0.63: 404.html layout with base template does not work

[dukebarman]

What version of Hugo are you using (hugo version)?

$ hugo version
Hugo Static Site Generator v0.63.1/extended darwin/amd64

Does this issue reproduce with the latest release?

Yes

I couldn't use {{ define "main" }} variable in 404.html layout. It generates a warning:

INFO 2020/01/24 17:17:56 found no layout file for "HTML" for "404": You should create a template file which matches Hugo Layouts Lookup Rules for this combination.
INFO 2020/01/24 17:17:56 found no layout file for "HTML" for "404": You should create a template file which matches Hugo Layouts Lookup Rules for this combination.

If I delete this, it's okay but I need add own raw html code from main pages

[kaushalmodi]

@bep Thank you. I confirm this fix. 404.html now generates fine.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.