[INFO] fetching crate zip-longest 0.1.7...
[INFO] testing zip-longest-0.1.7 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate zip-longest 0.1.7 into /workspace/builds/worker-44/source
[INFO] validating manifest of crates.io crate zip-longest 0.1.7 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-44/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38e92a3ced68cead65fc63eb87a7124986782e2e0f6c049b16cb57cc0e2ce08d
[INFO] running `Command { std: "docker" "start" "-a" "38e92a3ced68cead65fc63eb87a7124986782e2e0f6c049b16cb57cc0e2ce08d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38e92a3ced68cead65fc63eb87a7124986782e2e0f6c049b16cb57cc0e2ce08d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38e92a3ced68cead65fc63eb87a7124986782e2e0f6c049b16cb57cc0e2ce08d", kill_on_drop: false }`
[INFO] [stdout] 38e92a3ced68cead65fc63eb87a7124986782e2e0f6c049b16cb57cc0e2ce08d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9836b0c41810100d378ed17e90901c9e98b309f041a148ec7226644d4dc6335
[INFO] running `Command { std: "docker" "start" "-a" "d9836b0c41810100d378ed17e90901c9e98b309f041a148ec7226644d4dc6335", 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core, step_by)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> lib.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core, step_by)]
[INFO] [stdout]   |                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core` has been stable since 1.6.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core, step_by)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `step_by`
[INFO] [stdout]  --> lib.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core, step_by)]
[INFO] [stdout]   |                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zip-longest` due to 5 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "d9836b0c41810100d378ed17e90901c9e98b309f041a148ec7226644d4dc6335", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9836b0c41810100d378ed17e90901c9e98b309f041a148ec7226644d4dc6335", kill_on_drop: false }`
[INFO] [stdout] d9836b0c41810100d378ed17e90901c9e98b309f041a148ec7226644d4dc6335