mypy-replace must use name mangling prefix

Author: ikonst

mypy/plugins/dataclasses.py

@@ -76,7 +76,7 @@
     frozen_default=False,
     field_specifiers=("dataclasses.Field", "dataclasses.field"),
 )
-_INTERNAL_REPLACE_SYM_NAME = "mypy-replace"
+_INTERNAL_REPLACE_SYM_NAME = "__mypy-replace"
 
 
 class DataclassAttribute:

test-data/unit/deps.test

@@ -1388,8 +1388,8 @@ class B(A):
 <m.A.(abstract)> -> <m.B.__init__>, m
 <m.A.__dataclass_fields__> -> <m.B.__dataclass_fields__>
 <m.A.__init__> -> <m.B.__init__>, m.B.__init__
-<m.A.mypy-replace> -> <m.B.mypy-replace>
-<m.A.mypy-replace> -> <m.B.__new__>
+<m.A.__mypy-replace> -> <m.B.__mypy-replace>
+<m.A.__new__> -> <m.B.__new__>
 <m.A.x> -> <m.B.x>
 <m.A.y> -> <m.B.y>
 <m.A> -> m, m.A, m.B
@@ -1420,7 +1420,7 @@ class B(A):
 <m.A.__dataclass_fields__> -> <m.B.__dataclass_fields__>
 <m.A.__init__> -> <m.B.__init__>, m.B.__init__
 <m.A.__match_args__> -> <m.B.__match_args__>
-<m.A.mypy-replace> -> <m.B.mypy-replace>
+<m.A.__mypy-replace> -> <m.B.__mypy-replace>
 <m.A.__new__> -> <m.B.__new__>
 <m.A.x> -> <m.B.x>
 <m.A.y> -> <m.B.y>