suppress hoist_props for embedded assignments (#3074)

2018-04-11 05:19:16 +08:00
parent 4dd7d0e39b
commit ba7069d52b
2 changed files with 36 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3639,7 +3639,10 @@ merge(Compressor.prototype, {
        var top_retain = self instanceof AST_Toplevel && compressor.top_retain || return_false;
        var defs_by_id = Object.create(null);
        return self.transform(new TreeTransformer(function(node, descend) {
-            if (node instanceof AST_Assign && node.operator == "=" && can_hoist(node.left, node.right, 1)) {
+            if (node instanceof AST_Assign
+                && node.operator == "="
+                && node.write_only
+                && can_hoist(node.left, node.right, 1)) {
                descend(node, this);
                var defs = new Dictionary();
                var assignments = [];