tqt history list: fix #4896 - electrum - Electrum Bitcoin wallet
  HTML git clone https://git.parazyd.org/electrum
   DIR Log
   DIR Files
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   DIR Submodules
       ---
   DIR commit e35f2c5beded584fa2845af9f3a6f18211a75a23
   DIR parent 923a9c36cbf4b47e5942e80ebb478dcc063e5611
  HTML Author: SomberNight <somber.night@protonmail.com>
       Date:   Tue,  4 Dec 2018 17:27:02 +0100
       
       qt history list: fix #4896
       
       Diffstat:
         M electrum/gui/qt/history_list.py     |       4 +++-
       
       1 file changed, 3 insertions(+), 1 deletion(-)
       ---
   DIR diff --git a/electrum/gui/qt/history_list.py b/electrum/gui/qt/history_list.py
       t@@ -461,7 +461,9 @@ class HistoryList(MyTreeView, AcceptFileDragDrop):
                org_idx: QModelIndex = self.indexAt(position)
                idx = self.proxy.mapToSource(org_idx)
                item: QStandardItem = self.std_model.itemFromIndex(idx)
       -        assert item, 'create_menu: index not found in model'
       +        if not item:
       +            # can happen e.g. before list is populated for the first time
       +            return
                tx_hash = idx.data(self.TX_HASH_ROLE)
                column = idx.column()
                assert tx_hash, "create_menu: no tx hash"