sakia 0.11.13 crash report

Created by: galuel

After a right clic on "transactions tab" which contained no transaction at all.

DEBUG:wot_tab:draw_graph:Draw graph - galuel DEBUG:decorators:task_done:Task already removed DEBUG:decorators:task_done:Task already removed DEBUG:decorators:task_done:Task already removed DEBUG:decorators:task_done:Task already removed DEBUG:init:requests_get:Request : http://metab.ucoin.io:80/network/peering/peers DEBUG:main:async_exception_handler:Exception handler executing ERROR:main:async_exception_handler:Task exception was never retrieved future: <Task finished coro=<history_context_menu() done, defined at /home/travis/build/ucoin-io/sakia/src/sakia/gui/transactions_tab.py:168> exception=TypeError("unhashable type: 'QVariant'",)> Traceback (most recent call last): File "/home/travis/.pyenv/versions/3.4.3/lib/python3.4/asyncio/tasks.py", line 238, in _step File "/home/travis/build/ucoin-io/sakia/src/sakia/gui/transactions_tab.py", line 186, in history_context_menu File "/home/travis/build/ucoin-io/sakia/src/sakia/core/registry/identities.py", line 104, in future_find TypeError: unhashable type: 'QVariant'