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author	Collin Funk <collin.funk1@gmail.com>
	Tue, 16 Sep 2025 03:53:23 +0000 (20:53 -0700)
committer	Collin Funk <collin.funk1@gmail.com>
	Tue, 16 Sep 2025 03:55:56 +0000 (20:55 -0700)
commit	98e5418a38fa8e944d5b694ba2aa0c165092e63b
tree	8f0d2a184ec02ccee303cf0c3b2baef78790808b	tree \| snapshot
parent	8339970b155d6d3ed5623325bb577b29b59948d6	commit \| diff

fold: fix out of bounds write with zero width characters

* src/fold.c (fold_file): Prefer putchar ('\n') to copying characters.
If we do not have room in the output buffer print it since it is not a
full line of text.
* tests/fold/fold-zero-width.sh: New test case.
* tests/local.mk (all_tests): Add it.

src/fold.c		diff \| blob \| blame \| history
tests/fold/fold-zero-width.sh	[new file with mode: 0755]	blob
tests/local.mk		diff \| blob \| blame \| history

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