error: `crate_type` requires a value
  --> $DIR/invalid_crate_type_syntax.rs:12:1
   |
LL | #![crate_type(lib)]  //~ ERROR `crate_type` requires a value
   | ^^^^^^^^^^^^^^^^^^^
   |
   = note: for example: `#![crate_type="lib"]`

error[E0601]: `main` function not found in crate `invalid_crate_type_syntax`
   |
   = note: consider adding a `main` function to `$DIR/invalid_crate_type_syntax.rs`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0601`.