From 8f9f1cf44eaeb860f845c8df80c2044e4ede9a79 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juraj=20Or=C5=A1uli=C4=87?= <juraj.orsulic@fer.hr>
Date: Thu, 23 Nov 2017 14:20:01 +0100
Subject: [PATCH] Fix debug build (#697)

Similar to #418.
---
 cartographer/io/probability_grid_points_processor.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cartographer/io/probability_grid_points_processor.cc b/cartographer/io/probability_grid_points_processor.cc
index 20f3bfb..12c856d 100644
--- a/cartographer/io/probability_grid_points_processor.cc
+++ b/cartographer/io/probability_grid_points_processor.cc
@@ -118,6 +118,9 @@ PointsProcessor::FlushResult ProbabilityGridPointsProcessor::Flush() {
       return FlushResult::kFinished;
   }
   LOG(FATAL);
+  // The following unreachable return statement is needed to avoid a GCC bug
+  // described at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81508
+  return FlushResult::kFinished;
 }
 
 std::unique_ptr<Image> DrawProbabilityGrid(