File "electrum/gui/qt/main_window.py", line 641, in timer_actions
  File "electrum/gui/qt/main_window.py", line 757, in update_wallet
  File "electrum/gui/qt/main_window.py", line 760, in update_tabs
  File "electrum/gui/qt/util.py", line 521, in update
  File "electrum/util.py", line 336, in <lambda>
  File "electrum/util.py", line 332, in do_profile
  File "electrum/gui/qt/history_list.py", line 219, in on_update
  File "electrum/util.py", line 336, in <lambda>
  File "electrum/util.py", line 332, in do_profile
  File "electrum/wallet.py", line 398, in get_full_history
  File "electrum/address_synchronizer.py", line 470, in f
  File "electrum/address_synchronizer.py", line 501, in get_history
  File "electrum/address_synchronizer.py", line 782, in get_balance
  File "electrum/address_synchronizer.py", line 470, in f
  File "electrum/address_synchronizer.py", line 740, in get_addr_balance
  File "electrum/address_synchronizer.py", line 698, in get_addr_io
  File "electrum/address_synchronizer.py", line 100, in get_address_history
  File "electrum/address_synchronizer.py", line 603, in get_tx_height