From 86409c771a0f69455c4e8a0afd5ea4aa7cb9c153 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 13 Dec 2018 12:22:16 +0100
Subject: [PATCH] [poincare/expression] Add escape case on uninitialized
 expression

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

diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 99a630389..9dd4ee761 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -428,6 +428,9 @@ U Expression::approximateToScalar(Context& context, Preferences::AngleUnit angle
 template<typename U>
 U Expression::approximateToScalar(const char * text, Context& context, Preferences::AngleUnit angleUnit) {
   Expression exp = ParseAndSimplify(text, context, angleUnit);
+  if (exp.isUninitialized()) {
+    return NAN;
+  }
   return exp.approximateToScalar<U>(context, angleUnit);
 }