* Close the database before the destructor runs.

src/libmain/shared.cc

@@ -14,6 +14,7 @@ extern "C" {
 
 #include "globals.hh"
 #include "gc.hh"
+#include "store.hh"
 #include "shared.hh"
 
 #include "config.h"
@@ -213,6 +214,8 @@ static void initAndRun(int argc, char * * argv)
     RemoveTempRoots removeTempRoots; /* unused variable - don't remove */
 
     run(remaining);
+
+    closeDB(); /* it's fine if the DB isn't actually open */
 }
 
 

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);