[INFO] fetching crate rlibcex 0.1.2...
[INFO] testing rlibcex-0.1.2 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate rlibcex 0.1.2 into /workspace/builds/worker-55/source
[INFO] validating manifest of crates.io crate rlibcex 0.1.2 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rlibcex 0.1.2
[INFO] finished tweaking crates.io crate rlibcex 0.1.2
[INFO] tweaked toml for crates.io crate rlibcex 0.1.2 written to /workspace/builds/worker-55/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-2022-02-22" "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-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd3d772b637463260f4a4a9e7d8c7a06451236b845a5fc0a5c9751a0b2d81315
[INFO] running `Command { std: "docker" "start" "-a" "fd3d772b637463260f4a4a9e7d8c7a06451236b845a5fc0a5c9751a0b2d81315", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd3d772b637463260f4a4a9e7d8c7a06451236b845a5fc0a5c9751a0b2d81315", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd3d772b637463260f4a4a9e7d8c7a06451236b845a5fc0a5c9751a0b2d81315", kill_on_drop: false }`
[INFO] [stdout] fd3d772b637463260f4a4a9e7d8c7a06451236b845a5fc0a5c9751a0b2d81315
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 344b04d0d15c31f8c0e5eebe2419c18be53d04f550354960a3c694111c4e67f2
[INFO] running `Command { std: "docker" "start" "-a" "344b04d0d15c31f8c0e5eebe2419c18be53d04f550354960a3c694111c4e67f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling rlibcex v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "344b04d0d15c31f8c0e5eebe2419c18be53d04f550354960a3c694111c4e67f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "344b04d0d15c31f8c0e5eebe2419c18be53d04f550354960a3c694111c4e67f2", kill_on_drop: false }`
[INFO] [stdout] 344b04d0d15c31f8c0e5eebe2419c18be53d04f550354960a3c694111c4e67f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb01a441cc72b2e5727f854866e4f036789e74ee5ce71646d4ecdfbb8000776c
[INFO] running `Command { std: "docker" "start" "-a" "cb01a441cc72b2e5727f854866e4f036789e74ee5ce71646d4ecdfbb8000776c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rlibcex v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:27
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![cfg_attr(test, feature(test))]
[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 `rlibcex` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "cb01a441cc72b2e5727f854866e4f036789e74ee5ce71646d4ecdfbb8000776c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb01a441cc72b2e5727f854866e4f036789e74ee5ce71646d4ecdfbb8000776c", kill_on_drop: false }`
[INFO] [stdout] cb01a441cc72b2e5727f854866e4f036789e74ee5ce71646d4ecdfbb8000776c