}
// pass 3: we should drop declarations not in_use
var tt = new TreeTransformer(
- function before(node, descend) {
+ function before(node, descend, in_list) {
if (node instanceof AST_Lambda) {
for (var a = node.argnames, i = a.length; --i >= 0;) {
var sym = a[i];
}
return node;
}
+ if (node instanceof AST_For && node.init instanceof AST_BlockStatement) {
+ descend(node, this);
+ // certain combination of unused name + side effect leads to:
+ // https://github.com/mishoo/UglifyJS2/issues/44
+ // that's an invalid AST.
+ // We fix it at this stage by moving the `var` outside the `for`.
+ var body = node.init.body.slice(0, -1);
+ node.init = node.init.body.slice(-1)[0].body;
+ body.push(node);
+ return in_list ? MAP.splice(body) : make_node(AST_BlockStatement, node, {
+ body: body
+ });
+ }
if (node instanceof AST_Scope && node !== self)
return node;
}
--- /dev/null
+issue_44_valid_ast_1: {
+ options = { unused: true };
+ input: {
+ function a(b) {
+ for (var i = 0, e = b.qoo(); ; i++) {}
+ }
+ }
+ expect: {
+ function a(b) {
+ var i = 0;
+ for (b.qoo(); ; i++);
+ }
+ }
+}
+
+issue_44_valid_ast_2: {
+ options = { unused: true };
+ input: {
+ function a(b) {
+ if (foo) for (var i = 0, e = b.qoo(); ; i++) {}
+ }
+ }
+ expect: {
+ function a(b) {
+ if (foo) {
+ var i = 0;
+ for (b.qoo(); ; i++);
+ }
+ }
+ }
+}