Author: Ronan Lamy <ronan.l...@gmail.com>
Branch: 
Changeset: r93876:2ec2d28bba33
Date: 2018-02-23 16:01 +0000
http://bitbucket.org/pypy/pypy/changeset/2ec2d28bba33/

Log:    Complain if we pass None to something which expects unicode or str

diff --git a/rpython/rlib/objectmodel.py b/rpython/rlib/objectmodel.py
--- a/rpython/rlib/objectmodel.py
+++ b/rpython/rlib/objectmodel.py
@@ -137,14 +137,11 @@
     def decorator(f):
         def get_annotation(t):
             from rpython.annotator.signature import annotation
-            from rpython.annotator.model import SomeObject, SomeString, 
SomeUnicodeString
+            from rpython.annotator.model import SomeObject
             if isinstance(t, SomeObject):
                 return t
-            s_result = annotation(t)
-            if (isinstance(s_result, SomeString) or
-                isinstance(s_result, SomeUnicodeString)):
-                return s_result.__class__(can_be_None=True)
-            return s_result
+            return annotation(t)
+
         def get_type_descr_of_argument(arg):
             # we don't want to check *all* the items in list/dict: we assume
             # they are already homogeneous, so we only check the first
diff --git a/rpython/rlib/test/test_objectmodel.py 
b/rpython/rlib/test/test_objectmodel.py
--- a/rpython/rlib/test/test_objectmodel.py
+++ b/rpython/rlib/test/test_objectmodel.py
@@ -484,12 +484,6 @@
     # in RPython there is an implicit int->float promotion
     assert f(42) == 42
 
-def test_enforceargs_None_string():
-    @enforceargs(str, unicode)
-    def f(a, b):
-        return a, b
-    assert f(None, None) == (None, None)
-
 def test_enforceargs_complex_types():
     @enforceargs([int], {str: int})
     def f(a, b):
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