On Tue, Mar 16, 2021 at 8:12 AM Chet Ramey <chet.ra...@case.edu> wrote: > This means that, given the following script, > > declare -A a > key='$(echo foo)' > a[$key]=1 > a['$key']=2 > a["foo"]=3 > > # never worked > unset -v a[$key] > declare -p a > > # unsets element with key $key > unset -v a['$key'] > declare -p a > > # unsets element with key $(echo foo) > unset -v a["$key"] > declare -p a > > # unsets element with key foo > eval unset -v a\["$key"\] > declare -p a > > you'll get this output: > > example: line 8: unset: `a[$(echo': not a valid identifier > example: line 8: unset: `foo)]': not a valid identifier > declare -A a=(["\$(echo foo)"]="1" ["\$key"]="2" [foo]="3" ) > declare -A a=(["\$(echo foo)"]="1" [foo]="3" ) > declare -A a=([foo]="3" ) > declare -A a=()
As I've observed, in single expansion mode, unset will fail to unset a value when the key has a closing bracket in it. Perhaps unset should check the last character first when looking for the closing bracket. Tested in 5.1.4. -- konsolebox
