Bug numbers refer to the BTS at http://pari.math.u-bordeaux.fr/Bugs/

Done for version 2.20.0 (released ??/??/2027):

Fixed
BA   1- z=ffgen(23^3,'z);hyperellcharpoly(t^3+z*t+4) -> SEGV [#2703]
     2- localbitprec(53); lfun(ellinit([1,2]), 100) -> FPE [#2704]
BA   3- rnfisabelian could return wrong result for complex fields [#2707]
     4- nfislocalpower: error when argument not an algebraic integer
     5- x==0 incorrect for t_COMPLEX x (defined as |x| == 0)
     6- logint(t_REAL, 2, &z); z was uninitialized

Added
