[INFO] fetching crate zip-longest 0.1.7...
[INFO] testing zip-longest-0.1.7 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate zip-longest 0.1.7 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate zip-longest 0.1.7 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 zip-longest 0.1.7
[INFO] finished tweaking crates.io crate zip-longest 0.1.7
[INFO] tweaked toml for crates.io crate zip-longest 0.1.7 written to /workspace/builds/worker-0/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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 64d15a08321799763b3b18108ad36a8d576b31f754e927b947fb3d1a130f9b8d
[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" "64d15a08321799763b3b18108ad36a8d576b31f754e927b947fb3d1a130f9b8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64d15a08321799763b3b18108ad36a8d576b31f754e927b947fb3d1a130f9b8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64d15a08321799763b3b18108ad36a8d576b31f754e927b947fb3d1a130f9b8d", kill_on_drop: false }`
[INFO] [stdout] 64d15a08321799763b3b18108ad36a8d576b31f754e927b947fb3d1a130f9b8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 27b8985ad6abe5340b76a6abe44f5090f085d70eeeef179125510071b2990fad
[INFO] running `Command { std: "docker" "start" "-a" "27b8985ad6abe5340b76a6abe44f5090f085d70eeeef179125510071b2990fad", kill_on_drop: false }`
[INFO] [stderr]    Compiling zip-longest v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::iter::RandomAccessIterator`
[INFO] [stdout]  --> lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::iter::RandomAccessIterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `RandomAccessIterator` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core, step_by)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zip-longest`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "27b8985ad6abe5340b76a6abe44f5090f085d70eeeef179125510071b2990fad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27b8985ad6abe5340b76a6abe44f5090f085d70eeeef179125510071b2990fad", kill_on_drop: false }`
[INFO] [stdout] 27b8985ad6abe5340b76a6abe44f5090f085d70eeeef179125510071b2990fad