Item1566: fix infinite loop

git-svn-id: http://svn.foswiki.org/trunk@3816 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
foswiki · May 5, 2009 · 131159c · 131159c
1 parent da16dc0
commit 131159c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/core/lib/Foswiki/Prefs.pm b/core/lib/Foswiki/Prefs.pm
@@ -262,7 +262,8 @@ sub _restore {
     foreach ( keys %{ $this->{'map'} } ) {
         $this->{'map'}{$_} &= $mask;
         substr( $this->{'map'}{$_}, -1 ) = ''
-          while ord( substr( $this->{'map'}{$_}, -1 ) ) == 0;
+          while length( $this->{'map'}{$_} ) > 0
+              && ord( substr( $this->{'map'}{$_}, -1 ) ) == 0;
         delete $this->{'map'}{$_} if length( $this->{'map'}{$_} ) == 0;
     }