From e318820a39eee9ae0b112772e5e33d0e668641a5 Mon Sep 17 00:00:00 2001
From: = <=>
Date: Wed, 21 Sep 2011 10:04:21 -0700
Subject: [PATCH] Ignore previously parsed xref streams

---
 pdf.js                   | 9 +++++----
 test/pdfs/f1040.pdf.link | 1 +
 test/test_manifest.json  | 6 ++++++
 3 files changed, 12 insertions(+), 4 deletions(-)
 create mode 100644 test/pdfs/f1040.pdf.link

diff --git a/pdf.js b/pdf.js
index 224becdf1..9a0b0977a 100644
--- a/pdf.js
+++ b/pdf.js
@@ -3094,10 +3094,11 @@ var XRef = (function() {
       // check for 'XRefStm' key
       if (IsInt(obj = dict.get('XRefStm'))) {
         var pos = obj;
-        if (pos in this.xrefstms)
-          error('Invalid XRef table');
-        this.xrefstms[pos] = 1; // avoid infinite recursion
-        this.readXRef(pos);
+        // ignore previously loaded xref streams (possible infinite recursion)
+        if (!(pos in this.xrefstms)) {
+          this.xrefstms[pos] = 1;
+          this.readXRef(pos);
+        }
       }
 
       return dict;
diff --git a/test/pdfs/f1040.pdf.link b/test/pdfs/f1040.pdf.link
new file mode 100644
index 000000000..a3299fc54
--- /dev/null
+++ b/test/pdfs/f1040.pdf.link
@@ -0,0 +1 @@
+http://www.irs.gov/pub/irs-pdf/f1040.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index a3115764a..edf13b7c5 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -139,5 +139,11 @@
        "link": true,
        "rounds": 1,
        "type": "load"
+    },
+    {  "id": "f1040",
+       "file": "pdfs/f1040.pdf",
+       "link": true,
+       "rounds": 1,
+       "type": "load"
     }
 ]