fix for `a = !b && !c && !d && !e → a=!(b||c||d||e)`

diff --git a/lib/compress.js b/lib/compress.js
index 41578c1..1681257 100644 (file)
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1416,7 +1416,8 @@ merge(Compressor.prototype, {
                 return exp[0];
         }
         if (compressor.option("comparisons")) {
-            if (!(compressor.parent() instanceof AST_Binary)) {
+            if (!(compressor.parent() instanceof AST_Binary)
+                || compressor.parent() instanceof AST_Assign) {
                 var negated = make_node(AST_UnaryPrefix, self, {
                     operator: "!",
                     expression: self.negate(compressor)