302 redirect loops when switching to https - because of do_action( 'setup_theme' );

[guaka]

I'm getting a 302 redirect loop when trying /wp-admin/customize.php
I pinpointed the problem to a call to do_action( 'setup_theme' );

Note it's still happening after disabling all plugins and switching to different themes (including 2014).

[guaka]

Found out that it's related to https.

If I revert to http there is no redirect loop.

I'm using https over cloudflare, so the server is actually only serving http.

[guaka]

Apparently it's not just me. The wordpress-https extension doesn't fix it.
See also ​http://wordpress.stackexchange.com/questions/163638/wordpress-https-redirect-loop

[jeremyfelt]

Hi @guaka, thanks for the report. It looks like this is a duplicate of #29708, which is fixed in trunk and intended to ship in 4.0.1 as well.