Fails to render pages/_error when exception is thrown in CSR

[wilsonpage]

Describe the bug
When an exception is throw in the render phase of a clientside rendered page the Next.JS pages/_error fails to render. I'm unsure if this is a bug in next, preact or next-plugin-preact happy to post elsewhere if there's a better place.

To Reproduce

• Repro: https://nextjs-preact-demo-wilsonpage.vercel.app/
• Source: https://github.com/wilsonpage/next-preact-error-handling-bug

Steps to reproduce the behavior:

1. Visit /
2. Click link to render /failing
3. Observe fails to JS console showing 5x render and exceptions

Expected behavior

• Should only invoke pages/failing render once
• Should then render pages/_error