Merge pull request github#16790 from github/max-schaefer-patch-1

JavaScript: Fix CodeQL alert in extractor

Author: erik-krogh

javascript/extractor/src/com/semmle/jcorn/Identifiers.java

@@ -115,7 +115,7 @@ private static Pattern nonASCIIidentifier() {
   // rare.
   private static boolean isInAstralSet(int code, int[] set) {
     int pos = 0x10000;
-    for (int i = 0; i < set.length; i += 2) {
+    for (int i = 0; i < set.length - 1; i += 2) {
       pos += set[i];
       if (pos > code) return false;
       pos += set[i + 1];