Hello,

since I changed to version 4.3.2 it seems that calling associated_primes() on 
an ideal of a polynomial ring that has term order 'invlex' is broken.

Example:
sage: R.<x,y>=PolynomialRing(QQ,2,order='invlex')
sage: R.ideal(x).associated_primes()
? // Not implemented for this ordering, please change to global
ordering.
   ? leaving primdec.lib::primdecSY
Traceback (click to the left of this block for traceback)
...
RuntimeError

It used to work fine with prior versions. Is this an intended change?

Also, it seems that this leaves the spawned singular process in a broken state 
as all subsequent ideal operations (e.g. simple membership tests) will fail 
until the worksheet is restarted.

Stefan

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