make sure to type check on get_loc in large hashtables

Author: jreback

pandas/_libs/index.pyx

@@ -113,6 +113,8 @@ cdef class IndexEngine:
             if not self.is_unique:
                 return self._get_loc_duplicates(val)
             values = self._get_index_values()
+
+            self._check_type(val)
             loc = _bin_search(values, val)  # .searchsorted(val, side='left')
             if loc >= len(values):
                 raise KeyError(val)

pandas/_libs/index_class_helper.pxi.in

@@ -51,6 +51,8 @@ cdef class {{name}}Engine(IndexEngine):
             raise KeyError(val)
         elif util.is_float_object(val):
             raise KeyError(val)
+        elif not util.is_integer_object(val):
+            raise KeyError(val)
     {{endif}}
 
     {{if name != 'Object'}}