Lint to check for dangling pointers when calling Vec::as_mut_ptr() (or other pointer types) when the vec goes out of scope without having an owner

I'm not entirely sure whether unsafe rust is in-scope for clippy, but if it is, I'd like to see a feature to detect (at least) the more obvious cases of a dangling pointer. Specifically, I had trouble figuring out what was causing my code to have bugs here:

https://github.com/microsoft/windows-rs/issues/1342

This is the offending bit:

let pwfilter = PWSTR(format!("{}\0", filter).encode_utf16().collect::<Vec<u16>>().as_mut_ptr());

This is how it should be written:

let cstr = format!("{}\0", filter).encode_utf16().collect::<Vec<u16>>();
let pwfilter = PWSTR(cstr.as_mut_ptr());

I'm still new to programming in general, especially rust, so I didn't really see this as a problem as I'm also used to the borrow checker working even in unsafe (though, as I've been taught, this isn't a borrow.) I rely on clippy a lot, so I think maybe this is something it could warn about?

No repository file or test is named. Start by examining how Clippy represents lints for unsafe Rust and whether the Vec::as_mut_ptr() temporary example can be detected, then use the linked windows-rs issue as context. Done means the agreed obvious dangling-pointer cases are detected without false positives and covered by tests.