inconsistend behaviour of intvecs if stored as list elements

[ren]

ren@mandelbrot:~/Sources2/Singular$ ./Singular 
                     SINGULAR                                 /  Development
 A Computer Algebra System for Polynomial Computations       /   version 4.0.1
                                                           0<
 by: W. Decker, G.-M. Greuel, G. Pfister, H. Schoenemann     \   Sep 2014
FB Mathematik der Universitaet, D-67653 Kaiserslautern        \
// ** executing /home/ren/Sources2/Singular/LIB/.singularrc
> intvec v=1,2,3;
> v = 0,v;
> v;
0,1,2,3
> list L = intvec(1,2,3);
> L[1] = 0,L[1];
   ? assign not impl.
   ? error occurred in or before STDIN line 7: `L[1] = 0,L[1];`

[hannes]

Not so easy: in the first case v is an intvec, so this is an assignment of a list of (int,intvec) to an intvec. In the second case L[1] is untyped, so is is an assignment of a list (i,iv) to def.

To solve it, use c268ebdb845b116662ce209cd17398864b707404 together with an explicit conversion to intvec:

list L=intvec(1,2,3);
L[1]=intvec(0,L[1]);

should now work.