Range check in OTProcessor#getClassID

foliojs · Mar 20, 2017 · 26f99b8 · 26f99b8
1 parent f2a6899
commit 26f99b8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/opentype/OTProcessor.js b/src/opentype/OTProcessor.js
@@ -236,7 +236,7 @@ export default class OTProcessor {
     switch (classDef.version) {
       case 1: // Class array
         let i = glyph - classDef.startGlyph;
-        if (i < classDef.classValueArray.length) {
+        if (i >= 0 && i < classDef.classValueArray.length) {
           return classDef.classValueArray[i];
         }