Add bug deliberately

Author: makbigc

pandas/core/indexes/base.py

@@ -2498,35 +2498,6 @@ def intersection(self, other, sort=False):
         else:
             rvals = other._values
 
-        if self.is_monotonic and other.is_monotonic:
-            try:
-                result = self._inner_indexer(lvals, rvals)[0]
-                return self._wrap_setop_result(other, result)
-            except TypeError:
-                pass
-
-        try:
-            indexer = Index(rvals).get_indexer(lvals)
-            indexer = indexer.take((indexer != -1).nonzero()[0])
-        except Exception:
-            # duplicates
-            indexer = algos.unique1d(
-                Index(rvals).get_indexer_non_unique(lvals)[0])
-            indexer = indexer[indexer != -1]
-
-        taken = other.take(indexer)
-
-        if sort is None:
-            taken = sorting.safe_sort(taken.values)
-            if self.name != other.name:
-                name = None
-            else:
-                name = self.name
-            return self._shallow_copy(taken, name=name)
-
-        if self.name != other.name:
-            taken.name = None
-
         return taken
 
     def difference(self, other, sort=None):