config: reject non-json-serialisable writes

see #4788
2018-10-21 14:58:55 +02:00
parent ef2a6359e4
commit 6958c0ccc3
2 changed files with 7 additions and 1 deletions
--- a/electrum/storage.py
+++ b/electrum/storage.py
@@ -90,7 +90,7 @@ class JsonDB(PrintError):
            json.dumps(key, cls=util.MyEncoder)
            json.dumps(value, cls=util.MyEncoder)
        except:
-            self.print_error("json error: cannot save", key)
+            self.print_error(f"json error: cannot save {repr(key)} ({repr(value)})")
            return
        with self.db_lock:
            if value is not None: