From 2bd93844cded35116c8ff4a70db09137e3bc6b7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 22 May 2018 13:48:31 +0200
Subject: [PATCH] [poincare] Bug Product([1 1], 1, 3): if the intermediate
 result is nullptr, escape the evaluation and return an undefined expression

---
 poincare/src/sequence.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/poincare/src/sequence.cpp b/poincare/src/sequence.cpp
index 00f48111b..07aeb5159 100644
--- a/poincare/src/sequence.cpp
+++ b/poincare/src/sequence.cpp
@@ -43,6 +43,9 @@ Expression * Sequence::templatedApproximate(Context& context, AngleUnit angleUni
     delete result;
     delete expression;
     result = newResult;
+    if (result == nullptr) {
+      return new Complex<T>(Complex<T>::Float(NAN));
+    }
   }
   return result;
 }