diff --git a/projects/Closure/128/com/google/javascript/jscomp/CodeGenerator.java b/projects/Closure/128/com/google/javascript/jscomp/CodeGenerator.java
index 2270c17..1dc33b7 100644
--- a/projects/Closure/128/com/google/javascript/jscomp/CodeGenerator.java
+++ b/projects/Closure/128/com/google/javascript/jscomp/CodeGenerator.java
@@ -782,13 +782,16 @@ private void unrollBinaryOperator(
 
   static boolean isSimpleNumber(String s) {
     int len = s.length();
+    if (len == 0) {
+      return false;
+    }
     for (int index = 0; index < len; index++) {
       char c = s.charAt(index);
       if (c < '0' || c > '9') {
         return false;
       }
     }
-    return len > 0 && s.charAt(0) != '0';
+    return len == 1 || s.charAt(0) != '0';
   }
 
   static double getSimpleNumber(String s) {