[INFO] updating cached repository nathanfaucett/rs-vector
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nathanfaucett/rs-vector
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nathanfaucett/rs-vector" "work/ex/beta-1.38-1/sources/1.37.0/gh/nathanfaucett/rs-vector"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nathanfaucett/rs-vector'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nathanfaucett/rs-vector" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nathanfaucett/rs-vector"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nathanfaucett/rs-vector'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b5fb18b5547a6d58f314a1e86c6ab1ae355e2d73
[INFO] sha for GitHub repo nathanfaucett/rs-vector: b5fb18b5547a6d58f314a1e86c6ab1ae355e2d73
[INFO] validating manifest of nathanfaucett/rs-vector 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 nathanfaucett/rs-vector 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 nathanfaucett/rs-vector
[INFO] finished frobbing nathanfaucett/rs-vector
[INFO] frobbed toml for nathanfaucett/rs-vector written to work/ex/beta-1.38-1/sources/1.37.0/gh/nathanfaucett/rs-vector/Cargo.toml
[INFO] started frobbing nathanfaucett/rs-vector
[INFO] finished frobbing nathanfaucett/rs-vector
[INFO] frobbed toml for nathanfaucett/rs-vector written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nathanfaucett/rs-vector/Cargo.toml
[INFO] crate nathanfaucett/rs-vector already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing nathanfaucett/rs-vector 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nathanfaucett/rs-vector:/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] 5cd71ac4d4d1d731f85a2a9998ac1a86cf3221de280bb76882b94d51f8f06eb8
[INFO] running `"docker" "start" "-a" "5cd71ac4d4d1d731f85a2a9998ac1a86cf3221de280bb76882b94d51f8f06eb8"`
[INFO] [stderr]    Compiling collection_traits v0.1.0 (https://github.com/nathanfaucett/rs-collection_traits#a75d1c20)
[INFO] [stderr] error[E0432]: unresolved imports `alloc::linked_list`, `alloc::linked_list`
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/linked_list.rs:1:26
[INFO] [stderr]   |
[INFO] [stderr] 1 | use alloc::linked_list::{self, LinkedList};
[INFO] [stderr]   |            ^^^^^^^^^^^   ^^^^ no `linked_list` in the root
[INFO] [stderr]   |            |
[INFO] [stderr]   |            could not find `linked_list` in `alloc`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Iter` in module `linked_list`
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/linked_list.rs:75:30
[INFO] [stderr]    |
[INFO] [stderr] 75 |     type Iter = linked_list::Iter<'a, T>;
[INFO] [stderr]    |                              ^^^^ not found in `linked_list`
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::binary_heap::Iter;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::btree_map::Iter;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::btree_set::Iter;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::linked_list::Iter;
[INFO] [stderr]    |
[INFO] [stderr] and 5 other candidates
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `IterMut` in module `linked_list`
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/linked_list.rs:84:33
[INFO] [stderr]    |
[INFO] [stderr] 84 |     type IterMut = linked_list::IterMut<'a, T>;
[INFO] [stderr]    |                                 ^^^^^^^ not found in `linked_list`
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::btree_map::IterMut;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::linked_list::IterMut;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::collections::vec_deque::IterMut;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::slice::IterMut;
[INFO] [stderr]    |
[INFO] [stderr] and 3 other candidates
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(alloc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0207]: the type parameter `T` is not constrained by the impl trait, self type, or predicates
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/linked_list.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | impl<T> Collection for LinkedList<T> {
[INFO] [stderr]   |      ^ unconstrained type parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0207]: the type parameter `T` is not constrained by the impl trait, self type, or predicates
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/rs-collection_traits-dca7cc2c0ed7a0a9/a75d1c2/src/linked_list.rs:11:6
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl<T> CollectionMut for LinkedList<T> {
[INFO] [stderr]    |      ^ unconstrained type parameter
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0207, E0412, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0207`.
[INFO] [stderr] error: Could not compile `collection_traits`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5cd71ac4d4d1d731f85a2a9998ac1a86cf3221de280bb76882b94d51f8f06eb8"`
[INFO] running `"docker" "rm" "-f" "5cd71ac4d4d1d731f85a2a9998ac1a86cf3221de280bb76882b94d51f8f06eb8"`
[INFO] [stdout] 5cd71ac4d4d1d731f85a2a9998ac1a86cf3221de280bb76882b94d51f8f06eb8