BUG: Series.sum on overflowing timedelta64 raises OutOfBoundsTimedelta (GH-43178)#65926
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pandas-devGH-43178) Series.sum on a timedelta64 reduction that overflowed int64 raised a plain ValueError. Raise OutOfBoundsTimedelta (a ValueError subclass) instead, matching the rest of pandas' overflow-on-timedelta behavior. Split out of pandas-devGH-65515, which also tightens timedelta64 multiplication overflow handling. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Timedelta
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Sharl0tteIsTaken
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…-comparison * upstream/main: (101 commits) TST: add regression test for non-nano datetime to_json with epoch date format (pandas-dev#65960) TST: equivalent plot frequencies render identical tick labels (GH#57587) (pandas-dev#65961) TST: x-axis labels for irregular sub-ms TimedeltaIndex plot (GH#18910) (pandas-dev#65991) TST: to_csv does not require escapechar for null byte (GH#47871) (pandas-dev#65995) TST: cut Series with NaN and integer bins (GH#55684) (pandas-dev#65998) TST: replace does not coerce np.nan to NaT (GH#48034) (pandas-dev#65999) TST: pd.NA preserved through Series.map for nullable/Arrow dtypes (GH#57390) (pandas-dev#66002) TST: read_json from binary/S3 stream with chunksize (GH#47659) (pandas-dev#66005) TST: .loc on MultiIndex with inf-bounded IntervalIndex level (GH#46699) (pandas-dev#66006) TST: read_json preserves precision of big-int string columns (GH#44684) (pandas-dev#66008) BUG: fix DataFrame.any/all(skipna=False) raising on nullable dtypes (pandas-dev#65711) BUG: Series.sum on overflowing timedelta64 raises OutOfBoundsTimedelta (pandas-devGH-43178) (pandas-dev#65926) BUG: TextReader() with no arguments segfaults (pandas-devGH-53131) (pandas-dev#65939) DOC: Add note about SQL Server temp table datetime precision loss (pandas-dev#62995) (pandas-dev#63623) DOC: correct diff result-dtype description (GH#57565) (pandas-dev#65947) TST: to_csv date_format honored for PeriodArray column (pandas-devGH-51621) (pandas-dev#65952) TST: groupby with datetime-parseable Series name (GH#51818) (pandas-dev#65953) TST: query/eval with a column named 'datetime' (pandas-devGH-35695) (pandas-dev#65967) TST: bar plot color maps per column for single-column frame (GH#18006) (pandas-dev#65971) TST: non-monotonic DatetimeIndex.get_loc raises KeyError for missing label (pandas-devGH-7827) (pandas-dev#65958) ...
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Reference GH-43178.
Split out of GH-65515. This is the standalone, pure-Python half of that PR; GH-65515 retains the
closes #43178line since it also fixes the multiplication overflow.Summary
Series.sumon atimedelta64reduction that overflows int64 raised a plainValueError. It now raises :class:OutOfBoundsTimedelta(aValueErrorsubclass), matching the rest of pandas' overflow-on-timedelta behavior. Because the new exception is aValueErrorsubclass, existing code that caughtValueErroris unaffected.Test plan
test_td64_summation_overflowto expectOutOfBoundsTimedeltapandas/tests/series/test_reductions.py,pandas/tests/test_nanops.py,pandas/tests/reductions/pass locally🤖 Generated with Claude Code