polynomials with %nan coefficients : %nan ignored (considered as 0)
Reported by Alain Lamy
BUG DESCRIPTION:
----------------
// In the following expressions, %nan is considered as 0 (NOT OK)
-->p = %nan + %z
p =
z
-->p = 1 + %nan * %z
p =
1
-->p = %nan + 0 * %z
p =
0
-->p = %nan + %nan * %z
p =
0
// But:
// in the following equivalent expressions, %nan is considered as %nan (OK)
-->p = poly([%nan], "z", "coeff")
p =
Nan
-->p = poly([%nan, %nan], "z", "coeff")
p =
Nan + Nanz