[INFO] cloning repository https://github.com/conradludgate/cursed-strings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/conradludgate/cursed-strings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconradludgate%2Fcursed-strings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconradludgate%2Fcursed-strings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 798989cfd94182d1a7a7659989e51a273c14d415
[INFO] testing conradludgate/cursed-strings against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconradludgate%2Fcursed-strings" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/conradludgate/cursed-strings on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/conradludgate/cursed-strings
[INFO] finished tweaking git repo https://github.com/conradludgate/cursed-strings
[INFO] tweaked toml for git repo https://github.com/conradludgate/cursed-strings written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/conradludgate/cursed-strings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.author
[INFO] [stderr]     Updating git repository `https://github.com/conradludgate/generic-vec`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f5f98e1ad483ed8fd972121ee42e1dd324c1c9cea6d74fbebcad831fba8fd76
[INFO] running `Command { std: "docker" "start" "-a" "0f5f98e1ad483ed8fd972121ee42e1dd324c1c9cea6d74fbebcad831fba8fd76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f5f98e1ad483ed8fd972121ee42e1dd324c1c9cea6d74fbebcad831fba8fd76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f5f98e1ad483ed8fd972121ee42e1dd324c1c9cea6d74fbebcad831fba8fd76", kill_on_drop: false }`
[INFO] [stdout] 0f5f98e1ad483ed8fd972121ee42e1dd324c1c9cea6d74fbebcad831fba8fd76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fb360646204c67338e4e5ad0c23088636767943670225f77150cf2fa145821c
[INFO] running `Command { std: "docker" "start" "-a" "8fb360646204c67338e4e5ad0c23088636767943670225f77150cf2fa145821c", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.author
[INFO] [stderr]    Compiling generic-vec v0.1.3 (https://github.com/conradludgate/generic-vec#62c354f3)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/generic-vec-ebf22304652cebe4/62c354f/src/lib.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | /     feature(
[INFO] [stdout] 5  | |         trusted_len,
[INFO] [stdout] 6  | |         min_specialization,
[INFO] [stdout] 7  | |         exact_size_is_empty,
[INFO] [stdout] ...  |
[INFO] [stdout] 14 | |         doc_cfg,
[INFO] [stdout] 15 | |     )
[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 `generic-vec` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8fb360646204c67338e4e5ad0c23088636767943670225f77150cf2fa145821c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fb360646204c67338e4e5ad0c23088636767943670225f77150cf2fa145821c", kill_on_drop: false }`
[INFO] [stdout] 8fb360646204c67338e4e5ad0c23088636767943670225f77150cf2fa145821c