[INFO] fetching crate two-sided-vec 0.1.10...
[INFO] testing two-sided-vec-0.1.10 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate two-sided-vec 0.1.10 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate two-sided-vec 0.1.10 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate two-sided-vec 0.1.10
[INFO] finished tweaking crates.io crate two-sided-vec 0.1.10
[INFO] tweaked toml for crates.io crate two-sided-vec 0.1.10 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c07b9a75e825af39dc0bcae3e5ffa2290df199f3fb6f424e6cdb6935f56faf71
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c07b9a75e825af39dc0bcae3e5ffa2290df199f3fb6f424e6cdb6935f56faf71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c07b9a75e825af39dc0bcae3e5ffa2290df199f3fb6f424e6cdb6935f56faf71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c07b9a75e825af39dc0bcae3e5ffa2290df199f3fb6f424e6cdb6935f56faf71", kill_on_drop: false }`
[INFO] [stdout] c07b9a75e825af39dc0bcae3e5ffa2290df199f3fb6f424e6cdb6935f56faf71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68fe50dcb2deb68edcb7ba2c54277663a3b81eb73497a001288b2e6049eef37d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "68fe50dcb2deb68edcb7ba2c54277663a3b81eb73497a001288b2e6049eef37d", kill_on_drop: false }`
[INFO] [stderr]    Compiling two-sided-vec v0.1.10 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::alloc::AllocRef`
[INFO] [stdout]  --> src/raw.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::alloc::{handle_alloc_error, AllocRef, Global, Layout};
[INFO] [stdout]   |                                      ^^^^^^^^ no `AllocRef` in `alloc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     dropck_eyepatch, // Needed to bypass dropchk
[INFO] [stdout] 3 | |     allocator_api, // We need to allocate raw memory
[INFO] [stdout] 4 | |     alloc_layout_extra, // We need to allocate memory
[INFO] [stdout] 5 | |     trusted_len, // Trusted length iterators improve performance
[INFO] [stdout] 6 | |     min_specialization, // Used to improve extend performance
[INFO] [stdout] 7 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `alloc` found for struct `std::alloc::Global` in the current scope
[INFO] [stdout]   --> src/raw.rs:31:31
[INFO] [stdout]    |
[INFO] [stdout] 31 |             let memory = heap.alloc(layout)
[INFO] [stdout]    |                               ^^^^^ method not found in `std::alloc::Global`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `dealloc` found for struct `std::alloc::Global` in the current scope
[INFO] [stdout]   --> src/raw.rs:90:22
[INFO] [stdout]    |
[INFO] [stdout] 90 |                 heap.dealloc(
[INFO] [stdout]    |                      ^^^^^^^ method not found in `std::alloc::Global`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `two-sided-vec`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "68fe50dcb2deb68edcb7ba2c54277663a3b81eb73497a001288b2e6049eef37d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68fe50dcb2deb68edcb7ba2c54277663a3b81eb73497a001288b2e6049eef37d", kill_on_drop: false }`
[INFO] [stdout] 68fe50dcb2deb68edcb7ba2c54277663a3b81eb73497a001288b2e6049eef37d