▸ for f in spec/unit/data/simple-out{,-annotated,-annotation-deleted}.pdf; do \
  diff -u \
    --label=a/$f <(git sh @~:$f | xxd) \
    --label=b/$f <(git sh @:$f | xxd); \
done
--- a/spec/unit/data/simple-out.pdf
+++ b/spec/unit/data/simple-out.pdf
@@ -346,7 +346,7 @@
 00001590: 312e 3838 3938 5d2f 4341 202e 353e 3e0a  1.8898]/CA .5>>.
 000015a0: 656e 646f 626a 0a0a 7872 6566 0a30 2031  endobj..xref.0 1
 000015b0: 350a 3030 3030 3030 3030 3030 2036 3535  5.0000000000 655
-000015c0: 3336 2066 200a 3030 3030 3030 3030 3136  36 f .0000000016
+000015c0: 3335 2066 200a 3030 3030 3030 3030 3136  35 f .0000000016
 000015d0: 2030 3030 3030 206e 200a 3030 3030 3030   00000 n .000000
 000015e0: 3030 3638 2030 3030 3030 206e 200a 3030  0068 00000 n .00
 000015f0: 3030 3030 3031 3431 2030 3030 3030 206e  00000141 00000 n
--- a/spec/unit/data/simple-out-annotated.pdf
+++ b/spec/unit/data/simple-out-annotated.pdf
@@ -347,7 +347,7 @@
 000015a0: 6e74 656e 7473 2861 6e6e 6f74 6174 696f  ntents(annotatio
 000015b0: 6e20 636f 6e74 656e 7473 293e 3e0a 656e  n contents)>>.en
 000015c0: 646f 626a 0a0a 7872 6566 0a30 2031 350a  dobj..xref.0 15.
-000015d0: 3030 3030 3030 3030 3030 2030 3030 3031  0000000000 00001
+000015d0: 3030 3030 3030 3030 3030 2036 3535 3335  0000000000 65535
 000015e0: 2066 200a 3030 3030 3030 3030 3136 2030   f .0000000016 0
 000015f0: 3030 3030 206e 200a 3030 3030 3030 3030  0000 n .00000000
 00001600: 3638 2030 3030 3030 206e 200a 3030 3030  68 00000 n .0000
--- a/spec/unit/data/simple-out-annotation-deleted.pdf
+++ b/spec/unit/data/simple-out-annotation-deleted.pdf
@@ -345,7 +345,7 @@
 00001580: 2e38 3839 3820 3020 3834 312e 3838 3938  .8898 0 841.8898
 00001590: 5d2f 4341 202e 353e 3e0a 656e 646f 626a  ]/CA .5>>.endobj
 000015a0: 0a0a 7872 6566 0a30 2031 350a 3030 3030  ..xref.0 15.0000
-000015b0: 3030 3030 3030 2036 3535 3336 2066 200a  000000 65536 f .
+000015b0: 3030 3030 3030 2036 3535 3335 2066 200a  000000 65535 f .
 000015c0: 3030 3030 3030 3030 3136 2030 3030 3030  0000000016 00000
 000015d0: 206e 200a 3030 3030 3030 3030 3638 2030   n .0000000068 0
 000015e0: 3030 3030 206e 200a 3030 3030 3030 3031  0000 n .00000001

commit c8ebc2232494ed75abd129b55299ae47be0f28a2
Author: Robin Watts <Robin.Watts@artifex.com>
Date:   Mon Dec 23 00:07:41 2024 +0000

    Bug 708211: Mutool clean produces object 0 with invalid gen num.
    
    The spec says it should always be 65535, but we're updating it...
---
 source/pdf/pdf-write.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/pdf/pdf-write.c b/source/pdf/pdf-write.c
index e471a16a..4cbe7f22 100644
--- a/source/pdf/pdf-write.c
+++ b/source/pdf/pdf-write.c
@@ -3919,6 +3919,7 @@ do_pdf_save_document(fz_context *ctx, pdf_document *doc, pdf_write_state *opts,
 					lastfree = num;
 				}
 			}
+			opts->gen_list[0] = 0xffff;
 
 			if (opts->do_linear && opts->page_count > 0)
 			{