Add a warning for invalid dictionaries

pythonfuzz/dictionary.py

@@ -46,16 +46,18 @@ def load_file(self, dict_path):
 
         _dict = set()
         with open(dict_path) as f:
-            for line in f:
+            for nb, line in enumerate(f):
                 line = line.lstrip()
                 if not line or line.startswith('#'):
                     continue
                 word = self.line_re.search(line)
-                if word:
-                    # Decode any escaped characters, giving us a bytes object
-                    value = word.group(1)
-                    (value, _) = codecs.escape_decode(value)
-                    _dict.add(value)
+                if not word:
+                    print('Error while loading the dictionary "%s" at line %d.'
+                            % (dict_path, line))
+                # Decode any escaped characters, giving us a bytes object
+                value = word.group(1)
+                (value, _) = codecs.escape_decode(value)
+                _dict.add(value)
         self._dict = list(_dict)
 
     def get_word(self):