new catch/throw design git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@281 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@280 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
which included commits to RCS files with non-trunk default branches. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@5 b08c6af1-5177-4d33-ba66-4b1c6b8b522a