--- a/src/HOL/Unix/Unix.thy Mon Aug 12 14:53:16 2013 +0200 +++ b/src/HOL/Unix/Unix.thy Mon Aug 12 15:09:13 2013 +0200 @@ -843,8 +843,6 @@ neither owned nor writable by @{term user\<^isub>1}. *} - - definition "invariant root path = (\<exists>att dir.