Merge r9917 into 3.6 branch. This fixes issue 103259.

src/array.js

Index: src/array.js
diff --git a/src/array.js b/src/array.js
index 4dd23c8bb464b31b4171e7e671b9a8bb106f1951..98fe3ac7b14e5b4861cf11d4581ed2a9e67ff367 100644
--- a/src/array.js
+++ b/src/array.js
@@ -172,12 +172,12 @@ function Join(array, length, separator, convert) {
     } else {
       for (var i = 0; i < length; i++) {
         var e = array[i];
-          if (IS_NUMBER(e)) {
-            e = %_NumberToString(e);
-          } else if (!IS_STRING(e)) {
-            e = convert(e);
-          }
-          elements[i] = e;
+        if (IS_NUMBER(e)) {
+          e = %_NumberToString(e);
+        } else if (!IS_STRING(e)) {
+          e = convert(e);
+        }
+        elements[i] = e;
       }
     }
     var result = %_FastAsciiArrayJoin(elements, separator);