BUG: add bounds-checking to in-place string multiply #29074
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* BUG: add bounds-checking to in-place string multiply * MNT: check for overflow and raise OverflowError * MNT: respond to review suggestion * MNT: handle overflow in one more spot * MNT: make test behave the same on all architectures * MNT: reorder to avoid work in some cases
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Backport of #29060.
Fixes #29011.
Re-do of #29056 without any backwards-incompatible changes.
Adds bounds-checking to the string multiply core, since in-place multiply via
*=can bypass the code that constructs output buffers innp.strings.multiply.BUG: add bounds-checking to in-place string multiply
MNT: check for overflow and raise OverflowError
MNT: respond to review suggestion
MNT: handle overflow in one more spot
MNT: make test behave the same on all architectures
MNT: reorder to avoid work in some cases