On Tue, Mar 05, 2024 at 11:24:11AM +0900, John Crawley wrote: > ^ worked as a negator in dash character classes up to Bullseye though, so > something has changed recently. That's what my web searching failed to find...
It looks like dash doesn't have up-to-date documentation on its changes. There's a ChangeLog file in the upstream Git repository's top level directory[1] (shipped as changelog.gz in the Debian package), but the most recent entry in it is dated 2014-11-17. We might *guess* that this change was made to make dash more strict about POSIX minimalism (removing extensions), but without documentation we can't do more than guess about motives. [1] https://git.kernel.org/pub/scm/utils/dash/dash.git/tree/
