[INFO] crate qcollect-traits 0.7.4 is already in cache
[INFO] extracting crate qcollect-traits 0.7.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/qcollect-traits/0.7.4
[INFO] extracting crate qcollect-traits 0.7.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/qcollect-traits/0.7.4
[INFO] validating manifest of qcollect-traits-0.7.4 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of qcollect-traits-0.7.4 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing qcollect-traits-0.7.4
[INFO] finished frobbing qcollect-traits-0.7.4
[INFO] frobbed toml for qcollect-traits-0.7.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/qcollect-traits/0.7.4/Cargo.toml
[INFO] started frobbing qcollect-traits-0.7.4
[INFO] finished frobbing qcollect-traits-0.7.4
[INFO] frobbed toml for qcollect-traits-0.7.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/qcollect-traits/0.7.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing qcollect-traits-0.7.4 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/qcollect-traits/0.7.4:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] e4da9f0124be2d436993de8c9b96ef30e5d51885bdfe3b440069ec831768f11b
[INFO] running `"docker" "start" "-a" "e4da9f0124be2d436993de8c9b96ef30e5d51885bdfe3b440069ec831768f11b"`
[INFO] [stderr]    Compiling qcollect-traits v0.7.4 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | / #![feature(
[INFO] [stderr] 52 | |     associated_type_defaults,
[INFO] [stderr] 53 | |     collections, 
[INFO] [stderr] 54 | |     collections_bound, 
[INFO] [stderr] 55 | |     btree_range, 
[INFO] [stderr] 56 | |     drain,
[INFO] [stderr] 57 | | )]
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_Iterate<'_>>::Iter as std::iter::Iterator>::Item == <&'r T as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/core.rs:46:25
[INFO] [stderr]    |
[INFO] [stderr] 46 | impl<'r, 'a, T: ?Sized> _Iterate<'a> for &'r T
[INFO] [stderr]    |                         ^^^^^^^^^^^^ expected type parameter, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `<T as traits::_Iterate<'_>>::Item`
[INFO] [stderr]               found type `<&'r T as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_Iterate<'_>>::Iter as std::iter::Iterator>::Item == <&'r mut T as traits::_Iterate<'a>>::Item`
[INFO] [stderr]    --> src/impls/core.rs:127:25
[INFO] [stderr]     |
[INFO] [stderr] 127 | impl<'r, 'a, T: ?Sized> _Iterate<'a> for &'r mut T
[INFO] [stderr]     |                         ^^^^^^^^^^^^ expected type parameter, found mutable reference
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `<T as traits::_Iterate<'_>>::Item`
[INFO] [stderr]                found type `<&'r mut T as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_IterateMut<'_>>::IterMut as std::iter::Iterator>::Item == <&'r mut T as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]    --> src/impls/core.rs:139:25
[INFO] [stderr]     |
[INFO] [stderr] 139 | impl<'r, 'a, T: ?Sized> _IterateMut<'a> for &'r mut T
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^ expected type parameter, found mutable reference
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `<T as traits::_IterateMut<'_>>::Item`
[INFO] [stderr]                found type `<&'r mut T as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_Iterate<'_>>::Iter as std::iter::Iterator>::Item == <std::boxed::Box<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]    --> src/impls/core.rs:265:21
[INFO] [stderr]     |
[INFO] [stderr] 265 | impl<'a, T: ?Sized> _Iterate<'a> for Box<T>
[INFO] [stderr]     |                     ^^^^^^^^^^^^ expected type parameter, found struct `std::boxed::Box`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `<T as traits::_Iterate<'_>>::Item`
[INFO] [stderr]                found type `<std::boxed::Box<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_IterateMut<'_>>::IterMut as std::iter::Iterator>::Item == <std::boxed::Box<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]    --> src/impls/core.rs:277:21
[INFO] [stderr]     |
[INFO] [stderr] 277 | impl<'a, T: ?Sized> _IterateMut<'a> for Box<T>
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^ expected type parameter, found struct `std::boxed::Box`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `<T as traits::_IterateMut<'_>>::Item`
[INFO] [stderr]                found type `<std::boxed::Box<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::slice::Iter<'_, T> as std::iter::Iterator>::Item == <[T] as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/slice.rs:66:17
[INFO] [stderr]    |
[INFO] [stderr] 66 | impl<'a, T: 'a> _Iterate<'a> for [T] {
[INFO] [stderr]    |                 ^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<[T] as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::slice::IterMut<'_, T> as std::iter::Iterator>::Item == <[T] as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/slice.rs:74:17
[INFO] [stderr]    |
[INFO] [stderr] 74 | impl<'a, T: 'a> _IterateMut<'a> for [T] {
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^ expected &mut _, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut T`
[INFO] [stderr]               found type `<[T] as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::slice::Iter<'_, T> as std::iter::Iterator>::Item == <std::vec::Vec<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec.rs:81:17
[INFO] [stderr]    |
[INFO] [stderr] 81 | impl<'a, T: 'a> _Iterate<'a> for Vec<T> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<std::vec::Vec<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::slice::IterMut<'_, T> as std::iter::Iterator>::Item == <std::vec::Vec<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec.rs:89:17
