* lisp/info.el (Info-isearch-filter): Treat non-nil values of

`search-invisible' including its default value `open'
like the value `t' to match hidden text.

Fixes: debbugs:13402

lisp/ChangeLog

+2013-02-14  Juri Linkov  <juri@jurta.org>
+
+	* info.el (Info-isearch-filter): Treat non-nil values of
+	`search-invisible' including its default value `open'
+	like the value `t' to match hidden text.  (Bug#13402)
+
 2013-02-14  Glenn Morris  <rgm@gnu.org>
 
 	* help-fns.el (find-lisp-object-file-name): Give special treatment

lisp/info.el

@@ -2151,7 +2151,7 @@ and is not in the header line or a tag table."
     (let ((backward (< found beg-found)))
       (not
        (or
-	(and (not (eq search-invisible t))
+	(and (not search-invisible)
 	     (if backward
 		 (or (text-property-not-all found beg-found 'invisible nil)
 		     (text-property-not-all found beg-found 'display nil))