On 05/08/2017 01:23 PM, John Cowan wrote:
>
> On Mon, May 8, 2017 at 3:55 PM, Per Bothner <xxxxxx@bothner.com <mailto:xxxxxx@bothner.com>> wrote:
>
>     (though I took the liberty
>     renaming the variables in a way I like better).
>
>
> Doing that makes it hard to see where the substantive change is.  Please provide a simpler patch without variable renaming.

The substantive patch *is* variable renaming.
The bug in the original was two different variables with the same name (list-b),
and the inner one hiding the outer one.

I just used used different names than Peter did.
--
	--Per Bothner
xxxxxx@bothner.com   http://per.bothner.com/