| <!DOCTYPE html> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <script type="module"> |
| setup({allow_uncaught_exception: true }); |
| |
| // Keep FinalizationRegistry global to avoid it being reclaimed by garbage |
| // collections that may happen until the registry is processed in microtasks. |
| let fr; |
| |
| async_test(t => { |
| window.onerror = t.step_func_done(function(msg, source, lineno, colno, e) { |
| assert_equals(e.message, 'weakrefs are awesome', |
| 'Correct exception is thrown'); |
| }); |
| |
| function callback(holdings) { |
| throw new Error('weakrefs are awesome'); |
| } |
| |
| fr = new FinalizationRegistry(callback); |
| |
| (function() { |
| let garbage = {}; |
| fr.register(garbage, 'holdings'); |
| garbage = null; |
| })(); |
| |
| gc(); |
| }, 'FinalizationRegistry callback exceptions are reported to error handler'); |
| </script> |
