Clippy doesnt see that value has been moved before suggesting

Summary

Basically it didn't see that a value is moved when it suggested and the suggested code doesn't work

Lint Name

map_entry

Reproducer

I tried this code:

        if self.labels.contains_key(&label) {
            return Err(Box::new(SyntaxError(
                format!(
                    "Label '{}' has already been defined and cannot be redefined",
                    label
                ),
                self.current_token().position.clone(),
            )));
        } else {
            if label == "main" {
                self.has_main = true;
            }
            self.labels.insert(label, 0);
        }

I saw this happen:

warning: usage of `contains_key` followed by `insert` on a `HashMap`
   --> src/parser.rs:291:9
    |
291 | /         if self.labels.contains_key(&label) {
292 | |             return Err(Box::new(SyntaxError(
293 | |                 format!(
294 | |                     "Label '{}' has already been defined and cannot be redefined",
...   |
303 | |             self.labels.insert(label, 0);
304 | |         }
    | |_________^
    |
    = note: `#[warn(clippy::map_entry)]` on by default
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
help: try this
    |
291 ~         if let std::collections::hash_map::Entry::Vacant(e) = self.labels.entry(label) {
292 +             if label == "main" {
293 +                 self.has_main = true;
294 +             }
295 +             e.insert(0);
296 +         } else {
  ...

I expected to see this happen:
I didn't expect it to give me wrong code, but I made some changes and it now no longer complains:

        match self.labels.entry(label) {
            Entry::Vacant(e) => {
                if e.key() == "main" {
                    self.has_main = true;
                }
                e.insert(0);
            }
            Entry::Occupied(e) => {
                return Err(Box::new(SyntaxError(
                    format!(
                        "Label '{}' has already been defined and cannot be redefined",
                        e.key()
                    ),
                    self.current_token().position.clone(),
                )));
            }
        }

Version

rustc 1.61.0 (fe5b13d68 2022-05-18)
binary: rustc
commit-hash: fe5b13d681f25ee6474be29d748c65adcd91f69e
commit-date: 2022-05-18
host: x86_64-unknown-linux-gnu
release: 1.61.0
LLVM version: 14.0.0

Additional Labels

@rustbot label +map_entry-suggestion-causes-error

Start with the map_entry lint and reproduce the warning using the Rust example in the issue. Compare the generated suggestion with the working Entry::Vacant/Occupied rewrite shown, then verify that the suggested code compiles and preserves the moved value. The issue provides no file or test entry point.