From 3b216f5fdbfb3c7da85dc7bd2278b9038b105284 Mon Sep 17 00:00:00 2001
From: Ivan Krylov <krylov.r00t@gmail.com>
Date: Fri, 26 Apr 2019 18:45:00 +0300
Subject: [PATCH] praxis: handle xtol_abs == NULL

---
 src/algs/praxis/praxis.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/algs/praxis/praxis.c b/src/algs/praxis/praxis.c
index e6ce82e3..9d664419 100644
--- a/src/algs/praxis/praxis.c
+++ b/src/algs/praxis/praxis.c
@@ -189,7 +189,8 @@ nlopt_result praxis_(double t0, double machep, double h0,
 	 t_old = small + t0;
     else {
 	 t_old = 0;
-	 for (i__ = 0; i__ < n; ++i__)
+	 if (stop->xtol_abs)
+	  for (i__ = 0; i__ < n; ++i__)
 	      if (stop->xtol_abs[i__] > t_old)
 		   t_old = stop->xtol_abs[i__];
 	 t_old += small;