| This error occurs when the compiler was unable to infer the concrete type of a |
| variable. It can occur for several cases, the most common of which is a |
| mismatch in the expected type that the compiler inferred for a variable's |
| initializing expression, and the actual type explicitly assigned to the |
| variable. |
| |
| For example: |
| |
| ```compile_fail,E0308 |
| let x: i32 = "I am not a number!"; |
| // ~~~ ~~~~~~~~~~~~~~~~~~~~ |
| // | | |
| // | initializing expression; |
| // | compiler infers type `&str` |
| // | |
| // type `i32` assigned to variable `x` |
| ``` |
