Re: Error in C++ mode with Emacs 27.0.90

[Angelo Graziosi]

> Il 24 marzo 2020 alle 21.50 Angelo Graziosi ha scritto:
> 
> 
> I found an error with C++ mode which I can reproduce with this init.el:
> 
> -------------------------------------------
> $ cat init.el
> 
> ;; C/C++ modes
> (defun my-c-mode ()
>   "My customization for `c-mode' and `c++-mode'."
>   (interactive)
> 
>   ;; No indent for open bracket
>   (c-set-offset 'substatement-open 0)
> 
>   ;; Add index of func. to menu bar
>   (imenu-add-to-menubar "Functions")
>   )
> 
> ;; c++-mode
> (add-hook 'c++-mode-hook 'my-c-mode)
> 
> (setq imenu-auto-rescan t)
> 
> ;; The default is 60000
> (setq imenu-auto-rescan-maxout 500000)
> 
> ;; Show in which function is the cursor
> (which-function-mode 1)
> -------------------------------------------
> 
> (maybe it can be reduced...) and this test case:
> 
> -----------------------------------
> $ cat foobar.cpp
> int main()
> {
>   return 0;
> }
> -----------------------------------
> 
> When I visit it with C-x C-f, I get this error in minibuffer:
> 
> Error in menu-bar-update-hook (imenu-update-menubar): (wrong-type-argument 
> sequencep #<marker at 1 in foobar.cpp>)
> 
> The error disappears if I add a space before 'int main()', i.e. with ' int 
> main()'
> 
> I have seen that both on GNU/Linux and Windows builds of 27.0.90.
>

Both Emacs 27 branch and master are affected by this issue.

> Ciao, 
>   Angelo.