From 75cedf46dba58e94b55678dc64bd4f77e23de5cd Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 22 Feb 2024 10:30:21 +0200
Subject: Diagnose instead of asserting lib{} group with no members

Fixes GH issue #361.
---
 libbuild2/bin/utility.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libbuild2/bin/utility.cxx b/libbuild2/bin/utility.cxx
index 2a87bbd..a03ea50 100644
--- a/libbuild2/bin/utility.cxx
+++ b/libbuild2/bin/utility.cxx
@@ -89,7 +89,9 @@ namespace build2
         // Make sure group members are resolved.
         //
         group_view gv (resolve_members (a, l));
-        assert (gv.members != nullptr);
+
+        if (gv.members == nullptr)
+          fail << "group " << l << " has no members";
 
         pair<otype, bool> p (
           link_member (lmembers {l.a != nullptr, l.s != nullptr}, li.order));
-- 
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