From 02f14fd8574158b6e80194cb6c2cd7801fe58201 Mon Sep 17 00:00:00 2001
From: Dmitriy <dmitriy@mrzv.org>
Date: Fri, 24 Jul 2020 08:18:40 -0700
Subject: [PATCH] Initialize new_specs in Environment.remove() (#17592)

---
 lib/spack/spack/environment.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/spack/spack/environment.py b/lib/spack/spack/environment.py
index 151e73a0fd9..efc43b0250d 100644
--- a/lib/spack/spack/environment.py
+++ b/lib/spack/spack/environment.py
@@ -933,6 +933,7 @@ def remove(self, query_spec, list_name=user_speclist_name, force=False):
                 "Not found: {0}".format(query_spec))
 
         old_specs = set(self.user_specs)
+        new_specs = set()
         for spec in matches:
             if spec in list_to_change:
                 try: