On Thu, Jul 31, 2025 at 12:58:57 +0200, Phi Debian wrote: > ksh93 always treats cd "$undefined" as an error, this is true but the error > is not related to cd > ==== > TC$ echo $KSH_VERSION > Version AJM 93u+m/1.1.0-alpha+11981f5f/MOD 2025-06-22 > TC$ cd $Undefined > ./arch/linux.i386-64/bin/ksh: Undefined: parameter not set > TC$ cd "$Undefined" > ./arch/linux.i386-64/bin/ksh: Undefined: parameter not set > ====
You seem to have the set -u option turned on for some reason. hobbit:~$ ksh $ echo "$KSH_VERSION" Version AJM 93u+m/1.0.4 2022-10-22 $ echo $undefined $ cd $undefined $ set -u $ echo $undefined ksh: undefined: parameter not set $ cd $undefined ksh: undefined: parameter not set In order to get the expected error, you would have to turn off set -u and quote properly: $ set +u $ cd "$undefined" ksh: cd: bad directory
