Hi,

(corresponding bug report for LaTeX: https://tex.stackexchange.com/questions/585289/corrupt-pdf-with-includegraphics?noredirect=1#comment1471060_585289 )

when LuaTeX includes a PDF file in which a Page object contains a
Metadata stream, then the output is a invalid PDF file since LuaTeX adds
the stream inline into the directory instead of adding a reference.

plain LuaTeX example: Download page.pdf from https://bitbucket.org/longwayahead/latex-problem/src/master/
and then compile with plain LuaTeX:

\saveimageresource{./page.pdf}
\useimageresource\lastsavedimageresourceindex
\bye

The issue can be fixed by removing a single character: In pdftoepdf.c,
line 875 a comment correctly mentions that indirection has to be
preserved, but for this to work the previous ppdict_rget_obj has to be
replaced with ppdict_get_obj to ensure that indirections are not already resolved.

Best regards,
Marcel

diff --git a/source/texk/web2c/luatexdir/image/pdftoepdf.c b/source/texk/web2c/luatexdir/image/pdftoepdf.c
index 78dab3a37..ca68ba8dc 100644
--- a/source/texk/web2c/luatexdir/image/pdftoepdf.c
+++ b/source/texk/web2c/luatexdir/image/pdftoepdf.c
@@ -864,15 +864,15 @@ void write_epdf(PDF pdf, image_dict * idict, int suppress_optional_info)
     if (obj != NULL && obj->type != PPREF) {
         formatted_warning("pdf inclusion","/Metadata must be indirect object");
     }
     /*
         copy selected items in Page dictionary
     */
     for (i = 0; pagedictkeys[i] != NULL; i++) {
-        obj = ppdict_rget_obj(pageDict, pagedictkeys[i]);
+        obj = ppdict_get_obj(pageDict, pagedictkeys[i]);
         if (obj != NULL) {
             pdf_add_name(pdf, pagedictkeys[i]);
             /*
                 preserves indirection
             */
             copyObject(pdf, pdf_doc, obj);
         }

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