use to_numpy

Author: TomAugspurger

pandas/core/indexes/base.py

@@ -266,7 +266,7 @@ def __new__(cls, data=None, dtype=None, copy=False, name=None,
         from .range import RangeIndex
         if isinstance(data, ABCPandasArray):
             # ensure users don't accidentally put a PandasArray in an index.
-            data = data._ndarray
+            data = data.to_numpy()
 
         # range
         if isinstance(data, RangeIndex):

pandas/core/internals/construction.py

@@ -582,7 +582,7 @@ def sanitize_array(data, index, dtype=None, copy=False,
             # We don't want to let people put our PandasArray wrapper
             # (the output of Series/Index.array), into a Series. So
             # we explicitly unwrap it here.
-            subarr = data._ndarray
+            subarr = data.to_numpy()
         else:
             subarr = data