bug#63487: 30.0.50; C-M-u does not work correctly in c-ts-mode

[Eli Zaretskii]

> Date: Sat, 13 May 2023 19:37:39 +0200
> From:  Daniel Martín via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> 
> Steps to reproduce:
> 
> emacs -Q
> C-x b sample.c RET
> M-x c-ts-mode
> Write the following code:
> 
> int foo(int a, int b) {
>   
> }
> 
> With point inside the function, press C-M-u.
> 
> Actual result:
> 
> Emacs beeps and shows "At top level".
> 
> Expected result:
> 
> Point goes to the open { instead.

I hope Yuan will look into this soon.