[pypy-commit] pypy py3.7: better error message for object.__new__

[cfbolz]

Author: Carl Friedrich Bolz-Tereick <cfbolz at gmx.de>
Branch: py3.7
Changeset: r98464:4887e271842a
Date: 2020-01-06 20:49 +0100
http://bitbucket.org/pypy/pypy/changeset/4887e271842a/

Log:	better error message for object.__new__

diff --git a/pypy/objspace/std/objectobject.py b/pypy/objspace/std/objectobject.py
--- a/pypy/objspace/std/objectobject.py
+++ b/pypy/objspace/std/objectobject.py
@@ -109,7 +109,7 @@
         if (w_parent_init is space.w_object or
             w_parent_new is not space.w_object):
             raise oefmt(space.w_TypeError,
-                        "object() takes no parameters")
+                        "%s() takes no parameters", w_type.name)
     if w_type.is_abstract():
         _abstract_method_error(space, w_type)
     return space.allocate_instance(W_ObjectObject, w_type)
diff --git a/pypy/objspace/std/test/test_obj.py b/pypy/objspace/std/test/test_obj.py
--- a/pypy/objspace/std/test/test_obj.py
+++ b/pypy/objspace/std/test/test_obj.py
@@ -366,6 +366,14 @@
         object.__init_subclass__() # does not crash
         raises(TypeError, object.__init_subclass__, 1)
 
+    def test_better_error_init(self):
+        class A: pass
+
+        with raises(TypeError) as excinfo:
+            A(1)
+        assert "A() takes no parameters" in str(excinfo.value)
+
+
 def test_isinstance_shortcut():
     from pypy.objspace.std import objspace
     space = objspace.StdObjSpace()