**Description:**
The problem arises in L235 of swc_ecma_transforms_base/src/rename/mod.rs
```rs
unit!(visit_mut_fn_decl, FnDecl, true);
```
which calls `get_map` and evals to
```rs
node.visit_children_with(&mut v);
```
with `FnDecl` and `Analyzer` in L132. However, in `Analyzer`, a visit to raw function was not overloaded, so function arguments and function body are considered different scopes.
**Related issue:**
- Closes#7261.
