On 2016/02/15 21:33, Ashutosh Bapat wrote:
Here's patch with better way to fix it. I think while concatenating the
lists, we need to copy the lists being appended and in all the cases. If
we don't copy, a change in those lists can cause changes in the upward
linkages and thus lists of any higher level joins.

Maybe I'm missing something, but I don't understand why such a change in those lists happens. Could you explain about that in more detail?

Best regards,
Etsuro Fujita

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