Hi!
I would like to create a Python class that inherits from
MPolynomialRing_libsingular, but the obvious thing to do crashes:
sage: from sage.rings.polynomial.multi_polynomial_libsingular import
MPolynomialRing_libsingular
sage: class SMF( MPolynomialRing_libsingular ): pass
sage: SMF(QQ,3,['a','b','c'])
------------------------------------------------------------------------
/home/king/Sage/git/sage/local/lib/libcsage.so(print_backtrace+0x3b)[0xb6f13c41]
/home/king/Sage/git/sage/local/lib/libcsage.so(sigdie+0x1c)[0xb6f13dcf]
/home/king/Sage/git/sage/local/lib/libcsage.so(sage_signal_handler+0x20f)[0xb6f13584]
linux-gate.so.1(__kernel_sigreturn+0x0)[0xb774d400]
/home/king/Sage/git/sage/local/lib/libsingular.so(_Z6p_NSetP7snumberP9sip_sring+0x19)[0xb2e81589]
...
Creating an extension (cdef) class inheriting from
MPolynomialRing_libsingular does work.
I don't understand what is the problem with the Python class. Please enlighten
me!
Best regards,
Simon
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