added AST_NaN (output as 0/0)

1 files changed, 6 insertions, 3 deletions

diff --git a/lib/compress.js b/lib/compress.js
index ca7bfe51..aedd78fd 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -526,9 +526,9 @@ function Compressor(options, false_by_default) {
                     });
                     break;
                   case "number":
-                    ast = make_node(AST_Number, this, {
+                    ast = make_node(isNaN(val) ? AST_NaN : AST_Number, this, {
                         value: val
-                    });
+                    }).optimize(compressor);
                     break;
                   case "boolean":
                     ast = make_node(val ? AST_True : AST_False, this);
@@ -1501,8 +1501,11 @@ function Compressor(options, false_by_default) {
     });
 
     AST_SymbolRef.DEFMETHOD("optimize", function(compressor){
-        if (this.name == "undefined" && this.undeclared()) {
+        if (this.undeclared()) switch (this.name) {
+          case "undefined":
             return make_node(AST_Undefined, this).optimize(compressor);
+          case "NaN":
+            return make_node(AST_NaN, this).optimize(compressor);
         }
         return this;
     });