Simon King wrote:
> Dear Sage supporters,

Hi,

> as usual, I messed up some Cython module. There was no complaint when
> I included it, but when I called some constructor, I got three times
> the line
>   Warning sND: Backtracking

We have backtracking code, but grepping around does not reveal
anything related to "sND"

> Then, Sage did not react on Ctrl-C. But it was running with almost
> 100% CPU time. I had to kill it.
>
> What does that Warning mean, and is there a typical reason for the
> error?

Without any specifics it seems pointless to speculate. I have never
seen this or anything even remotely close before. What are you doing
with "some Cython module"? It sounds very much like it is something in
your code.

> Yours,
>     Simon

Cheers,

Michael
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