From f81ae8d5e50a01a3e4237aff55d79ff3c52524c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 10 May 2017 15:19:47 +0200
Subject: [PATCH] [apps/sequence] Avoid infinite loop

Change-Id: Ib84ce244c8faeabc9d71bccd590b3a242cef184c
---
 apps/sequence/sequence.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 00805da3f..b9951ca58 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -309,6 +309,11 @@ float Sequence::sumOfTermsBetweenAbscissa(float start, float end, Context * cont
     return NAN;
   }
   for (float i = roundf(start); i <= roundf(end); i = i + 1.0f) {
+    /* When |start| >> 1.0f, start + 1.0f = start. In that case, quit the
+     * infinite loop. */
+    if (i == i-1.0f || i == i+1.0f) {
+      return NAN;
+    }
     result += evaluateAtAbscissa(i, context);
   }
   return result;