fix top_retain on hoist_props (#2474)

fixes #2473
2017-11-13 00:59:41 +08:00
parent c6cfa04d10
commit 2ac5086831
2 changed files with 91 additions and 0 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2769,6 +2769,7 @@ merge(Compressor.prototype, {
    AST_Scope.DEFMETHOD("hoist_properties", function(compressor){
        var self = this;
        if (!compressor.option("hoist_props") || compressor.has_directive("use asm")) return self;
+        var top_retain = self instanceof AST_Toplevel && compressor.top_retain || return_false;
        var defs_by_id = Object.create(null);
        var var_names = Object.create(null);
        self.enclosed.forEach(function(def) {
@@ -2784,6 +2785,7 @@ merge(Compressor.prototype, {
                    && !(def = sym.definition()).escaped
                    && !def.single_use
                    && !def.direct_access
+                    && !top_retain(def)
                    && (value = sym.fixed_value()) === node.value
                    && value instanceof AST_Object) {
                    var defs = new Dictionary();