Svelte version 1.20.2 Template snippet: ```html <input type='checkbox' bind:checked='todo["done"]'> ``` Expected behavior: should compile as happily as if I had used `bind:checked='todo.done'` Observed behavior: compiler errors out with `Cannot read property 'name' of null` Reproduction: https://svelte.technology/repl?version=1.20.2&gist=6bc409d8cf45766230d012b355ebcf7c