bug#37623: 27.0.50; describe-key fails in tab-bar-mode

[Alex Branham <alex.branham@gmail.com>]

On Mon 07 Oct 2019 at 23:34, Juri Linkov <juri@linkov.net> wrote:

>> It appears as though describe-key fails when the mouse is pressed on a
>> non-currently-active tab in the tab-bar:
>>
>> emacs -Q
>> M-x tab-bar-mode
>> C-x b RET
>> C-h k (then click the mouse button on a non-currently-active tab):
>>
>> run-hook-with-args: Wrong type argument: symbolp, #[0 "ÁÀ!‡" [(tab
>> (name . "*scratch*") (time . 1570198894) (wc . #<window-configuration>)
>> (ws ((min-height . 4) (min-width . 10) (min-height-ignore . 2)
>> (min-width-ignore . 6) (min-height-safe . 1) (min-width-safe . 2)
>> (min-pixel-height . 68) (min-pixel-width . 80) (min-pixel-height-ignore
>> . 34) (min-pixel-width-ignore . 48) ...) leaf (pixel-width . 1600)
>> (pixel-height . 714) (total-width . 200) (total-height . 42)
>> (normal-height . 1.0) (normal-width . 1.0) (buffer "*scratch*" (selected
>> . t) (hscroll . 0) (fringes 8 8 nil nil) (margins nil) (scroll-bars nil
>> 2 t nil 0 t nil) (vscroll . 0) (dedicated) (point . 146) ...)))
>> tab-bar-select-tab] 2 nil nil]Cannot find image file
>> ‘/build/source/etc/images/tabs/close.xpm’
>
> From what I see, you clicked the mouse button on the tab close button,
> right?

Anywhere in a non-active tab, not just on the tab close button.

The message about the image file not being found is unrelated (probably,
anyway), seems to be another bug or issue with my build. I get *tons*
(thousands) of these messages but haven't had time to look into it yet:

Cannot find image file ‘/build/source/etc/images/tabs/close.xpm’
Cannot find image file ‘/build/source/etc/images/tabs/new.xpm’

Thanks,
Alex