Merge pull request #15397 from Snuffleupagus/getEexecBlock-empty

Fallback to a standard font when a Type1 font program is empty (issue 15292)

src/core/type1_font.js

@@ -24,11 +24,11 @@ import {
   CFFStrings,
   CFFTopDict,
 } from "./cff_parser.js";
+import { FormatError, warn } from "../shared/util.js";
 import { SEAC_ANALYSIS_ENABLED, type1FontGlyphMapping } from "./fonts_utils.js";
 import { isWhiteSpace } from "./core_utils.js";
 import { Stream } from "./stream.js";
 import { Type1Parser } from "./type1_parser.js";
-import { warn } from "../shared/util.js";
 
 function findBlock(streamBytes, signature, startIndex) {
   const streamBytesLength = streamBytes.length;
@@ -140,6 +140,9 @@ function getEexecBlock(stream, suggestedLength) {
   // in the returned eexec block. In practice this does *not* seem to matter,
   // since `Type1Parser_extractFontProgram` will skip over any non-commands.
   const eexecBytes = stream.getBytes();
+  if (eexecBytes.length === 0) {
+    throw new FormatError("getEexecBlock - no font program found.");
+  }
   return {
     stream: new Stream(eexecBytes),
     length: eexecBytes.length,

test/pdfs/issue15292.pdf.link

@@ -0,0 +1 @@
+https://github.com/mozilla/pdf.js/files/9288663/issue15292.pdf

test/test_manifest.json

@@ -153,6 +153,14 @@
        "lastPage": 1,
        "type": "eq"
     },
+    {  "id": "issue15292",
+       "file": "pdfs/issue15292.pdf",
+       "md5": "24297e183bf16cdd684dac8902e9fbe6",
+       "rounds": 1,
+       "link": true,
+       "lastPage": 1,
+       "type": "eq"
+    },
     {  "id": "issue11549",
        "file": "pdfs/issue11549_reduced.pdf",
        "md5": "a1ea636f413e02e10dbdf379ab4a99ae",