Re: [BUG] 'unset' fails silently under specific conditions

[Martijn Dekker]

Op 01-05-18 om 18:45 schreef Martijn Dekker:
> It appears that it must have one function calling another, and that 
> other function having an assignment preceding a special builtin, for 
> 'unset' to fail silently for the variable so assigned.

Actually it can be simplified further: the following also outputs "BUG: 
still set". I fact, with this version, the bug manifests all the way 
down to bash 2.05b!

POSIXLY_CORRECT=y
func() {
  var=1
  var=2 :       # or 'var=2 set foo', or another special builtin
  unset -v var  # bug: fails silently
}
func
echo ${var+"BUG: still set"}

Thanks,

- M.