[INFO] [stderr]    |
[INFO] [stderr] 89 | impl<'a, T: 'a> _IterateMut<'a> for Vec<T> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^ expected &mut _, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut T`
[INFO] [stderr]               found type `<std::vec::Vec<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::vec_deque::Iter<'_, T> as std::iter::Iterator>::Item == <std::collections::VecDeque<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec_deque.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 | impl<'a, T: 'a> _Iterate<'a> for VecDeque<T> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<std::collections::VecDeque<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::vec_deque::IterMut<'_, T> as std::iter::Iterator>::Item == <std::collections::VecDeque<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec_deque.rs:37:17
[INFO] [stderr]    |
[INFO] [stderr] 37 | impl<'a, T: 'a> _IterateMut<'a> for VecDeque<T> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^ expected &mut _, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut T`
[INFO] [stderr]               found type `<std::collections::VecDeque<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::linked_list::Iter<'_, T> as std::iter::Iterator>::Item == <std::collections::LinkedList<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/linked_list.rs:23:17
[INFO] [stderr]    |
[INFO] [stderr] 23 | impl<'a, T: 'a> _Iterate<'a> for LinkedList<T> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<std::collections::LinkedList<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::linked_list::IterMut<'_, T> as std::iter::Iterator>::Item == <std::collections::LinkedList<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/linked_list.rs:31:17
[INFO] [stderr]    |
[INFO] [stderr] 31 | impl<'a, T: 'a> _IterateMut<'a> for LinkedList<T> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^ expected &mut _, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut T`
[INFO] [stderr]               found type `<std::collections::LinkedList<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<bit_vec::Iter<'_> as std::iter::Iterator>::Item == <bit_vec::BitVec as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/bit_vec.rs:41:10
[INFO] [stderr]    |
[INFO] [stderr] 41 | impl<'a> _Iterate<'a> for BitVec {
[INFO] [stderr]    |          ^^^^^^^^^^^^ expected bool, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `bool`
[INFO] [stderr]               found type `<bit_vec::BitVec as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::btree_set::Iter<'_, T> as std::iter::Iterator>::Item == <std::collections::BTreeSet<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/btree_set.rs:33:23
[INFO] [stderr]    |
[INFO] [stderr] 33 | impl<'a, T: Ord + 'a> _Iterate<'a> for BTreeSet<T> {
[INFO] [stderr]    |                       ^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<std::collections::BTreeSet<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::btree_map::Iter<'_, K, V> as std::iter::Iterator>::Item == <std::collections::BTreeMap<K, V> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/btree_map.rs:58:30
[INFO] [stderr]    |
[INFO] [stderr] 58 | impl<'a, K: Ord + 'a, V: 'a> _Iterate<'a> for BTreeMap<K, V> {
[INFO] [stderr]    |                              ^^^^^^^^^^^^ expected tuple, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `(&K, &V)`
[INFO] [stderr]               found type `<std::collections::BTreeMap<K, V> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::btree_map::IterMut<'_, K, V> as std::iter::Iterator>::Item == <std::collections::BTreeMap<K, V> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/btree_map.rs:66:30
[INFO] [stderr]    |
[INFO] [stderr] 66 | impl<'a, K: Ord + 'a, V: 'a> _IterateMut<'a> for BTreeMap<K, V> {
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^ expected tuple, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `(&K, &mut V)`
[INFO] [stderr]               found type `<std::collections::BTreeMap<K, V> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<vec_map::Iter<'_, T> as std::iter::Iterator>::Item == <vec_map::VecMap<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec_map.rs:60:17
[INFO] [stderr]    |
[INFO] [stderr] 60 | impl<'a, T: 'a> _Iterate<'a> for VecMap<T> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^ expected tuple, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `(usize, &T)`
[INFO] [stderr]               found type `<vec_map::VecMap<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<vec_map::IterMut<'_, T> as std::iter::Iterator>::Item == <vec_map::VecMap<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec_map.rs:68:17
[INFO] [stderr]    |
[INFO] [stderr] 68 | impl<'a, T: 'a> _IterateMut<'a> for VecMap<T> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^ expected tuple, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `(usize, &mut T)`
[INFO] [stderr]               found type `<vec_map::VecMap<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_Iterate<'_>>::Iter as std::iter::Iterator>::Item == <&'r T as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/core.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (**self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `<T as traits::_Iterate<'_>>::Item`
[INFO] [stderr]               found type `<&'r T as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_Iterate<'_>>::Iter as std::iter::Iterator>::Item == <&'r mut T as traits::_Iterate<'a>>::Item`
