gentoo auto-resync : 26:01:2023 - 19:56:42

2 files changed, 34 insertions, 22 deletions

diff --git a/sci-mathematics/pari/files/pari-2.15.2-ellsea-r1.patch b/sci-mathematics/pari/files/pari-2.15.2-ellsea-r1.patch
new file mode 100644
index 000000000000..b8af421c0e56
--- /dev/null
+++ b/sci-mathematics/pari/files/pari-2.15.2-ellsea-r1.patch
@@ -0,0 +1,34 @@
+A fix for upstream bug 2441 and gentoo bug 892035, with the changes to
+CHANGES and the test suite stripped out (they don't apply cleanly).
+
+From 6f556664bea5dae9d7101533be65f10b9d6332e2 Mon Sep 17 00:00:00 2001
+From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>
+Date: Fri, 20 Jan 2023 11:13:46 +0100
+Subject: [PATCH 1/1] ellcard(ellinit([1,1]*ffgen([41,16])))-> impossible
+ inverse [#2441]
+
+find_isogenous_from_Atkin: check that the kernel divides the division polynomial
+---
+ CHANGES               | 1 +
+ src/basemath/ellsea.c | 3 ++-
+ src/test/32/ellff     | 3 ++-
+ src/test/in/ellff     | 3 +++
+ 4 files changed, 8 insertions(+), 2 deletions(-)
+
+diff --git a/src/basemath/ellsea.c b/src/basemath/ellsea.c
+index a6871fa6a7..05f148eadd 100644
+--- a/src/basemath/ellsea.c
++++ b/src/basemath/ellsea.c
+@@ -852,7 +852,8 @@ find_isogenous_from_Atkin(GEN a4, GEN a6, ulong ell, struct meqn *MEQN, GEN g, G
+       GEN a4t, a6t, h;
+       a4a6t(&a4t, &a6t, ell, E4t, E6t, T, p);
+       h = find_kernel(a4, a6, ell, a4t, a6t, pp1, T, p, pp, e);
+-      if (h) return gerepilecopy(ltop, mkvec3(a4t, a6t, h));
++      if (h && signe(Fq_elldivpolmod(a4, a6, ell, h, T, pp))==0)
++        return gerepilecopy(ltop, mkvec3(a4t, a6t, h));
+     }
+   }
+   pari_err_BUG("find_isogenous_from_Atkin, kernel not found");
+-- 
+2.30.2
+
diff --git a/sci-mathematics/pari/files/pari-2.15.2-ellsea.patch b/sci-mathematics/pari/files/pari-2.15.2-ellsea.patch
deleted file mode 100644
index a5c19504ea87..000000000000
--- a/sci-mathematics/pari/files/pari-2.15.2-ellsea.patch
+++ /dev/null
@@ -1,22 +0,0 @@
-# upstream bug https://pari.math.u-bordeaux.fr/cgi-bin/bugreport.cgi?bug=2441
-# will be fixed in 2.15.3
-diff --git a/src/basemath/ellsea.c b/src/basemath/ellsea.c
-index a6871fa6a7..f1e725ea55 100644
---- a/src/basemath/ellsea.c
-+++ b/src/basemath/ellsea.c
-@@ -1303,6 +1303,7 @@ find_trace_Elkies_power(GEN a4, GEN a6, ulong ell, long *pt_k, struct meqn *MEQN
-   lambda = tr ? find_eigen_value_oneroot(a4, a6, ell, tr, kpoly, T, p):
-                 find_eigen_value_power(a4, a6, ell, 1, 1, kpoly, T, p);
-   if (DEBUGLEVEL>1) err_printf(" [%ld ms]", timer_delay(ti));
-+  if (lambda==ell) return NULL;
-   if (smallfact && smallfact%(long)ell!=0)
-   {
-     ulong pell = pellk%ell;
-@@ -1317,6 +1318,7 @@ find_trace_Elkies_power(GEN a4, GEN a6, ulong ell, long *pt_k, struct meqn *MEQN
-     if (!tmp) { k = cnt-1; break; }
-     if (DEBUGLEVEL) err_printf(", %Ps", powuu(ell, cnt));
-     lambda = find_eigen_value_power(a4, a6, ell, cnt, lambda, gel(tmp,3), T, p);
-+    if (lambda == upowuu(ell, cnt)) { k = cnt-1; break; }
-     Eba4 = Eca4;
-     Eba6 = Eca6;
-     Eca4 = gel(tmp,1);