catch empty db names early SERVER-821

1 files changed, 4 insertions, 1 deletions

diff --git a/db/db.h b/db/db.h
index 0bbc97b5380..78fc98d9158 100644
--- a/db/db.h
+++ b/db/db.h
@@ -141,8 +141,11 @@ namespace mongo {
         
         string _todb( const string& ns ) const {
             size_t i = ns.find( '.' );
-            if ( i == string::npos )
+            if ( i == string::npos ){
+                uassert( 13074 , "db name can't be empty" , ns.size() );
                 return ns;
+            }
+            uassert( 13075 , "db name can't be empty" , i > 0 );
             return ns.substr( 0 , i );
         }