[INFO] crate immut_list 0.1.0 is already in cache
[INFO] extracting crate immut_list 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/immut_list/0.1.0
[INFO] extracting crate immut_list 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/immut_list/0.1.0
[INFO] validating manifest of immut_list-0.1.0 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 immut_list-0.1.0 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 immut_list-0.1.0
[INFO] finished frobbing immut_list-0.1.0
[INFO] frobbed toml for immut_list-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/immut_list/0.1.0/Cargo.toml
[INFO] started frobbing immut_list-0.1.0
[INFO] finished frobbing immut_list-0.1.0
[INFO] frobbed toml for immut_list-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/immut_list/0.1.0/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] 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing immut_list-0.1.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/immut_list/0.1.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] ff5ba523148b0ca21bed6b6e65c581673b6a2a65006f40498cb86808b83bf4c5
[INFO] running `"docker" "start" "-a" "ff5ba523148b0ca21bed6b6e65c581673b6a2a65006f40498cb86808b83bf4c5"`
[INFO] [stderr]    Compiling data_structure_traits v0.1.12
[INFO] [stderr] error[E0432]: unresolved import `alloc::vec_deque`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/collections/vec_deque.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use alloc::vec_deque::VecDeque;
[INFO] [stderr]   |            ^^^^^^^^^ could not find `vec_deque` in `alloc`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/lib.rs:1:35
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(not(feature = "std"), feature(alloc))]
[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/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/collections/vec_deque.rs:8:6
[INFO] [stderr]   |
[INFO] [stderr] 8 | impl<T> Collection for VecDeque<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/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/collections/vec_deque.rs:15:6
[INFO] [stderr]    |
[INFO] [stderr] 15 | impl<T> CollectionMut for VecDeque<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/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/collections/vec_deque.rs:99:6
[INFO] [stderr]    |
[INFO] [stderr] 99 | impl<T> Remove<usize> for VecDeque<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/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/collections/vec_deque.rs:146:6
[INFO] [stderr]     |
[INFO] [stderr] 146 | impl<T> Get<usize> for VecDeque<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/registry/src/github.com-1ecc6299db9ec823/data_structure_traits-0.1.12/src/collections/vec_deque.rs:154:6
[INFO] [stderr]     |
[INFO] [stderr] 154 | impl<T> GetMut<usize> for VecDeque<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, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0207`.
[INFO] [stderr] error: Could not compile `data_structure_traits`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ff5ba523148b0ca21bed6b6e65c581673b6a2a65006f40498cb86808b83bf4c5"`
[INFO] running `"docker" "rm" "-f" "ff5ba523148b0ca21bed6b6e65c581673b6a2a65006f40498cb86808b83bf4c5"`
[INFO] [stdout] ff5ba523148b0ca21bed6b6e65c581673b6a2a65006f40498cb86808b83bf4c5