Fix OOM when parsing bare hex number.

Fixes #228.
json5 · Apr 4, 2020 · f1d3c8a · f1d3c8a
1 parent 661c418
commit f1d3c8a
Showing 1 changed file with 5 additions and 5 deletions.
diff --git a/lib/util.js b/lib/util.js
@@ -2,11 +2,11 @@ const unicode = require('../lib/unicode')
 
 module.exports = {
     isSpaceSeparator (c) {
-        return unicode.Space_Separator.test(c)
+        return typeof c === 'string' && unicode.Space_Separator.test(c)
     },
 
     isIdStartChar (c) {
-        return (
+        return typeof c === 'string' && (
             (c >= 'a' && c <= 'z') ||
         (c >= 'A' && c <= 'Z') ||
         (c === '$') || (c === '_') ||
@@ -15,7 +15,7 @@ module.exports = {
     },
 
     isIdContinueChar (c) {
-        return (
+        return typeof c === 'string' && (
             (c >= 'a' && c <= 'z') ||
         (c >= 'A' && c <= 'Z') ||
         (c >= '0' && c <= '9') ||
@@ -26,10 +26,10 @@ module.exports = {
     },
 
     isDigit (c) {
-        return /[0-9]/.test(c)
+        return typeof c === 'string' && /[0-9]/.test(c)
     },
 
     isHexDigit (c) {
-        return /[0-9A-Fa-f]/.test(c)
+        return typeof c === 'string' && /[0-9A-Fa-f]/.test(c)
     },
 }