From 8f58f20945237df2f4b35373200b9c60345769c2 Mon Sep 17 00:00:00 2001
From: Wouter Deconinck <wouter.deconinck@umanitoba.ca>
Date: Tue, 3 Aug 2021 00:12:38 +0000
Subject: [PATCH] printf %lu for unsigned long aka size_t

---
 src/BarrelCalorimeterInterlayers_geo.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/BarrelCalorimeterInterlayers_geo.cpp b/src/BarrelCalorimeterInterlayers_geo.cpp
index cd5270ea..d3ed41c6 100644
--- a/src/BarrelCalorimeterInterlayers_geo.cpp
+++ b/src/BarrelCalorimeterInterlayers_geo.cpp
@@ -205,7 +205,7 @@ void buildFibers(Detector& desc, SensitiveDetector &sens, Volume &s_vol, xml_com
     }
     double l_pos_y = line.front().y();
     // use assembly as intermediate volume container to reduce number of daughter volumes
-    Assembly lfibers(Form("fiber_array_line_%d", il));
+    Assembly lfibers(Form("fiber_array_line_%lu", il));
     for (auto &p : line) {
       int f_grid_id = -1;
       int f_id = -1;
-- 
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