fail more completely by deleting dbhash from sys.modules if bsddb can't be
loaded - prevents second import later from succeeding spuriously - mostly of
use in regression tests where the module might get imported more than once
diff --git a/Lib/dbhash.py b/Lib/dbhash.py
index 4abd4f0..ad94ed8 100644
--- a/Lib/dbhash.py
+++ b/Lib/dbhash.py
@@ -1,6 +1,12 @@
"""Provide a (g)dbm-compatible interface to bsdhash.hashopen."""
-import bsddb
+import sys
+try:
+ import bsddb
+except ImportError:
+ # prevent a second import of this module from spuriously succeeding
+ del sys.modules[__name__]
+ raise
__all__ = ["error","open"]