From 80c03220dd10ddf1d2bdadc55b240b8a4dc03c5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 20 Feb 2020 11:38:02 +0100
Subject: [PATCH] [poincare/function] Fix getVariables

Faulty scenario:
Equation x+y=f(0) without defining any variable
---
 poincare/src/function.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poincare/src/function.cpp b/poincare/src/function.cpp
index 8f0a325b5..90ec61731 100644
--- a/poincare/src/function.cpp
+++ b/poincare/src/function.cpp
@@ -39,7 +39,7 @@ int FunctionNode::getVariables(Context * context, isVariableTest isVariable, cha
   Function f(this);
   Expression e = SymbolAbstract::Expand(f, context, true);
   if (e.isUninitialized()) {
-    return 0;
+    return nextVariableIndex;
   }
   return e.node()->getVariables(context, isVariable, variables, maxSizeVariable, nextVariableIndex);
 }