commit 8993cef512f4545c0e407a733bae4fa4225f3989
from: Sven M. Hallberg <pesco@khjk.org>
date: Tue Aug 09 19:02:14 2022 UTC

add a test case for cyclically defined objects

This commit contains a failing test case. It contains a stream with a
/Type entry that is an indirect reference to an object defined as
itself:

    obj 8 0
    8 0 R
    endobj

The implementation of resolve() does not properly detect cycles and runs
into an infinite loop.

commit - 5010a4dc4459f9d3cc94dcf635285b317085b578
commit + 8993cef512f4545c0e407a733bae4fa4225f3989
blob - /dev/null
blob + be67696abfef0b34980551ecc6ad61dce956dc6d (mode 644)
--- /dev/null
+++ test/valid/selfref.pdf
@@ -0,0 +1,79 @@
+%PDF-1.4
+1 0 obj
+    << /Type /Catalog
+       /Outlines 2 0 R
+       /Pages 3 0 R
+    >>
+endobj
+
+2 0 obj
+    << /Type /Outlines
+       /Count 0
+    >>
+endobj
+
+3 0 obj
+    << /Type /Pages
+       /Kids [4 0 R]
+       /Count 1
+    >>
+endobj
+
+4 0 obj
+    << /Type /Page
+       /Parent 3 0 R
+       /MediaBox [0 0 612 792]
+       /Contents 5 0 R
+       /Resources << /ProcSet 6 0 R
+                     /Font << /F1 7 0 R >>
+                  >>
+    >>
+endobj
+
+5 0 obj
+    << /Length 76 /Type 8 0 R >>
+stream
+    BT
+        /F1 24 Tf
+        100 100 Td
+        (Hello World) Tj
+    ET
+endstream
+endobj
+
+6 0 obj
+    [/PDF /Text]
+endobj
+
+7 0 obj
+    << /Type /Font
+       /Subtype /Type1
+       /Name /F1
+       /BaseFont /Helvetica
+       /Encoding /MacRomanEncoding
+    >>
+endobj
+
+8 0 obj
+    8 0 R
+endobj
+
+xref
+0 9
+0000000000 65535 f 
+0000000009 00000 n 
+0000000097 00000 n 
+0000000159 00000 n 
+0000000239 00000 n 
+0000000456 00000 n 
+0000000598 00000 n 
+0000000631 00000 n 
+0000000776 00000 n 
+
+trailer
+    << /Size 9
+       /Root 1 0 R
+    >>
+startxref
+802
+%%EOF