Install recent version of sqlite/pysqlite to fix crashes in tests.

scripts/upgrade_pysqlite.sh

+#!/bin/bash
+
+# Upgrade the version of pysqlite/sqlite to avoid crashes during testing.
+# Ideally, this code would just install a pre-built wheel - change it to this
+# once edX has its own artifact server.
+pip uninstall -y pysqlite
+rm -rf tmp_pysqlite_upgrade && mkdir -p tmp_pysqlite_upgrade && cd tmp_pysqlite_upgrade
+curl -o 2.8.3.tar.gz https://codeload.github.com/ghaering/pysqlite/tar.gz/2.8.3
+curl -o sqlite-autoconf-3140100.tar.gz https://www.sqlite.org/2016/sqlite-autoconf-3140100.tar.gz
+tar -xzvf sqlite-autoconf-3140100.tar.gz
+tar -xzvf 2.8.3.tar.gz
+cp -av sqlite-autoconf-3140100/. pysqlite-2.8.3/
+cd ./pysqlite-2.8.3 && python setup.py build_static install
+cd ../.. && rm -rf tmp_pysqlite_upgrade

tox.ini

@@ -60,5 +60,12 @@ deps =
     -rrequirements/edx-sandbox/base.txt
     -rrequirements/edx-sandbox/local.txt
     -rrequirements/edx-sandbox/post.txt
+whitelist_externals =
+    /bin/bash
+    /usr/bin/curl
+    /bin/tar
 commands =
+    # Upgrade sqlite to fix crashes during testing.
+    bash scripts/upgrade_pysqlite.sh
+    # Now perform testing.
     {posargs}