Critical Error: Unhandled exception: MO(620): stack dirty be

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2005/12/06 :
I am not the original bug submitter but as I stumbled upon
the same problem, I thought it would be useful to give some
clues.

I ran wideland build9-7 on Debian unstable (package from
Martin Quinson's page, downloaded on 2005/12/06).

Kernel : 2.6.11 (on 32 bits mode)
CPU : AMD Athlon64 3200
RAM : 1 GB
GPU : GeForce 2 MX 400 with nVidia close-source driver

It happened in the Tutorial II campaign.
I had already build mines (Iron Ore, Coal, Granite) + one farm.
I was building a Tavern, a Gamemaster hut, a quarry in the
north-eastern part of the map (north of the mountain), a
Well, a Lumberjack, a Bakery and a second Farm.

Here is the console output of the game, till the crash (at
the bottom) :
=================================================
(beginning is missing)
MO(853): [road]: Go pick up item from 0
MO(853): Bob::walk_to_index: Move from 2 to 0.
MO(2115): Bob::walk_to_index: Move from 0 to 3.
MO(803): [road]: Go pick up item from 1
MO(803): Bob::walk_to_index: Move from 0 to 2.
MO(874): Bob::walk_to_index: Move from 3 to 2.
MO(2418): [transport]: pick up from flag.
WareList: Wanting to remove 1/46 wares of type (34)
MO(2418): Bob::walk_to_index: Move from 0 to 2.
MO(2336): [road]: Idle.
MO(929): [program]: plant#6
MO(929): Return(1)
MO(929): start_task_return
MO(929): pushed task
MO(929): done
MO(929): [return]: Move to building's flag
MO(1311): [road]: Idle.
MO(1615): [road]: Idle.
MO(1327): [transport]: pick up from flag.
WareList: Wanting to remove 1/169 wares of type (35)
MO(1327): Bob::walk_to_index: Move from 0 to 2.
WareList: Wanting to remove 1/10 wares of type (28)
TI(2449): go to next flag
MO(845): Flag::call_carrier(2449): Call
MO(1255): notify_ware(0): already acked 0
MO(836): [transport]: back to idle.
MO(836): find_pending_item: flag 1
MO(836): [road]: delay (acked for 1)
TW(2473): location flag == destination flag
MO(2473): [transfer]: on road 2193, to flag 2191, index is 0
MO(2473): [transfer]: arrive at flag 2191
TW(2473): location flag == destination flag
MO(2473): [transfer]: move from flag to building
MO(836): [road]: Go pick up item from 1
MO(836): [transport]: pick up from flag.
WareList: Wanting to remove 1/35 wares of type (15)
MO(2413): [road]: Idle.
MO(836): Bob::walk_to_index: Move from 2 to 0.
TW(2505): trim start flag (road)
TW(2505): move to first flag
MO(2505): [transfer]: on road 828, to flag 845, index is 2
MO(2505): [transfer]: arrive at flag 845
TW(2505): go to next flag
MO(2505): [transfer]: move to next flag via road 1254
MO(1908): Bob::walk_to_index: Move from 2 to 1.
WareList: Wanting to remove 1/46 wares of type (34)
TI(2358): go to next flag
MO(1538): Flag::call_carrier(2358): Call
MO(1518): notify_ware(1)
MO(1540): [transport]: back to idle.
MO(1540): Bob::walk_to_index: Move from 0 to 1.
MO(1518): [road]: Go pick up item from 1
MO(1518): Bob::walk_to_index: Move from 1 to 2.
MO(1255): [transport]: pick up from flag.
WareList: Wanting to remove 1/169 wares of type (35)
MO(1255): Bob::walk_to_index: Move from 0 to 2.
WareList: Wanting to remove 1/169 wares of type (35)
TI(2401): go to next flag
MO(1275): Flag::call_carrier(2401): Call
MO(1311): noti...

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I have completed tutorial 2 successfully with current svn
sources. If you can reliably reproduce this problem with
latest svn:
* tell which revision you tested with
* Describe step by step how you do. If you start from a
savegame, attach it.
* reopen