[clang] [RFC] Initial implementation of P2719 (PR #113510)

[Oliver Hunt via cfe-commits]

ojhunt wrote:

> We have tracked down a new and spurious "This variable is used uninitialized" to this PR. I'm working on a reduced test case now. It looks like this:
> 
> ```
> <redacted>.cpp:XXX+2:13: error: variable 'new_section' is uninitialized when used here [-Werror,-Wuninitialized]
> 572 |             new_section->SetNext(file_mod->Next()) ;
> 
>       |             ^~~~~~~~~~~
> <redacted>.cpp:XXX:33: note: initialize the variable 'new_section' to silence this warning
>   570 |             FileMod *new_section = new FileMod(insert_line, insert_col) ;
>       |                                 ^
> ```
> 
> There is no control flow on line XXX+1.

Does FileMode have custom operator new or delete?

https://github.com/llvm/llvm-project/pull/113510