From 222c1098b2cc5d3e8cc6e8782098c5b134d6b089 Mon Sep 17 00:00:00 2001
From: Calixte Denizet <calixte.denizet@gmail.com>
Date: Mon, 8 Aug 2022 22:04:14 +0200
Subject: [PATCH] Fix OTS issue with empty index (#15289)

---
 src/core/cff_parser.js        | 5 ++---
 test/pdfs/issue15289.pdf.link | 2 ++
 test/test_manifest.json       | 9 +++++++++
 3 files changed, 13 insertions(+), 3 deletions(-)
 create mode 100644 test/pdfs/issue15289.pdf.link

diff --git a/src/core/cff_parser.js b/src/core/cff_parser.js
index 78ebb167bed344..fd1a120427a302 100644
--- a/src/core/cff_parser.js
+++ b/src/core/cff_parser.js
@@ -1864,10 +1864,9 @@ class CFFCompiler {
     // First 2 bytes contains the number of objects contained into this index
     const count = objects.length;
 
-    // If there is no object, just create an index. This technically
-    // should just be [0, 0] but OTS has an issue with that.
+    // If there is no object, just create an index.
     if (count === 0) {
-      return [0, 0, 0];
+      return [0, 0];
     }
 
     const data = [(count >> 8) & 0xff, count & 0xff];
diff --git a/test/pdfs/issue15289.pdf.link b/test/pdfs/issue15289.pdf.link
new file mode 100644
index 00000000000000..0fd7733b403115
--- /dev/null
+++ b/test/pdfs/issue15289.pdf.link
@@ -0,0 +1,2 @@
+https://github.com/mozilla/pdf.js/files/9280755/issue15289.pdf
+
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 6635609a4922c9..797c19a87cce67 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -6882,5 +6882,14 @@
    "md5": "8505033d63625dfd77e90a3722b0c316",
    "rounds": 1,
    "type": "eq"
+   },
+   {  "id": "issue15289",
+      "file": "pdfs/issue15289.pdf",
+      "md5": "f3d20aee398e052ac3dce7cc030f50de",
+      "link": true,
+      "rounds": 1,
+      "firstPage": 1,
+      "lastPage": 1,
+      "type": "eq"
    }
 ]