Created attachment 192283 [details]
A document package with a stream not referenced in its manifest.xml

The attachment is just a simple Writer document (having text "Empty document"), manually edited using 7-Zip to add an empty text file "unreferenced.txt" into its root directory, without also adding a reference to it into the package's manifest.xml. This is an invalid ODF; and LibreOffice naturally asks to repair it on normal opening. When user agrees, the document opens normally.

Try to run this macro to open this attachment in RepairPackage mode:

sub OpenRepairPackage
  url = ConvertToURL("Path/To/unreferenced_stream.odt")
  dim args(0) as new com.sun.star.beans.PropertyValue
  args(0).Name = "RepairPackage"
  args(0).Value = true
  StarDesktop.loadComponentFromURL(url, "_blank", 0, args())
end sub

This macro (with corrected path to the file) results in "General input/output error." message, and the document isn't opened. It obviously should, because the RepairPackage MediaDescriptor property [1] serves as explicit request to try to repair it.

[1] https://api.libreoffice.org/docs/idl/ref/servicecom_1_1sun_1_1star_1_1document_1_1MediaDescriptor.html#ab5ae6f2c9a82bcb8f006f4b46fee1691