Please test pari-2.11.4 prerelease 1

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

Dear PARI developers,

We have made available a prerelease of PARI 2.11.4 (stable).

Among others fixes, this release fixes a regression in the bnfisunit
code introduced in 2.11.3. It also fixes some potential race condition with the
pthread code.

Please test there are no regressions.

The expected release date is set to the 17/04/2020.

Please test the prerelease tarball:
<https://pari.math.u-bordeaux.fr/pub/pari/snapshots/pari-2.11.4-pre1.tar.gz>

The digital signature is 
<https://pari.math.u-bordeaux.fr/pub/pari/snapshots/pari-2.11.4-pre1.tar.gz.asc>

Please test the 64bit windows installer:
<https://pari.math.u-bordeaux.fr/pub/pari/windows/snapshots/Pari64-2.11.4-pre1.exe>

I have also built the 32bit Windows installer:
<https://pari.math.u-bordeaux.fr/pub/pari/windows/snapshots/Pari32-2.11.4-pre1.exe>

and the following standalone Windows binaries:

32bit 
<https://pari.math.u-bordeaux.fr/pub/pari/windows/snapshots/gp32-2.11.4-pre1.exe>
<https://pari.math.u-bordeaux.fr/pub/pari/windows/snapshots/gp32-readline-2.11.4-pre1.exe>

64bit
<https://pari.math.u-bordeaux.fr/pub/pari/windows/snapshots/gp64-2.11.4-pre1.exe>
<https://pari.math.u-bordeaux.fr/pub/pari/windows/snapshots/gp64-readline-2.11.4-pre1.exe>

64bit, multithreaded
<https://pari.math.u-bordeaux.fr/pub/pari/windows/snapshots/gppthread64-2.11.4-pre1.exe>
<https://pari.math.u-bordeaux.fr/pub/pari/windows/snapshots/gppthread64-readline-2.11.4-pre1.exe>

and the following MacOS DMG:

<https://pari.math.u-bordeaux.fr/pub/pari/mac/snapshots/PariGP-2.11.4-pre1.dmg>
<https://pari.math.u-bordeaux.fr/pub/pari/mac/snapshots/PariGP-2.11.4-pre1-pthread.dmg>
<https://pari.math.u-bordeaux.fr/pub/pari/mac/snapshots/PariGP-full-2.11.4-pre1.dmg>
<https://pari.math.u-bordeaux.fr/pub/pari/mac/snapshots/PariGP-full-2.11.4-pre1-pthread.dmg>

and the following MacOS stand-alone binaries:
<https://pari.math.u-bordeaux.fr/pub/pari/mac/snapshots/gp-2.11.4-pre1-osx>
<https://pari.math.u-bordeaux.fr/pub/pari/mac/snapshots/gp-2.11.4-pre1-pthread-osx>

The changelog:

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

  Fixed
    1- [from 2.11.3] bnfisunit could return wrong sign [#2208]
BA  2- factor((x-1)*(x-y)^2) --> oo-loop                                   [F62]
BA  3- ellap could fail with division by 0                                 [F63]
    4- wrong results in bnfsunit [#2207]                                   [F64]
    5- problems with gequal(t_SER or t_POL with inexact coefs or constant  [F65]
        wrt. some variables). E.g. S=x+O(x^2);T=S+O(y); S == T -> 0 [#2188]
MW  6- mateigen would sometime return eigenvalues instead of eigenvectors  [F67]
AE  7- [libpari] FpX_oneroot_split could fail for deg 2 and 3.             [F68]
BA  8- [pthread] Fix potential crashes when cancelling threads.            [F69]

On behalf of the PARI group,
Bill and Karim