*shell*.bash

> rustc +nightly -Vv
rustc 1.28.0-nightly (f28c7aef7 2018-06-19)
binary: rustc
commit-hash: f28c7aef7fbff1909c2d0257186cd7a5f0c6aa4b
commit-date: 2018-06-19
host: x86_64-unknown-linux-gnu
release: 1.28.0-nightly
LLVM version: 6.0
> rustc +nightly error-codes/E0657.rs 
error[E0657]: `impl Trait` can only capture lifetimes bound at the fn or impl level
  --> error-codes/E0657.rs:19:31
   |
19 |     -> Box<for<'a> Id<impl Lt<'a>>>
   |                               ^^

error[E0657]: `impl Trait` can only capture lifetimes bound at the fn or impl level
  --> error-codes/E0657.rs:28:35
   |
28 |         -> Box<for<'a> Id<impl Lt<'a>>>
   |                                   ^^

thread 'main' panicked at 'assertion failed: !erased_self_ty.has_escaping_regions()', librustc/ty/util.rs:369:9
note: Run with `RUST_BACKTRACE=1` for a backtrace.
error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0657`.

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.28.0-nightly (f28c7aef7 2018-06-19) running on x86_64-unknown-linux-gnu

> rustc +nightly impl_trait_projections.rs 
error[E0667]: `impl Trait` is not allowed in path parameters
  --> impl_trait_projections.rs:21:51
   |
21 | fn projection_is_disallowed(x: impl Iterator) -> <impl Iterator>::Item {
   |                                                   ^^^^^^^^^^^^^

error[E0667]: `impl Trait` is not allowed in path parameters
  --> impl_trait_projections.rs:28:9
   |
28 |     -> <impl Iterator as Iterator>::Item
   |         ^^^^^^^^^^^^^

error[E0667]: `impl Trait` is not allowed in path parameters
  --> impl_trait_projections.rs:35:27
   |
35 |     -> <::std::ops::Range<impl Debug> as Iterator>::Item
   |                           ^^^^^^^^^^

error[E0667]: `impl Trait` is not allowed in path parameters
  --> impl_trait_projections.rs:42:29
   |
42 |     -> <dyn Iterator<Item = impl Debug> as Iterator>::Item
   |                             ^^^^^^^^^^

error[E0223]: ambiguous associated type
  --> impl_trait_projections.rs:21:50
   |
21 | fn projection_is_disallowed(x: impl Iterator) -> <impl Iterator>::Item {
   |                                                  ^^^^^^^^^^^^^^^^^^^^^ ambiguous associated type
   |
   = note: specify the type using the syntax `<impl std::iter::Iterator as Trait>::Item`

thread 'main' panicked at 'no entry found for key', libcore/option.rs:960:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.
error: aborting due to 5 previous errors

Some errors occurred: E0223, E0667.
For more information about an error, try `rustc --explain E0223`.

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.28.0-nightly (f28c7aef7 2018-06-19) running on x86_64-unknown-linux-gnu