File "electrum/gui/qt/transaction_dialog.py", line 212, in save
  File "electrum/gui/qt/main_window.py", line 3214, in save_transaction_into_wallet
  File "electrum/util.py", line 336, in <lambda>
  File "electrum/util.py", line 332, in do_profile
  File "electrum/address_synchronizer.py", line 431, in save_transactions
  File "electrum/util.py", line 336, in <lambda>
  File "electrum/util.py", line 332, in do_profile
  File "electrum/storage.py", line 107, in write
  File "electrum/storage.py", line 119, in _write