From 29317973864894a3906f326dd0a9dbdc7819da44 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 8 Aug 2021 14:48:26 +0100
Subject: [PATCH] improve message from broken builtin config

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 src/config.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/config.rs b/src/config.rs
index abdc573..56abf1d 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -856,7 +856,8 @@ pub fn read(opts: &Opts, end: LinkEnd) -> Vec<InstanceConfig> {
     );
 
     agg.read_string(DEFAULT_CONFIG.into(),
-                    "<build-in defaults>".as_ref()).unwrap();
+                    "<build-in defaults>".as_ref())
+      .expect("builtin configuration is broken");
 
     agg.read_toplevel(&opts.config)?;
     for extra in &opts.extra_config {
-- 
2.30.2