From bc42fb4a40d1198b658c30510c2d907f0776efec Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Tue, 28 Oct 2025 12:13:46 +0100
Subject: [PATCH] set the default random

---
 .../Thingi10k-CDT.cmake                       | 89 +++++++++++++++++++
 .../cdt_3_from_off.cpp                        |  2 +
 2 files changed, 91 insertions(+)

diff --git a/Constrained_triangulation_3/test/Constrained_triangulation_3/Thingi10k-CDT.cmake b/Constrained_triangulation_3/test/Constrained_triangulation_3/Thingi10k-CDT.cmake
index fc072a5f1d7..f37a6708c88 100644
--- a/Constrained_triangulation_3/test/Constrained_triangulation_3/Thingi10k-CDT.cmake
+++ b/Constrained_triangulation_3/test/Constrained_triangulation_3/Thingi10k-CDT.cmake
@@ -118,6 +118,92 @@ set(thingi10k_FAILED_WITH_SEGFAULT_CTest_20251002
 822697.stl
 )
 
+set(thingi10k_FAILED_WITH_MERGE_FACETS_CTest_20251028
+139765.stl
+1452677.stl
+1452678.stl
+1452679.stl
+145329.stl
+145330.stl
+145331.stl
+1505036.stl
+1514900.stl
+153100.stl
+1652975.stl
+1652976.stl
+1706457.stl
+186546.stl
+196121.stl
+196122.stl
+196123.stl
+196126.stl
+196127.stl
+196194.stl
+199814.stl
+199818.stl
+206318.stl
+215991.stl
+230152.stl
+230153.stl
+237632.stl
+239188.stl
+255657.stl
+255658.stl
+276937.stl
+285603.stl
+286161.stl
+288352.stl
+288446.stl
+360073.stl
+362398.stl
+37743.stl
+383022.stl
+39182.stl
+39245.stl
+39495.stl
+39499.stl
+40841.stl
+41521.stl
+42040.stl
+44025.stl
+44064.stl
+44901.stl
+472050.stl
+50659.stl
+51797.stl
+57811.stl
+61418.stl
+61431.stl
+622000.stl
+62592.stl
+62593.stl
+65144.stl
+65395.stl
+65402.stl
+669962.stl
+68255.stl
+702204.stl
+70381.stl
+71461.stl
+723893.stl
+72419.stl
+726665.stl
+77343.stl
+84624.stl
+90225.stl
+906183.stl
+91147.stl
+91474.stl
+93702.stl
+93703.stl
+95796.stl
+95797.stl
+97515.stl
+97590.stl
+97593.stl
+99895.stl
+)
+
 function(CGAL_add_cdt3_test_from_Thingi10k data_name data_filename)
   set(options "ONLY_MERGE_FACETS")
   set(oneValueArgs TIMEOUT)
@@ -157,6 +243,9 @@ foreach(thingi_file_name ${thingi10k_max_10k_solid})
   if(thingi_file_name IN_LIST thingi10k_FAILED_WITH_SEGFAULT_CTest_20251002)
     list(APPEND LABELS "CTest_20251002_failed_segfault")
   endif()
+  if(thingi_file_name IN_LIST thingi10k_FAILED_WITH_MERGE_FACETS_CTest_20251028)
+    list(APPEND LABELS "CTest_20251028_failed_merge_facets")
+  endif()
   get_filename_component(thingi_ID "${thingi_file_name}" NAME_WE)
   CGAL_add_cdt3_test_from_Thingi10k(Thingi10K_${thingi_ID} ${thingi_file_name}
       TIMEOUT 600 LABELS ${LABELS} ${MY_ONLY_MERGE_FACETS})
diff --git a/Constrained_triangulation_3/test/Constrained_triangulation_3/cdt_3_from_off.cpp b/Constrained_triangulation_3/test/Constrained_triangulation_3/cdt_3_from_off.cpp
index 86f864937a4..8b5b1679628 100644
--- a/Constrained_triangulation_3/test/Constrained_triangulation_3/cdt_3_from_off.cpp
+++ b/Constrained_triangulation_3/test/Constrained_triangulation_3/cdt_3_from_off.cpp
@@ -11,6 +11,7 @@
 #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
 #include <CGAL/IO/File_binary_mesh_3.h>
 #include <CGAL/Named_function_parameters.h>
+#include <CGAL/Random.h>
 #include <CGAL/Surface_mesh.h>
 #include <CGAL/utility.h>
 
@@ -763,6 +764,7 @@ int bisect_errors(Mesh mesh, CDT_options options) {
 int main(int argc, char* argv[]) {
   std::cerr.precision(17);
   std::cout.precision(17);
+  CGAL::get_default_random() = CGAL::Random(42);
 
   CDT_options options(argc, argv);
   if(options.need_help) {