From b73534a1aafad69bfeb0964a2e5363f0608beb7c Mon Sep 17 00:00:00 2001
From: Olly Betts <olly@survex.com>
Date: Fri, 1 Jul 2022 16:17:58 +1200
Subject: [PATCH] Try specifying a specific random engine

Maybe that's why some CI builds fail...
---
 xapian-letor/ranker/ranker.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xapian-letor/ranker/ranker.cc b/xapian-letor/ranker/ranker.cc
index 67e76510af8..d674cb8b7d9 100644
--- a/xapian-letor/ranker/ranker.cc
+++ b/xapian-letor/ranker/ranker.cc
@@ -403,7 +403,7 @@ Ranker::xavier_initialisation(int feature_cnt)
     // Construct a trivial random generator engine:
     // 469382313 is a random number for which we are getting the best
     // performance of letor against standard benchmark datasets.
-    default_random_engine generator(469382313);
+    mt19937 generator(469382313);
     normal_distribution<double> distribution(0.0,
 					     sqrt(2.0 / (1 + feature_cnt)));
     vector<double> new_parameters;