Do not parse registry lines that are too short and do not crash on invalid lines (Fixes #1168)

lutris/util/wineregistry.py

@@ -217,6 +217,11 @@ class WineRegistryKey(object):
         return "{0} {1}".format(self.raw_name, self.raw_timestamp)
 
     def parse(self, line):
+        """Parse a registry line, populating meta and subkeys"""
+        if len(line) < 4:
+            # Line is too short, nothing to parse
+            return
+
         if line.startswith('#'):
             self.add_meta(line)
         elif line.startswith('"'):
@@ -224,12 +229,13 @@ class WineRegistryKey(object):
                 key, value = re.split(re.compile(r"(?<![^\\]\\\")="), line, maxsplit=1)
             except ValueError as ex:
                 logger.error("Unable to parse line %s", line)
-                raise
+                logger.exception(ex)
+                return
             key = key[1:-1]
             self.subkeys[key] = value
         elif line.startswith('@'):
-            k, v = line.split('=', 1)
-            self.subkeys['default'] = v
+            key, value = line.split('=', 1)
+            self.subkeys['default'] = value
 
     def add_to_last(self, line):
         last_subkey = list(self.subkeys.keys())[-1]