error[E0015]: `?` cannot determine the branch of `T` in constant functions
  --> $DIR/trait-default-body-stability.rs:44:9
   |
LL |         T?
   |         ^^
   |
note: impl defined here, but it is not `const`
  --> $DIR/trait-default-body-stability.rs:18:1
   |
LL | impl const Try for T {
   | ^^^^^^^^^^^^^^^^^^^^
   = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants

error[E0015]: `?` cannot convert from residual of `T` in constant functions
  --> $DIR/trait-default-body-stability.rs:44:9
   |
LL |         T?
   |         ^^
   |
note: impl defined here, but it is not `const`
  --> $DIR/trait-default-body-stability.rs:33:1
   |
LL | impl const FromResidual for T {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0015`.