Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.03s
     Running `target/debug/puyo-lang`
Error: 
   ╭─[ input:1:7 ]
   │
 1 │ a b ->1 c ->2 ->a ->(1 2 3)
   │       ┬  
   │       ╰── Set target must be a variable
───╯
Error: 
   ╭─[ input:1:13 ]
   │
 1 │ a b ->1 c ->2 ->a ->(1 2 3)
   │             ┬  
   │             ╰── Set target must be a variable
───╯
Error: 
   ╭─[ input:1:21 ]
   │
 1 │ a b ->1 c ->2 ->a ->(1 2 3)
   │                     ───┬───  
   │                        ╰───── Set target must be a variable
───╯