error[E0433]: failed to resolve: use of undeclared type or module `io`
  --> $DIR/type-ascription-instead-of-path.rs:2:9
   |
LL |     std:io::stdin();
   |         ^^ use of undeclared type or module `io`

error[E0423]: expected value, found crate `std`
  --> $DIR/type-ascription-instead-of-path.rs:2:5
   |
LL |     std:io::stdin();
   |     ^^^- help: maybe you meant to write a path separator here: `::`
   |     |
   |     not a value

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0423, E0433.
For more information about an error, try `rustc --explain E0423`.