BUG: catch out-of-bounds datetime64 in Series/DataFrame constructor

Author: jorisvandenbossche

pandas/core/dtypes/cast.py

@@ -1063,7 +1063,7 @@ def maybe_cast_to_datetime(value, dtype, errors='raise'):
             dtype = value.dtype
 
             if dtype.kind == 'M' and dtype != _NS_DTYPE:
-                value = value.astype(_NS_DTYPE)
+                value = tslibs.conversion.ensure_datetime64ns(value)
 
             elif dtype.kind == 'm' and dtype != _TD_DTYPE:
                 value = to_timedelta(value)

pandas/core/internals/construction.py

@@ -8,7 +8,7 @@
 import numpy.ma as ma
 
 from pandas._libs import lib
-from pandas._libs.tslibs import IncompatibleFrequency
+from pandas._libs.tslibs import IncompatibleFrequency, OutOfBoundsDatetime
 from pandas.compat import raise_with_traceback
 
 from pandas.core.dtypes.cast import (
@@ -701,6 +701,9 @@ def _try_cast(arr, take_fast_path, dtype, copy, raise_cast_failure):
         elif not is_extension_type(subarr):
             subarr = construct_1d_ndarray_preserving_na(subarr, dtype,
                                                         copy=copy)
+    except OutOfBoundsDatetime:
+        if raise_cast_failure:
+            raise
     except (ValueError, TypeError):
         if is_categorical_dtype(dtype):
             # We *do* allow casting to categorical, since we know

pandas/tests/series/test_constructors.py

@@ -909,6 +909,11 @@ def test_constructor_with_naive_string_and_datetimetz_dtype(self, arg):
         expected = Series(pd.Timestamp(arg)).dt.tz_localize('CET')
         assert_series_equal(result, expected)
 
+    def test_constructor_datetime64_outofbound(self):
+        # GH-26206 out of bound non-ns unit
+        with pytest.raises(pd.errors.OutOfBoundsDatetime):
+            pd.Series(np.array(['2262-04-12'], dtype='datetime64[D]'))
+
     def test_construction_interval(self):
         # construction from interval & array of intervals
         index = IntervalIndex.from_breaks(np.arange(3), closed='right')