[INFO] [stderr]    --> src/impls/core.rs:136:5
[INFO] [stderr]     |
[INFO] [stderr] 136 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (**self).iter() }
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter, found mutable reference
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `<T as traits::_Iterate<'_>>::Item`
[INFO] [stderr]                found type `<&'r mut T as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]    --> src/traits.rs:69:1
[INFO] [stderr]     |
[INFO] [stderr] 69  | pub trait _Iterate<'a> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_IterateMut<'_>>::IterMut as std::iter::Iterator>::Item == <&'r mut T as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]    --> src/impls/core.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 148 |     fn iter_mut<'a>(&'a mut self) -> <Self as _IterateMut<'a>>::IterMut { (**self).iter_mut() }
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter, found mutable reference
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `<T as traits::_IterateMut<'_>>::Item`
[INFO] [stderr]                found type `<&'r mut T as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] note: required by `traits::_IterateMut`
[INFO] [stderr]    --> src/traits.rs:79:1
[INFO] [stderr]     |
[INFO] [stderr] 79  | pub trait _IterateMut<'a> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_Iterate<'_>>::Iter as std::iter::Iterator>::Item == <std::boxed::Box<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]    --> src/impls/core.rs:274:5
[INFO] [stderr]     |
[INFO] [stderr] 274 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (**self).iter() }
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter, found struct `std::boxed::Box`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `<T as traits::_Iterate<'_>>::Item`
[INFO] [stderr]                found type `<std::boxed::Box<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]    --> src/traits.rs:69:1
[INFO] [stderr]     |
[INFO] [stderr] 69  | pub trait _Iterate<'a> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<<T as traits::_IterateMut<'_>>::IterMut as std::iter::Iterator>::Item == <std::boxed::Box<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]    --> src/impls/core.rs:286:5
[INFO] [stderr]     |
[INFO] [stderr] 286 |     fn iter_mut<'a>(&'a mut self) -> <Self as _IterateMut<'a>>::IterMut { (**self).iter_mut() }
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter, found struct `std::boxed::Box`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `<T as traits::_IterateMut<'_>>::Item`
[INFO] [stderr]                found type `<std::boxed::Box<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] note: required by `traits::_IterateMut`
[INFO] [stderr]    --> src/traits.rs:79:1
[INFO] [stderr]     |
[INFO] [stderr] 79  | pub trait _IterateMut<'a> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::slice::Iter<'_, T> as std::iter::Iterator>::Item == <[T] as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/slice.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (*self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<[T] as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::slice::IterMut<'_, T> as std::iter::Iterator>::Item == <[T] as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/slice.rs:79:5
[INFO] [stderr]    |
[INFO] [stderr] 79 |     fn iter_mut<'a>(&'a mut self) -> <Self as _IterateMut<'a>>::IterMut { (*self).iter_mut() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected &mut _, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut T`
[INFO] [stderr]               found type `<[T] as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] note: required by `traits::_IterateMut`
[INFO] [stderr]   --> src/traits.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub trait _IterateMut<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::slice::Iter<'_, T> as std::iter::Iterator>::Item == <std::vec::Vec<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec.rs:86:5
[INFO] [stderr]    |
[INFO] [stderr] 86 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (**self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<std::vec::Vec<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::slice::IterMut<'_, T> as std::iter::Iterator>::Item == <std::vec::Vec<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn iter_mut<'a>(&'a mut self) -> <Self as _IterateMut<'a>>::IterMut { (**self).iter_mut() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected &mut _, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut T`
[INFO] [stderr]               found type `<std::vec::Vec<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] note: required by `traits::_IterateMut`
[INFO] [stderr]   --> src/traits.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub trait _IterateMut<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::vec_deque::Iter<'_, T> as std::iter::Iterator>::Item == <std::collections::VecDeque<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec_deque.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (*self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<std::collections::VecDeque<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::vec_deque::IterMut<'_, T> as std::iter::Iterator>::Item == <std::collections::VecDeque<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec_deque.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn iter_mut<'a>(&'a mut self) -> <Self as _IterateMut<'a>>::IterMut { (*self).iter_mut() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected &mut _, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut T`
