Await Parenthesis

[j3rem1e]

Describe the bug

If a component contains a javascript statement "await (expression)", then svelte removes the parenthesis in the generated javascript. However, the execution order is not the same (at least in chrome) :

"await a || b" is executed as "(await a) || b"

The bug is probably a regression between 3.12 and 3.17.1

To Reproduce

https://svelte.dev/repl/79a4dad98f3f41d7ae9840d3eb8209ea?version=3.17.1

	async function myTest() {
		let a, b;
		let c = await (a || b);
	}

has been outputed as

async function myTest() {
	let a, b;
	let c = await a || b;
}

Expected behavior

The parenthesis should not be removed in the generated javascript.

Information about your Svelte project:

• Chrome 77
• Svelte 3.17.1
• Windows 7
• Webpack

Severity

This is a minor issue because a workaround is easy to write, however the generated javascript is not correct and it's a regression with a previous version of svelte. it was not easy to find the cause of this new bugs in my application.

[Conduitry]

Thanks, opened Rich-Harris/code-red#24 for the underlying issue.

[Conduitry]

Fixed in 3.17.2 - https://svelte.dev/repl/79a4dad98f3f41d7ae9840d3eb8209ea?version=3.17.2