def.value = null;
head.push(def);
} else {
- var value = def.value && def.value.drop_side_effect_free(compressor);
+ var value = def.value
+ && (sym.references.length != 1 || !sym.replaced)
+ && def.value.drop_side_effect_free(compressor);
if (value) {
AST_Node.warn("Side effects in initialization of unused variable {name} [{file}:{line},{col}]", template(def.name));
side_effects.push(value);
}
expect_stdout: "undefined"
}
+
+issue_3515: {
+ options = {
+ collapse_vars: true,
+ reduce_vars: true,
+ unused: true,
+ }
+ input: {
+ var c = 0;
+ (function() {
+ this[c++] = 0;
+ var expr20 = !0;
+ for (var key20 in expr20);
+ })();
+ console.log(c);
+ }
+ expect: {
+ var c = 0;
+ (function() {
+ for (var key20 in !(this[c++] = 0));
+ })();
+ console.log(c);
+ }
+ expect_stdout: "1"
+}