From 9e0f7bedd46886aa07a768bd6bcb00630c5e1dfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 30 May 2018 10:31:11 +0200
Subject: [PATCH] [poincare] Rational Power: always reduce p^(-1) if p rational

Otherwise, it causes bug when trying to reduce to same denominator.
For example:
  In Calculation app, type:
    '6' OK,
    'Y-ans/(ans*ans*ans*ans*ans), OK
    OK
    OK
    OK
 --> crash
---
 poincare/src/power.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/poincare/src/power.cpp b/poincare/src/power.cpp
index 6531d27d6..49f9504c5 100644
--- a/poincare/src/power.cpp
+++ b/poincare/src/power.cpp
@@ -821,6 +821,9 @@ bool Power::isNthRootOfUnity() const {
 }
 
 bool Power::RationalExponentShouldNotBeReduced(const Rational * b, const Rational * r) {
+  if (r->isMinusOne()) {
+    return false;
+  }
   /* We check that the simplification does not involve too complex power of
    * integers (ie 3^999, 120232323232^50) that would take too much time to
    * compute: