ZF-7176: Zend PDF loads Zend_Memory_Container_Locked Object into Properties Array - which may cause fatal error
I have at least one PDF where when loaded by Zend_PDF, Zend_Memory_Container_Locked objects are pulled into the Document Type Dictionary properties array.
Array ( ... [SaveStreams] => Array ( [Q] => Zend_Memory_Container_Locked Object ( [value] => Q )
[q] => Zend_Memory_Container_Locked Object ( [value] => q ) ) [Changes] => Array (  => Array ( [Creator] => SPDF [Producer] => SPDF [ModDate] => D:20060401000353-05'00' [CreationDate] => D:20060401000353-05'00' )  => Array ( [Version] => 3.0, SPDF Build Number 1085 for Linux 7, Application Build Date: May 15 2003 [ModDate] => D:20060401050353-00'00' [Product] => AppendPro [Vendor] => Appligent ) )
If you then modify the properties array, saving crashes with a fatal error.