bug#38038: 27.0.50; Emacs freezes opening tabs.

[Juri Linkov]

> Hi when using emacs in gui I can't open a new tab if I add these lines
> to my config:
>
> (set-face-attribute 'tab-bar-tab nil
>        :weight 'ultra-bold :underline t)

Does Emacs freeze when you set the 'default' face to ultra-bold underline?

(set-face-attribute 'default nil
  :weight 'ultra-bold :underline t)

When I tried, it signals '(wrong-type-argument bufferp nil)'
in "command-error-default-function" and goes into infinite loop.
I have no idea what is wrong.