* Close the database before the destructor runs.

src/libstore/db.cc

@@ -278,6 +278,8 @@ void Database::close()
     } catch (DbException e) { rethrow(e); }
 
     delete env;
+
+    env = 0;
 }
 
 

src/libstore/store.cc

@@ -136,6 +136,13 @@ void initDB()
 }
 
 
+void closeDB()
+{
+    /* If the database isn't open, this is a NOP. */
+    nixDB.close();
+}
+
+
 void createStoreTransaction(Transaction & txn)
 {
     Transaction txn2(nixDB);

src/libstore/store.hh

@@ -49,6 +49,9 @@ void openDB(bool reserveSpace = true);
 /* Create the required database tables. */
 void initDB();
 
+/* Close the database. */
+void closeDB();
+
 /* Get a transaction object. */
 void createStoreTransaction(Transaction & txn);