gistfile1.txt

$ cargo script -e '#[derive(Copy)] struct S(std::marker::PhantomData<*const T>);'
   Compiling expr v0.1.0 (file:///Users/alex/.cargo/script-cache/expr-0658c6978a7ee620)
error[E0412]: cannot find type `T` in this scope
  --> expr.rs:18:69
   |
18 |     match {#[derive(Copy)] struct S(std::marker::PhantomData<*const T>);} {
   |                                                                     ^ did you mean `S`?

error[E0204]: the trait `Copy` may not be implemented for this type
  --> expr.rs:18:21
   |
18 |     match {#[derive(Copy)] struct S(std::marker::PhantomData<*const T>);} {
   |                     ^^^^            ----------------------------------- this field does not implement `Copy`

error: aborting due to 2 previous errors

Some errors occurred: E0204, E0412.
For more information about an error, try `rustc --explain E0204`.
error: Could not compile `expr`.