On Wed, 2022-11-23 at 10:54 +0000, Harald van Dijk wrote: > With the busybox I have on my own system, I ran reproduce it with: > > busybox ash -c 'f() { echo ${PWD-${PWD!}}; }; f' > > This segfaults. Would you mind reporting this at busybox and klib-utils sh then? I mean I could do, if you want me to, ... but since this was rather found by you now, you should take the "credit". Thanks, Chris.