changed the way how the dynamic param function searches it's parent scope, to enable smooth list comprehension following

jedi/evaluate/dynamic.py

@@ -95,7 +95,7 @@ def search_params(evaluator, param):
                         continue
                     scopes = [scope]
                     if first:
-                        scopes = evaluator.eval_call_path(iter(first), scope, pos)
+                        scopes = evaluator.eval_call_path(iter(first), c.parent, pos)
                         pos = None
                     from jedi.evaluate import representation as er
                     for scope in scopes:

jedi/evaluate/finder.py

@@ -50,7 +50,11 @@ class NameFinder(object):
                          and isinstance(self.name_str.parent.parent, pr.Param)):
             if not isinstance(self.name_str, (str, unicode)):  # TODO Remove?
                 err_type = 'name-error' if search_global else 'attribute-error'
-                message = ('AttributeError: %s has no attribute %s'
+                if err_type == 'name-error':
+                    message = ("NameError: name '%s' is not defined."
+                               % self.name_str)
+                else:
+                    message = ('AttributeError: %s has no attribute %s.'
                                % (self._last_filter_name_scope, self.name_str))
                 analysis.add(self._evaluator, err_type, self.name_str, message,
                              payload=(self.scope, self.name_str))

test/static_analysis/attribute_error.py

@@ -76,6 +76,12 @@ return_one(''.undefined_attribute)
 
 [r for r in [1, 2]]
 
+# some random error throw
+class NotCalled():
+    def match_something(self, param):
+        seems_to_need_an_assignment = param
+        return [value.match_something() for value in []]
+
 # -----------------
 # decorators
 # -----------------