From 9205fb48a747edc14bbac9e70646cec93891c97c Mon Sep 17 00:00:00 2001
From: Patrick Spek <p.spek@tyil.nl>
Date: Thu, 12 Nov 2020 11:15:53 +0100
Subject: .clone the data hash

---
 CHANGELOG.md       | 8 ++++++++
 lib/Config.rakumod | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9874325..dc7ff5c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic
 Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- `.read` now uses `%!data.clone`, instead of `%!data`. This should fix an
+  issue where the `Hash` used is shared between the objects, resulting in
+  hard-to-debug errors.
+
 ## [3.0.0] - 2020-07-12
 
 `Config` has been rebuilt from the ground up. This is a relatively old
diff --git a/lib/Config.rakumod b/lib/Config.rakumod
index f85774a..2d33b71 100644
--- a/lib/Config.rakumod
+++ b/lib/Config.rakumod
@@ -149,7 +149,7 @@ multi method read (
 	Config.new(
 		%!template,
 		:$!name,
-		data => merge-hash(%!data, %data),
+		data => merge-hash(%!data.clone, %data),
 		:!read-from-env,
 		:!read-from-xdg,
 	)
-- 
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