compiler/rustc_error_codes/src/error_codes/E0131.md

   1 The `main` function was defined with generic parameters.
   2
   3 Erroneous code example:
   4
   5 ```compile_fail,E0131
   6 fn main<T>() { // error: main function is not allowed to have generic parameters
   7 }
   8 ```
   9
  10 It is not possible to define the `main` function with generic parameters.
  11 It must not take any arguments.