Avoid collision with local variable `undefined` under certain corner cases.
fixes #2298
if (sym.name in names) continue;
names[sym.name] = true;
var arg = iife.args[i];
- if (!arg) arg = make_node(AST_Undefined, sym);
+ if (!arg) arg = make_node(AST_Undefined, sym).transform(compressor);
else {
var tw = new TreeWalker(function(node) {
if (!arg) return true;
}
expect_stdout: "PASS"
}
+
+issue_2298: {
+ options = {
+ collapse_vars: true,
+ reduce_vars: true,
+ unused: true,
+ }
+ input: {
+ !function() {
+ function f() {
+ var a = undefined;
+ var undefined = a++;
+ try {
+ !function g(b) {
+ b[1] = "foo";
+ }();
+ console.log("FAIL");
+ } catch (e) {
+ console.log("PASS");
+ }
+ }
+ f();
+ }();
+ }
+ expect: {
+ !function() {
+ (function() {
+ var a = undefined;
+ var undefined = a++;
+ try {
+ !function(b) {
+ (void 0)[1] = "foo";
+ }();
+ console.log("FAIL");
+ } catch (e) {
+ console.log("PASS");
+ }
+ })();
+ }();
+ }
+ expect_stdout: "PASS"
+}