rustlings-traits2-compile-error.sh

! Compiling of exercises/traits/traits2.rs failed! Please try again. Here's the output:                                
error[E0308]: mismatched types                                                                                         
  --> exercises/traits/traits2.rs:21:9                                                                                 
   |                                                                                                                   
19 |     fn append_bar(&mut self) -> Self {                                                                            
   |                                 ---- expected `std::vec::Vec<std::string::String>` because of return type         
20 |         self.push(String::from("Bar"));                                                                           
21 |         self                                                                                                      
   |         ^^^^                                                                                                      
   |         |                                                                                                         
   |         expected struct `std::vec::Vec`, found mutable reference                                                  
   |         help: try using a conversion method: `self.to_vec()`                                                      
   |                                                                                                                   
   = note:         expected struct `std::vec::Vec<std::string::String>`                                                
           found mutable reference `&mut std::vec::Vec<std::string::String>`                                           
                                                                                                                       
error: aborting due to previous error                                                                                  
                                                                                                                       
For more information about this error, try `rustc --explain E0308`.                                                    
                                                                                                                       
Type 'hint' to get help