tthsqe12 / singularinterpreter Goto Github PK
View Code? Open in Web Editor NEWsingular -> julia
singular -> julia
The following code is usual when one want's to use a ring R in libsingular.
S = currRing;
rChangeCurrRing(R);
...do your stuff with R...
rChangeCurrRing(S); <----- crash here
The problem happens when somewhere someone does not follow this convention and leaves libsingular's currRing pointing to a ring R' after they are done. If R' gets gc'd the memory is junk and S now gets the junky ring R' in the above code. This crashes because rChangeCurrRing is a non-trivial function.
Are we able to always restore the currRing after using it? If not, then we have to forget about restoring it everywhere. This would lead to a another headache of determining if a function call is going to change the currRing.
ahh, singular's currRing........
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