error[E0277]: the trait bound `A: Default` is not satisfied
  --> $DIR/derive-const-non-const-type.rs:10:14
   |
LL | #[derive_const(Default)]
   |                ------- in this derive macro expansion
LL | pub struct S(A);
   |              ^ the trait `~const Default` is not implemented for `A`
   |
note: the trait `Default` is implemented for `A`, but that implementation is not `const`
  --> $DIR/derive-const-non-const-type.rs:10:14
   |
LL | #[derive_const(Default)]
   |                ------- in this derive macro expansion
LL | pub struct S(A);
   |              ^
   = note: this error originates in the derive macro `Default` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider annotating `A` with `#[derive(Default)]`
   |
LL + #[derive(Default)]
LL | pub struct A;
   |

error[E0015]: cannot call non-const fn `<A as Default>::default` in constant functions
  --> $DIR/derive-const-non-const-type.rs:10:14
   |
LL | #[derive_const(Default)]
   |                ------- in this derive macro expansion
LL | pub struct S(A);
   |              ^
   |
   = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
   = help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
   = note: this error originates in the derive macro `Default` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0015, E0277.
For more information about an error, try `rustc --explain E0015`.