Adjusts heuristic for disabling Symbol encoding

src/core/evaluator.js

@@ -982,10 +982,11 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
                           Encodings.WinAnsiEncoding :
                           Encodings.StandardEncoding;
       // The Symbolic attribute can be misused for regular fonts
-      // Heuristic: we have to check if the font is a standard one also
+      // Heuristic: we have to check if the font is a standard one or
+      // toUnicode is provided
       if (!!(flags & FontFlags.Symbolic)) {
-        baseEncoding = !properties.file ? Encodings.SymbolSetEncoding :
-                                          Encodings.MacRomanEncoding;
+        baseEncoding = !properties.file && !properties.toUnicode ?
+          Encodings.SymbolSetEncoding : Encodings.MacRomanEncoding;
       }
       if (dict.has('Encoding')) {
         var encoding = dict.get('Encoding');

test/pdfs/.gitattributes

@@ -0,0 +1 @@
+*.pdf binary

test/pdfs/.gitignore

@@ -44,6 +44,7 @@
 !helloworld-bad.pdf
 !zerowidthline.pdf
 !bug868745.pdf
+!bug864847.pdf
 !issue1002.pdf
 !issue925.pdf
 !gradientfill.pdf

test/pdfs/bug864847.pdf

@@ -0,0 +1,98 @@
+%PDF-1.7
+
+1 0 obj  % entry point
+<<
+  /Type /Catalog
+  /Pages 2 0 R
+>>
+endobj
+
+2 0 obj
+<<
+  /Type /Pages
+  /MediaBox [ 0 0 200 200 ]
+  /Count 1
+  /Kids [ 3 0 R ]
+>>
+endobj
+
+3 0 obj
+<<
+  /Type /Page
+  /Parent 2 0 R
+  /Resources <<
+    /Font <<
+      /F1 4 0 R 
+    >>
+  >>
+  /Contents 5 0 R
+>>
+endobj
+6 0 obj 
+<<
+/Filter /LZWDecode
+/Length 192
+>>
+stream
+€Èd’!$Üi:呼ÆS2ÂLÆ“q<EFBFBD>äe9›Î§#”@b2™â€¡ˆÈ@d4˜á2	¸,Šͦ€*Mš'ô˜Èe3Mˆsƒ<EFBFBD>8Âm2‹ÊC‘Ìž<EFBFBD>$<EFBFBD>Èf&ùùÌàaŽœŒ&ã9”<ÃÃ1˜|
+2ÅLuHÅ^³[®Ô&ãšµ\¯V+ÕòÃ{³ÚL—[½Ç2š¨sJ5 @c<EFBFBD>ÅÍÇIDª‹8S¢fã,^3Žˆù®A‚@@
+endstream 
+endobj 
+7 0 obj 
+<<
+/FontName /Arial-ItalicMT
+/StemV 93
+/Ascent 625
+/Flags 4
+    /Descent 0
+/ItalicAngle 0
+/MissingWidth 750
+/FontBBox [0 0 625 625]
+/Type /FontDescriptor
+/CapHeight 625
+>>
+endobj
+4 0 obj 
+<<
+/BaseFont /Arial-ItalicMT
+/LastChar 32
+/Subtype /TrueType
+/ToUnicode 6 0 R
+/FontDescriptor 7 0 R
+/Widths [278]
+/Type /Font
+/FirstChar 32
+>>
+endobj
+
+5 0 obj  % page content
+<<
+  /Length 44
+>>
+stream
+BT
+70 50 TD
+/F1 12 Tf
+(Hello, 864847) Tj
+ET
+endstream
+endobj
+
+xref
+0 8
+0000000000 65535 f 
+0000000010 00000 n 
+0000000079 00000 n 
+0000000173 00000 n 
+0000000753 00000 n 
+0000000913 00000 n 
+0000000300 00000 n 
+0000000565 00000 n 
+trailer
+<<
+  /Size 8
+  /Root 1 0 R
+>>
+startxref
+1025
+%%EOF

test/test_manifest.json

@@ -769,6 +769,12 @@
       "rounds": 1,
       "type": "eq"
     },
+    {  "id": "bug864847",
+      "file": "pdfs/bug864847.pdf",
+      "md5": "2b62cbba5d40a769be8e611eb5b61bfe",
+      "rounds": 1,
+      "type": "eq"
+    },
     {  "id": "issue925",
       "file": "pdfs/issue925.pdf",
       "md5": "f58fe943090aff89dcc8e771bc0db4c2",