From 4949f7e0bddf6d1e7f85ac9afbc60b833afd8d2c Mon Sep 17 00:00:00 2001
From: "jon.crall" <jon.crall@kitware.com>
Date: Wed, 20 Jan 2021 14:02:44 -0500
Subject: [PATCH] Fix bug with doctest references

---
 CHANGELOG.md                | 7 ++++++-
 xdoctest/doctest_example.py | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c2182b9b..1a251117 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,9 +5,14 @@ We are currently working on porting this changelog to the specifications in
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
-## Version 0.15.1 - Unreleased
+## Version 0.15.2 - Unreleased
+
+### Fixed
+* Bug where references to doctest variables were never released
 
 
+## Version 0.15.1 - Unreleased
+
 ### Added
 * Documentation improvements
 * Minor text fixes
diff --git a/xdoctest/doctest_example.py b/xdoctest/doctest_example.py
index 22534658..0703636d 100644
--- a/xdoctest/doctest_example.py
+++ b/xdoctest/doctest_example.py
@@ -715,6 +715,10 @@ def run(self, verbose=None, on_error=None):
                 pytest.skip()
 
         summary = self._post_run(verbose)
+
+        # Clear the global namespace so doctests don't leak memory
+        self.global_namespace.clear()
+
         return summary
 
     @property