Predicate [self::text()] causes trouble.

modules/intermediate_format/preprocessing.xqm

@@ -211,9 +211,9 @@ declare function pre:preprocessing
                         )
                         
                         else if ( 
-                            ( $preceding-sibling[self::text()][matches(., "[\s\n\r\t]") and normalize-space(.) = ""] )
+                            ( $preceding-sibling[matches(., "[\s\n\r\t]") and normalize-space(.) = ""] )
                             and
-                            ( $following-sibling[self::text()][matches(., "[\s\n\r\t]") and normalize-space(.) = ""] )
+                            ( $following-sibling[matches(., "[\s\n\r\t]") and normalize-space(.) = ""] )
                         ) then (
                             attribute {"break"}{"yes"}
                         )
@@ -261,4 +261,4 @@ declare function pre:preprocessing
             default return ( 
                 pre:default-element( $node, pre:preprocessing($node/node()) )
             )
-};
\ No newline at end of file
+};