ignore old obscure changes in the state file

1 files changed, 12 insertions, 8 deletions

diff --git a/geldschieberbot.py b/geldschieberbot.py
index 39352d2..2853379 100644
--- a/geldschieberbot.py
+++ b/geldschieberbot.py
@@ -153,14 +153,18 @@ class Geldschieberbot:
         except (KeyError, TypeError):
             # convert from old plain changes format
             if isinstance(list(self.state['changes'].values())[0], list):
-                self.state['changes'] = {
-                    name: [
-                        Change(ch[0],
-                               [Modification(r, d, a)
-                                for r, d, a in ch[1:]], None) for ch in changes
-                    ]
-                    for name, changes in self.state['changes'].items()
-                }
+                for name, changes in self.state['changes'].items():
+                    user_changes = []
+                    for ch in changes:
+                        try:
+                            user_changes.append(
+                                Change(ch[0], [
+                                    Modification(r, d, a) for r, d, a in ch[1:]
+                                ], None))
+                        except (ValueError, TypeError):
+                            continue
+
+                    self.state['changes'][name] = user_changes
 
         for key in self.STATE_KEYS:
             # add missing keys to an existsing state