fix dead_code on AST_Destructuring (#2392)

fixes #2383
2017-10-23 00:34:34 +08:00
parent 44352eb26a
commit 7d9a8596a9
2 changed files with 76 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3315,7 +3315,21 @@ merge(Compressor.prototype, {
    });

    AST_Definitions.DEFMETHOD("remove_initializers", function(){
-        this.definitions.forEach(function(def){ def.value = null });
+        var decls = [];
+        this.definitions.forEach(function(def) {
+            if (def.name instanceof AST_SymbolDeclaration) {
+                def.value = null;
+                decls.push(def);
+            } else def.name.walk(new TreeWalker(function(node) {
+                if (node instanceof AST_SymbolDeclaration) {
+                    decls.push(make_node(AST_VarDef, def, {
+                        name: node,
+                        value: null
+                    }));
+                }
+            }));
+        });
+        this.definitions = decls;
    });

    AST_Definitions.DEFMETHOD("to_assignments", function(compressor){