[INFO] [stderr]               found type `<std::collections::VecDeque<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] note: required by `traits::_IterateMut`
[INFO] [stderr]   --> src/traits.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub trait _IterateMut<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::linked_list::Iter<'_, T> as std::iter::Iterator>::Item == <std::collections::LinkedList<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/linked_list.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (*self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<std::collections::LinkedList<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::linked_list::IterMut<'_, T> as std::iter::Iterator>::Item == <std::collections::LinkedList<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/linked_list.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn iter_mut<'a>(&'a mut self) -> <Self as _IterateMut<'a>>::IterMut { (*self).iter_mut() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected &mut _, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&mut T`
[INFO] [stderr]               found type `<std::collections::LinkedList<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] note: required by `traits::_IterateMut`
[INFO] [stderr]   --> src/traits.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub trait _IterateMut<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<bit_vec::Iter<'_> as std::iter::Iterator>::Item == <bit_vec::BitVec as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/bit_vec.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (*self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected bool, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `bool`
[INFO] [stderr]               found type `<bit_vec::BitVec as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::btree_set::Iter<'_, T> as std::iter::Iterator>::Item == <std::collections::BTreeSet<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/btree_set.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (*self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected reference, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&T`
[INFO] [stderr]               found type `<std::collections::BTreeSet<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::btree_map::Iter<'_, K, V> as std::iter::Iterator>::Item == <std::collections::BTreeMap<K, V> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/btree_map.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (*self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected tuple, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `(&K, &V)`
[INFO] [stderr]               found type `<std::collections::BTreeMap<K, V> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<std::collections::btree_map::IterMut<'_, K, V> as std::iter::Iterator>::Item == <std::collections::BTreeMap<K, V> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/btree_map.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn iter_mut<'a>(&'a mut self) -> <Self as _IterateMut<'a>>::IterMut { (*self).iter_mut() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected tuple, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `(&K, &mut V)`
[INFO] [stderr]               found type `<std::collections::BTreeMap<K, V> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] note: required by `traits::_IterateMut`
[INFO] [stderr]   --> src/traits.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub trait _IterateMut<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<vec_map::Iter<'_, T> as std::iter::Iterator>::Item == <vec_map::VecMap<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec_map.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn iter<'a>(&'a self) -> <Self as _Iterate<'a>>::Iter { (*self).iter() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected tuple, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `(usize, &T)`
[INFO] [stderr]               found type `<vec_map::VecMap<T> as traits::_Iterate<'a>>::Item`
[INFO] [stderr] note: required by `traits::_Iterate`
[INFO] [stderr]   --> src/traits.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub trait _Iterate<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<vec_map::IterMut<'_, T> as std::iter::Iterator>::Item == <vec_map::VecMap<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr]   --> src/impls/vec_map.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     fn iter_mut<'a>(&'a mut self) -> <Self as _IterateMut<'a>>::IterMut { (*self).iter_mut() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected tuple, found associated type
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `(usize, &mut T)`
[INFO] [stderr]               found type `<vec_map::VecMap<T> as traits::_IterateMut<'a>>::Item`
[INFO] [stderr] note: required by `traits::_IterateMut`
[INFO] [stderr]   --> src/traits.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub trait _IterateMut<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 39 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0271, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0271`.
[INFO] [stderr] error: Could not compile `qcollect-traits`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e4da9f0124be2d436993de8c9b96ef30e5d51885bdfe3b440069ec831768f11b"`
[INFO] running `"docker" "rm" "-f" "e4da9f0124be2d436993de8c9b96ef30e5d51885bdfe3b440069ec831768f11b"`
[INFO] [stdout] e4da9f0124be2d436993de8c9b96ef30e5d51885bdfe3b440069ec831768f11b