validate fill_value in IntervalArray.take unconditionally (#36538)

Author: jbrockmendel

pandas/core/arrays/interval.py

@@ -812,9 +812,7 @@ def take(self, indices, allow_fill=False, fill_value=None, axis=None, **kwargs):
 
  fill_left = fill_right = fill_value
  if allow_fill:
- if (np.asarray(indices) == -1).any():
- # We have excel tests that pass fill_value=True, xref GH#36466
- fill_left, fill_right = self._validate_fill_value(fill_value)
+ fill_left, fill_right = self._validate_fill_value(fill_value)
 
  left_take = take(
  self.left, indices, allow_fill=allow_fill, fill_value=fill_left

pandas/io/formats/excel.py

@@ -629,7 +629,9 @@ def _format_hierarchical_rows(self):
  ):
 
  values = levels.take(
- level_codes, allow_fill=levels._can_hold_na, fill_value=True
+ level_codes,
+ allow_fill=levels._can_hold_na,
+ fill_value=levels._na_value,
  )
 
  for i in spans: