Bug numbers refer to the BTS at http://pari.math.u-bordeaux.fr/Bugs/
Done for version 2.19.0 (released 28/09/2026):
  Fixed
     1- bestappr(-1/7, 6) -> 0 [instead of -1/6]
     2- abs(t_QUAD) would not return exact answer even if possible
     3- polredbest(x^3-2*x+1) -> SEGV [#2689]
     4- mflinear(MF in half integer weight, coefs in Q(chi)): wrong result
BA   5- ellisdivisible: potential oo-loop [#2695]
BA   6- bnrL1(,,0) over imaginary quadratic fields was wrong [#2693]
     7- matmodhnf: incorrect handling of empty matrix [#2699]
BA   8- ellisomat/nf could fail with CM curves
BA   9- polsubcyclofast(58,7) -> []
    10- factorpadic(1+O(3)*x^2,3,2) -> SEGV [#2701]
    11- bnfcertify and c_2 phase ("be honest") in bnfinit incorrectly skipped
        part of the checks in degree > 2.
BA  12- trace(Mod(x, Mod(1,2)*(x^2+x+1))) -> 0 [#2702]

  Added
     1- [libpari] QM_ishnf
     2- [libpari] fractor_lg, itor_lg, rdivii_lg, rtor_lg, stor_lg, utor_lg
     3- [libpari] ZX_realroots, ZX_nf_roots
     4- znorder: allow a znstar for the 'order' optional argument
     5- allow lfunqf(t_VEC) for lfunqf(matdiagonal(...))
     6- [libpari] vandermondeinverseinit_real
BA   7- New GP function galoisorder
BA   8- [libpari] group_istrivial, groupgen_export, groupelts_gen, group_iswss
BA   8- [libpari] group_istrivial, groupgen_export, groupelts_gen
BA   9- galoisidentify: support for groups of order <= 191
BA  10- [libpari] divisors_fact_degmax
    11- [libpari] prime_over_p_full

  Removed
     1- real_1_bit: use real_1
     2- group_export_GAP, group_export_MAGMA: use group_export
     3- [libpari] functions push_localprec, pop_localprec, get_localprec

  Changed
     1- bestappr(t_REAL) now choses B = 2^((realprec(x) + 1) \ 2) instead of
        2^realprec(x).
     2- [libpari] rename real_0_bit -> real_0_expo
     3- speed up numbpart
     4- '?' now prints a short introduction, move the list of help
        sections to '?*'
     5- allow arbitrary separable (rational) polynomials in the polred*
        family of functions. Don't assume irreducibility [#2689]
     6- readline completion: don't include yet undefined symbols
BA   7- group_ident, group_ident_trans, checkgroup: remove parameter S
BA   8- groupelts_to_group: if not WSS, return elts instead of NULL
     9- [libpari] The concept of a 'prec' (attached to the precision
        of a t_REAL) is now obsolete. Any positive integer is now a valid
        precision. The following utility functions have been deprecated
        bit_prec: use realprec
        lg2prec: use bit_accuracy
        nbits2extraprec: use nbits2prec
        ndec2nbits: use ndec2prec
        prec2ndec: use nbits2ndec
        prec2lg: use nbits2lg
