From 5a644be956c60c53423f2be50948484d7d42c2f5 Mon Sep 17 00:00:00 2001
From: mmd <mmd-osm@users.noreply.github.com>
Date: Thu, 1 Apr 2021 13:24:27 +0200
Subject: [PATCH] Avoid reading from empty sparseBlock

Fixes #1442
---
 src/node-ram-cache.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/node-ram-cache.cpp b/src/node-ram-cache.cpp
index 2cc2ee168..583afd64b 100644
--- a/src/node-ram-cache.cpp
+++ b/src/node-ram-cache.cpp
@@ -263,6 +263,10 @@ void node_ram_cache::set_dense(osmid_t id, osmium::Location location)
 
 osmium::Location node_ram_cache::get_sparse(osmid_t id) const
 {
+    if (sizeSparseTuples == 0) {
+        return osmium::Location{};
+    }
+
     int64_t pivotPos = sizeSparseTuples >> 1;
     int64_t minPos = 0;
     int64_t maxPos = sizeSparseTuples;