Fix infinite loop for bookmark search

testing/resources/bookmarks_circular.in

Index: testing/resources/bookmarks_circular.in
diff --git a/testing/resources/bookmarks_circular.in b/testing/resources/bookmarks_circular.in
new file mode 100644
index 0000000000000000000000000000000000000000..48a5695e17d2fc203bfe66d8f34702bfbe4cb549
--- /dev/null
+++ b/testing/resources/bookmarks_circular.in
@@ -0,0 +1,98 @@
+{{header}}
+{{object 1 0}} <<
+  /Type /Catalog
+  /Pages 2 0 R
+  /Outlines 14 0 R
+>>
+endobj
+{{object 2 0}} <<
+  /Type /Pages
+  /Count 2
+  /Kids [
+    3 0 R
+    4 0 R
+  ]
+>>
+endobj
+% Page number 0.
+{{object 3 0}} <<
+  /Type /Page
+  /Parent 2 0 R
+  /Resources <<
+    /Font <</F1 15 0 R>>
+  >>
+  /Contents [21 0 R]
+  /MediaBox [0 0 612 792]
+>>
+endobj
+% Page number 1.
+{{object 4 0}} <<
+  /Type /Page
+  /Parent 2 0 R
+  /Resources  <<
+    /Font <</F1 15 0 R>>
+  >>
+  /Contents [22 0 R]
+  /MediaBox [0 0 612 792]
+>>
+endobj
+% First bookmark
+{{object 10 0}} <<
+  /Title (A Good Beginning)
+  /Parent 14 0 R
+  /Next 11 0 R
+  /Dest (foo)
+>>
+endobj
+% Last bookmark
+{{object 11 0}} <<
+  /Title (A Good Ending)
+  /Parent 14 0 R
+  /Next 10 0 R
+  /Dest (bar)
+>>
+endobj
+% Root bookmark
+{{object 14 0}} <<
+  /Type /Outlines
+  /First 10 0 R
+  /Last  11 0 R
+  /Count 2
+>>
+endobj
+% Font resource.
+{{object 15 0}} <<
+  /Type /Font
+  /Subtype /Type1
+  /BaseFont /Arial
+>>
+endobj
+% Content for page 0.
+{{object 21 0}} <<
+  /Length 0
+>>
+stream
+BT
+/F1 20 Tf
+100 600 TD (Page1)Tj
+ET
+endstream
+endobj
+% Content for page 1.
+{{object 22 0}} <<
+  /Length 0
+>>
+stream
+BT
+/F1 20 Tf
+100 600 TD (Page2)Tj
+ET
+endstream
+endobj
+{{xref}}
+trailer <<
+  /Size 6
+  /Root 1 0 R
+>>
+{{startxref}}
+%%EOF