Fixed error on analysing undefined arrays as args of params.

sqf/analyzer.py

@@ -220,7 +220,7 @@ def execute_code(self, code, extra_scope=None, namespace_name='missionnamespace'
         return outcome
 
     def _parse_params_args(self, arguments, base_token):
-        if isinstance(arguments, Anything):
+        if isinstance(arguments, Anything) or (isinstance(arguments, Array) and arguments.is_undefined):
             return [Anything() for _ in range(len(base_token))]
         return super()._parse_params_args(arguments, base_token)
 

sqf/base_interpreter.py

@@ -60,7 +60,7 @@ def add_params(self, base_token, arguments=None):
 
         if arguments is None or isinstance(arguments, Nothing):
             arguments = self['_this']
-        if isinstance(arguments, Array):
+        if isinstance(arguments, Array) and not arguments.is_undefined:
             arguments = arguments.value
         else:
             arguments = self._parse_params_args(arguments, base_token)

tests/test_analyzer.py

@@ -976,6 +976,11 @@ def test_params_select(self):
         # `_this select 0` is Anything because `_this` only has the type
         self.assertEqual(Anything(), analyzer['x'])
 
+    def test_undefined_array(self):
+        code = '(boundingBoxReal x) params ["_x", "_y"]; _x + _y'
+        analyzer = analyze(parse(code))
+        self.assertEqual(analyzer.exceptions, [])
+
 
 class SpecialContext(TestCase):
     def test_insensitive__foreachindex(self):