Map missing glyphs to the notdef glyph for TrueType (3, 1) fonts regardless if the 'post' table is defined or not (issue 6889)

src/core/fonts.js

@@ -4362,10 +4362,12 @@ var Font = (function FontClosure() {
               var glyphId = properties.glyphNames.indexOf(glyphName);
               if (glyphId > 0 && hasGlyph(glyphId, -1, -1)) {
                 charCodeToGlyphId[charCode] = glyphId;
-              } else {
-                charCodeToGlyphId[charCode] = 0; // notdef
+                found = true;
               }
             }
+            if (!found) {
+              charCodeToGlyphId[charCode] = 0; // notdef
+            }
           }
         } else if (cmapPlatformId === 0 && cmapEncodingId === 0) {
           // Default Unicode semantics, use the charcodes as is.

test/pdfs/.gitignore

@@ -202,6 +202,7 @@
 !issue6106.pdf
 !issue6296.pdf
 !issue6298.pdf
+!issue6889.pdf
 !bug1001080.pdf
 !issue6108.pdf
 !issue6113.pdf

test/test_manifest.json

@@ -1446,6 +1446,13 @@
        "link": false,
        "type": "eq"
     },
+    {  "id": "issue6889",
+       "file": "pdfs/issue6889.pdf",
+       "md5": "397fa92da1a8bfa83dc8c20287854d15",
+       "rounds": 1,
+       "link": false,
+       "type": "eq"
+    },
     {  "id": "tamreview",
       "file": "pdfs/TAMReview.pdf",
       "md5": "8039aba56790d3597d2bc8c794a51301",