:1:1:1:1:1]
[SAVAGERY_FREQUENCY:1:1:1:1:1:1]
[VOLCANISM_FREQUENCY:1:1:1:1:1:1]
[TITAN_NUMBER:40]
[TITAN_ATTACK_TRIGGER:60:0:50000]
[DEMON_NUMBER:150]
[GOOD_SQ_COUNTS:1000:10000:20000]
[EVIL_SQ_COUNTS:1000:10000:20000]
[PEAK_NUMBER_MIN:40]
[PARTIAL_OCEAN_EDGE_MIN:0]
[COMPLETE_OCEAN_EDGE_MIN:2]
[VOLCANO_MIN:15]
[REGION_COUNTS:SWAMP:1032:7:6]
[REGION_COUNTS:DESERT:1032:7:6]
[REGION_COUNTS:FOREST:4128:13:12]
[REGION_COUNTS:MOUNTAINS:8256:9:9]
[REGION_COUNTS:OCEAN:13000:15:13]
[REGION_COUNTS:GLACIER:3000:2:1]
[REGION_COUNTS:TUNDRA:3000:2:1]
[REGION_COUNTS:GRASSLAND:8256:13:12]
[REGION_COUNTS:HILLS:8256:13:12]
[EROSION_CYCLE_COUNT:250]
[RIVER_MINS:400:400]
[PERIODICALLY_ERODE_EXTREMES:1]
[OROGRAPHIC_PRECIPITATION:1]
[SUBREGION_MAX:4000]
[CAVERN_LAYER_COUNT:3]
[CAVERN_LAYER_OPENNESS_MIN:0]
[CAVERN_LAYER_OPENNESS_MAX:100]
[CAVERN_LAYER_PASSAGE_DENSITY_MIN:0]
[CAVERN_LAYER_PASSAGE_DENSITY_MAX:100]
[CAVERN_LAYER_WATER_MIN:0]
[CAVERN_LAYER_WATER_MAX:100]
[HAVE_BOTTOM_LAYER_1:1]
[HAVE_BOTTOM_LAYER_2:1]
[LEVELS_ABOVE_GROUND:20]
[LEVELS_ABOVE_LAYER_1:10]
[LEVELS_ABOVE_LAYER_2:10]
[LEVELS_ABOVE_LAYER_3:10]
[LEVELS_ABOVE_LAYER_4:10]
[LEVELS_ABOVE_LAYER_5:20]
[LEVELS_AT_BOTTOM:10]
[CAVE_MIN_SIZE:5]
[CAVE_MIN_SIZE:5]
[CAVE_MAX_SIZE:25]
[MOUNTAIN_CAVE_MIN:100]
[NON_MOUNTAIN_CAVE_MIN:200]
[ALL_CAVES_VISIBLE:1]
[SHOW_EMBARK_TUNNEL:2]
[TOTAL_CIV_NUMBER:70]
[TOTAL_CIV_POPULATION:15000]
[PLAYABLE_CIVILIZATION_REQUIRED:1]
[ELEVATION_RANGES:8256:16512:8256]
[RAIN_RANGES:8256:16512:8256]
[DRAINAGE_RANGES:8256:16512:8256]
[SAVAGERY_RANGES:8256:16512:8256]
[VOLCANISM_RANGES:8256:16512:8256]
I've not had any issues with world gen before, other parameter sets I have created seem to work as intended. Any ideas?