On Mon, Feb 12, 2018 at 2:45 PM, Nikolai Kondrashov <spbn...@gmail.com>
wrote:

> On 02/12/2018 08:41 AM, Nikolai Kondrashov wrote:
>
>>      inner() {
>>          unset res
>>
>
> Oh, and duplicating this line fixes the issue.
>

Take a look at these links:

 - http://wiki.bash-hackers.org/commands/builtin/unset
 - http://www.fvue.nl/wiki/Bash:_Passing_variables_by_reference

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