From fe0904cd8c2746ae74239bc2b2b26d5753cfd3dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 20 Aug 2019 11:51:30 +0200
Subject: [PATCH] [poincare/matrix_id] If child not rational, return this in
 shallowRed

Example: matrix_identity(cosh(0))
---
 poincare/src/matrix_identity.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poincare/src/matrix_identity.cpp b/poincare/src/matrix_identity.cpp
index a20c64a25..56c637085 100644
--- a/poincare/src/matrix_identity.cpp
+++ b/poincare/src/matrix_identity.cpp
@@ -52,7 +52,7 @@ Expression MatrixIdentity::shallowReduce(ExpressionNode::ReductionContext reduct
   if (c.type() != ExpressionNode::Type::Rational
       || !static_cast<Rational&>(c).isInteger())
   {
-    return replaceWithUndefinedInPlace(); // TODO: are we sure?
+    return *this;
   }
   Integer dimension = static_cast<Rational &>(c).signedIntegerNumerator();
   if (dimension.isNegative()) {