From 9be264795c3840701b0bd94bd114678c2fc8b904 Mon Sep 17 00:00:00 2001
From: Mauricio Collares <mauricio@collares.org>
Date: Mon, 19 Jul 2021 00:38:20 -0300
Subject: [PATCH] pynac: import segfault fix

---
 pkgs/applications/science/math/pynac/default.nix | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/pkgs/applications/science/math/pynac/default.nix b/pkgs/applications/science/math/pynac/default.nix
index 138c97d73be1..88515b92beaf 100644
--- a/pkgs/applications/science/math/pynac/default.nix
+++ b/pkgs/applications/science/math/pynac/default.nix
@@ -1,4 +1,5 @@
 { lib, stdenv
+, fetchpatch
 , fetchFromGitHub
 , autoreconfHook
 , pkg-config
@@ -20,6 +21,16 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-ocR7emXtKs+Xe2f6dh4xEDAacgiolY8mtlLnWnNBS8A=";
   };
 
+  patches = [
+    # the patch below is included in sage 9.4 and should be included
+    # in a future pynac release. see https://trac.sagemath.org/ticket/28357
+    (fetchpatch {
+      name = "realpartloop.patch";
+      url = "https://git.sagemath.org/sage.git/plain/build/pkgs/pynac/patches/realpartloop.patch?h=9.4.beta5";
+      sha256 = "sha256-1nj0xtlFN5fZKEiRLD+tiW/ZtxMQre1ziEGA0OVUGE4=";
+    })
+  ];
+
   buildInputs = [
     flint
     gmp