[INFO] fetching crate iter-identify_first_last 0.1.0...
[INFO] testing iter-identify_first_last-0.1.0 against beta-2023-04-20 for beta-1.70-1
[INFO] extracting crate iter-identify_first_last 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate iter-identify_first_last 0.1.0 on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate iter-identify_first_last 0.1.0
[INFO] finished tweaking crates.io crate iter-identify_first_last 0.1.0
[INFO] tweaked toml for crates.io crate iter-identify_first_last 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f215c55bbc9f10e052b8ee253beaf2baa5f3e360137d91e29d2455b0c48ff27f
[INFO] running `Command { std: "docker" "start" "-a" "f215c55bbc9f10e052b8ee253beaf2baa5f3e360137d91e29d2455b0c48ff27f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f215c55bbc9f10e052b8ee253beaf2baa5f3e360137d91e29d2455b0c48ff27f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f215c55bbc9f10e052b8ee253beaf2baa5f3e360137d91e29d2455b0c48ff27f", kill_on_drop: false }`
[INFO] [stdout] f215c55bbc9f10e052b8ee253beaf2baa5f3e360137d91e29d2455b0c48ff27f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5013ca688f5ae3f59de775c04cb3f22cb63ba906874784c6d619afb1ceccdd3
[INFO] running `Command { std: "docker" "start" "-a" "f5013ca688f5ae3f59de775c04cb3f22cb63ba906874784c6d619afb1ceccdd3", kill_on_drop: false }`
[INFO] [stderr]    Compiling litrs v0.2.3
[INFO] [stderr]    Compiling document-features v0.2.7
[INFO] [stderr]    Compiling iter-identify_first_last v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature="nightly", feature(trusted_len))]
[INFO] [stdout]   |                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `iter-identify_first_last` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f5013ca688f5ae3f59de775c04cb3f22cb63ba906874784c6d619afb1ceccdd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5013ca688f5ae3f59de775c04cb3f22cb63ba906874784c6d619afb1ceccdd3", kill_on_drop: false }`
[INFO] [stdout] f5013ca688f5ae3f59de775c04cb3f22cb63ba906874784c6d619afb1ceccdd3
