Fix a["1_1"]

Close #204

3 files changed, 5 insertions, 2 deletions

diff --git a/lib/compress.js b/lib/compress.js
index c94af7d0..24cdc026 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1965,8 +1965,8 @@ merge(Compressor.prototype, {
         var prop = self.property;
         if (prop instanceof AST_String && compressor.option("properties")) {
             prop = prop.getValue();
-            if (compressor.option("screw_ie8") && RESERVED_WORDS(prop)
-                || !(RESERVED_WORDS(prop)) && is_identifier_string(prop)) {
+            if ((compressor.option("screw_ie8") && RESERVED_WORDS(prop))
+                || (!(RESERVED_WORDS(prop)) && is_identifier_string(prop))) {
                 return make_node(AST_Dot, self, {
                     expression : self.expression,
                     property   : prop
diff --git a/lib/parse.js b/lib/parse.js
index c8c5d0a0..a687495b 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -170,6 +170,7 @@ function is_identifier_char(ch) {
 function is_identifier_string(str){
     var i = str.length;
     if (i == 0) return false;
+    if (is_digit(str.charCodeAt(0))) return false;
     while (--i >= 0) {
         if (!is_identifier_char(str.charAt(i)))
             return false;
diff --git a/test/compress/properties.js b/test/compress/properties.js
index f490fd86..85045961 100644
--- a/test/compress/properties.js
+++ b/test/compress/properties.js
@@ -20,6 +20,7 @@ dot_properties: {
         a["*"] = "asterisk";
         a["\u0EB3"] = "unicode";
         a[""] = "whitespace";
+        a["1_1"] = "foo";
     }
     expect: {
         a.foo = "bar";
@@ -27,6 +28,7 @@ dot_properties: {
         a["*"] = "asterisk";
         a.\u0EB3 = "unicode";
         a[""] = "whitespace";
+        a["1_1"] = "foo";
     }
 }