`stuff` not populated when using `goto` to reload page on an `__error` page

[geoffrich]

Describe the bug

This is a bit of an edge case, but if you:

1. Throw an error on a given route and show an error page
2. Provide a "reload" button on that error page that runs goto($page.url.toString())
3. The route passes stuff to its parent layout

On hitting the reload button, the page's stuff will not be returned, though any props will be. Navigating away from and back to the page will populate stuff appropriately.

Reproduction

Stackblitz

/page2 is configured to return the following from load.

{
	stuff: {
		page2: true
	},
	props: {
		number: 2
	}
}

Repro steps:

1. Click on "Page 2" to navigate to the page with the error. The route is configured to only throw an error on first load. The error page will be shown.
2. Click the "Reload" button on the error page, which calls goto($page.url.toString()). The page will successfully render with the props passed from load, but page2: true will not be in stuff.
3. Click on "Home" to navigate home. Then click on "Page 2" again. This time page2: true will be in stuff.

Expected behavior: page2: true is present in stuff even after reloading an error page with goto.

Logs

n/a

System Info

Can't run npx envinfo on StackBlitz.

@sveltejs/kit: 1.0.0-next.295

Severity

annoyance

Additional Information

I ran into this behavior on one of my SvelteKit sites. I'm rendering an __error page with a reload button. The page uses stuff to pass a title to the parent __layout, but the title is undefined after a reload from the error page.