From cdbcc3c6bca69859d025d16ee82386b924678935 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 2 Aug 2019 11:29:59 +0200
Subject: [PATCH] [poincare/matrix_identity] Fix shallowReduce

---
 poincare/src/matrix_identity.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/poincare/src/matrix_identity.cpp b/poincare/src/matrix_identity.cpp
index c015030d8..6cadf5968 100644
--- a/poincare/src/matrix_identity.cpp
+++ b/poincare/src/matrix_identity.cpp
@@ -49,7 +49,9 @@ Expression MatrixIdentity::shallowReduce(ExpressionNode::ReductionContext reduct
     }
   }
   Expression c = childAtIndex(0);
-  if (!c.isRationalOne()) {
+  if (c.type() != ExpressionNode::Type::Rational
+      || !static_cast<Rational&>(c).isInteger())
+  {
     return replaceWithUndefinedInPlace();
   }
   Integer dimension = static_cast<Rational &>(c).signedIntegerNumerator();