* Get rid of identifiers since they are redundant now. This greatly

  simplifies stuff.

* The format of Nix expressions and the database schema changed
  because of this, so it's best to delete old Nix installations.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/db.cc b/src/db.cc
index 61ecb203a5fc..ffb1999fe56b 100644
--- a/src/db.cc
+++ b/src/db.cc
@@ -258,6 +258,8 @@ void Database::delPair(const Transaction & txn, TableId table,
         Db * db = getDb(table);
         Dbt kt((void *) key.c_str(), key.length());
         db->del(txn.txn, &kt, 0);
+        /* Non-existence of a pair with the given key is not an
+           error. */
     } catch (DbException e) { rethrow(e); }
 }