fix(str): reject a negative width or length in zfill, pad_start and pad_end - #3770

Open

mkzung wants to merge 7 commits into

narwhals-dev:mainfrom

mkzung:fix/zfill-nonpositive-width

Commits on Aug 3, 2026

fix(pyarrow): handle non-positive width in str.zfill
mkzung
committed
cf782aa
fix(str): reject a negative zfill width in the public layer
mkzung
committed
01f642d
fix(str): reject a negative pad_start/pad_end length too
mkzung
committed
04bbfe5
fix(str): match the existing wording for a non-negative argument
mkzung
committed
18533fc
say why the message is pinned, and stop repeating the same note
mkzung
committed
11a11dd
refactor(str): extract validate_width and widen the zero-width test
mkzung
committed
c0103c1

Commits on Aug 4, 2026

fix(polars): keep the plus-sign branch valid at width zero
mkzung
committed
cdbfc64