Dear Sage supporters,
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
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?
Yours,
Simon
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