From e191f7e1a4edf5952f91eb8ac16a59ffab17e193 Mon Sep 17 00:00:00 2001
From: John Kirkham <jakirkham@gmail.com>
Date: Thu, 9 Sep 2021 00:16:42 -0700
Subject: [PATCH] Install pickle5 in Python 3.7 CI jobs

---
 .github/workflows/tests.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 703e5ba947a..da1f714dee2 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -54,6 +54,12 @@ jobs:
         shell: bash -l {0}
         run: conda config --show
 
+      - name: Optionally install pickle5
+        shell: bash -l {0}
+        # pickle5 is used for out-of-band pickling support in Python 3.7
+        if: ${{ matrix.os == 'ubuntu-latest' && matrix.python-version < '3.8' }}
+        run: mamba install -c conda-forge pickle5
+
       - name: Install stacktrace
         shell: bash -l {0}
         # stacktrace for Python 3.8 has not been released at the moment of writing