Bug#805264: What I expected to to happen with gmpy2.mpz/gmpy2.xmpz

[David George Henderson III]

What I'm attempting to do is perform a dot product of an int32 array 
with a list of mpz integers.

z=np.zeros(10,np.int32)
y=[gmpy.mpz[1] *10 ]
summation = gmp.xmpz(0)
for i in range(0,10):
    product = gmpy2.xmpz(z[i])
    product *= y[i]
    summation += product

The bug prevents this from running.

My workaround defeats the purpose of using gmpy2.xmpz typed variables :

for i in range(0,10):
    product = gmpy2.xmpz(int(z[i]))