On Tue, 8 Aug 2023, 23:24 Zachary Santer, <zsan...@gmail.com> wrote: > Description: > Similarly, history expansion occurs within arithmetic substitutions. This > will never, ever be what the user wants.
Correction: it will never ever be what YOU want. I can certainly think of uses for history expansion in arithmetic context, for example (imagine this done with much bigger numbers): $ coprimepairs 7 9 32 48 7 9 7 32 9 32 $ echo $(( !:2 * !:3 )) echo $(( 9 * 32 )) 288 $ If anyone wants to avoid such history expansion, that's easy: always put spaces around operators in arithmetic context. I would recommend turning on histreedit, so that it's less cumbersome to fix any unexpected history expansions. $ echo $(( ! 0 )) 1 $ Please don't go breaking existing functionality just because someone can't imagine a use for it. -Martin
