bpo-41815: SQLite: segfault if backup called on closed database (GH-22322)
# [bpo-41815](): SQLite: fix segfault if backup called on closed database
Attempting to backup a closed database will trigger segfault:
```python
import sqlite3
target = sqlite3.connect(':memory:')
source = sqlite3.connect(':memory:')
source.close()
source.backup(target)
```diff --git a/Lib/sqlite3/test/backup.py b/Lib/sqlite3/test/backup.py
index 2752a4d..3637c4b 100644
--- a/Lib/sqlite3/test/backup.py
+++ b/Lib/sqlite3/test/backup.py
@@ -35,6 +35,13 @@
with self.assertRaises(sqlite.ProgrammingError):
self.cx.backup(bck)
+ def test_bad_source_closed_connection(self):
+ bck = sqlite.connect(':memory:')
+ source = sqlite.connect(":memory:")
+ source.close()
+ with self.assertRaises(sqlite.ProgrammingError):
+ source.backup(bck)
+
def test_bad_target_in_transaction(self):
bck = sqlite.connect(':memory:')
bck.execute('CREATE TABLE bar (key INTEGER)')