The proposal to merge lp:~miroslavr256/widelands/bug-1550568-restool_undo_crash 
into lp:widelands has been updated.

Description changed to:

The cause of this bug is dereferencing a past-the-end iterator in 
EditorSetResourcesTool::handle_undo_impl and setting a field's resource index 
to this undefined value.

In certain situations the 'increase/decrease resources' implementation can skip 
storing some of the old resource indices and amounts, which the undo 
implementation does not expect.

For more details, see:
https://code.launchpad.net/~miroslavr256/widelands/bug-1550568-restool_undo_crash/+merge/289007
-- 
Your team Widelands Developers is requested to review the proposed merge of 
lp:~miroslavr256/widelands/bug-1550568-restool_undo_crash into lp:widelands.

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