From de2cb864faaac04f711e6d0241efcda96d2c5829 Mon Sep 17 00:00:00 2001
From: Massimiliano Culpo <massimiliano.culpo@googlemail.com>
Date: Wed, 11 Jan 2017 16:38:22 +0100
Subject: mirror: fix error for some specs during concretization (#2806)

---
 lib/spack/spack/mirror.py | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib')

diff --git a/lib/spack/spack/mirror.py b/lib/spack/spack/mirror.py
index 97aeef5434..aef5e2e8ee 100644
--- a/lib/spack/spack/mirror.py
+++ b/lib/spack/spack/mirror.py
@@ -104,6 +104,9 @@ def get_matching_versions(specs, **kwargs):
                 s = Spec(pkg.name)
                 s.versions = VersionList([v])
                 s.variants = spec.variants.copy()
+                # This is needed to avoid hanging references during the
+                # concretization phase
+                s.variants.spec = s
                 matching_spec.append(s)
 
         if not matching_spec:
-- 
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