Fixed dot property issue with invlid identifier names.

Signed-off-by: Justin Lau <justin@tclau.com>

diff --git a/lib/compress.js b/lib/compress.js
index ebd3dd7..623fe45 100644 (file)
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1962,7 +1962,8 @@ merge(Compressor.prototype, {
         var prop = self.property;
         if (prop instanceof AST_String && compressor.option("properties")) {
             prop = prop.getValue();
-            if (is_identifier(prop) || compressor.option("screw_ie8")) {
+            if (is_identifier(prop)
+                || (compressor.option("screw_ie8") && /^[a-z_$][a-z0-9_$]*$/i.test(prop))) {
                 return make_node(AST_Dot, self, {
                     expression : self.expression,
                     property   : prop