properly cover all cases of for-in loop variables (#1536)

2017-03-03 02:39:57 +08:00
parent fe9227a41b
commit 70d72ad806
2 changed files with 22 additions and 7 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -243,13 +243,13 @@ merge(Compressor.prototype, {
                    return true;
                }
                if (node instanceof AST_ForIn) {
-                    if (node.init instanceof AST_SymbolRef) {
-                        var d = node.init.definition();
-                        d.references.push(node.init);
-                        d.fixed = false;
-                    } else {
-                        node.init.walk(tw);
+                    var sym = node.init;
+                    if (sym instanceof AST_Var) {
+                        sym = sym.definitions[0].name;
                    }
+                    var d = sym.definition();
+                    d.references.push(sym);
+                    d.fixed = false;
                    node.object.walk(tw);
                    push();
                    node.body.walk(tw);