[Bug 12981] awk: seems to try to falsely expand strings

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=12981

Bernhard Reutner-Fischer <aldot at uclibc.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P5                          |P2
                 CC|                            |aldot at uclibc.org

--- Comment #6 from Bernhard Reutner-Fischer <aldot at uclibc.org> ---
(In reply to Steffen Nurpmeso from comment #5)

>  >   Also, i think that you should put parentheses around the
>  >   ++unavail in your original code since there is no defined
>  >   precenence around string concatenation.
>  >
>  > This is for the snippet
>  >
>  >                ia[1] = "(su__ERR_NUMBER_MAX - " ++unavail ")"
>
>  I think he's wrong.  The ++unavail would have to be done before
>  converting the result to string for the concatentation.

yes, which you can enforce explicitly by adding parenthesis.

I looked a bit into our awk implementation yesterday but i'm not yet sure how
to fix it properly.
We indeed end up calling setvar_i on the lefthand string to set it's number to
0, which clears the string-value of the node. This is of course not what we
want, and is the cause of the "01" output.

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