From 0b2e9e3005255e92df4cc1be359edc04fd5c2ff6 Mon Sep 17 00:00:00 2001
From: Cornelius Roemer <cornelius.roemer@gmail.com>
Date: Thu, 18 Jul 2024 23:47:33 +0200
Subject: [PATCH] fix: use copy(v) which works also on str, instead of v.copy()
 which doesn't

resolves #5416
resolves #3404 (closed because stale, not because fixed)

Bug was possibly introduced in #3344
---
 conda_build/variants.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/conda_build/variants.py b/conda_build/variants.py
index b185a7eb34..fe659067e8 100644
--- a/conda_build/variants.py
+++ b/conda_build/variants.py
@@ -328,7 +328,7 @@ def _combine_spec_dictionaries(
                                     ) != len(ensure_list(v)):
                                         break
                                 else:
-                                    values[k] = v.copy()
+                                    values[k] = copy(v)
                                 missing_subvalues = [
                                     subvalue
                                     for subvalue in ensure_list(v)