[INFO] cloning repository https://github.com/ben0x539/narrow_box
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ben0x539/narrow_box" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben0x539%2Fnarrow_box", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben0x539%2Fnarrow_box'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9c88328ff25f73476859f40af80a7a50f8a531d6
[INFO] testing ben0x539/narrow_box against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben0x539%2Fnarrow_box" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ben0x539/narrow_box on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ben0x539/narrow_box
[INFO] finished tweaking git repo https://github.com/ben0x539/narrow_box
[INFO] tweaked toml for git repo https://github.com/ben0x539/narrow_box written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/ben0x539/narrow_box already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ce5e4c4c59b17ac434e0a8b49b31c060206d1a12ef8727ca080c3a7638887cc
[INFO] running `Command { std: "docker" "start" "-a" "3ce5e4c4c59b17ac434e0a8b49b31c060206d1a12ef8727ca080c3a7638887cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ce5e4c4c59b17ac434e0a8b49b31c060206d1a12ef8727ca080c3a7638887cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ce5e4c4c59b17ac434e0a8b49b31c060206d1a12ef8727ca080c3a7638887cc", kill_on_drop: false }`
[INFO] [stdout] 3ce5e4c4c59b17ac434e0a8b49b31c060206d1a12ef8727ca080c3a7638887cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdd6bac549051ffb93da86a44c3f2219336a1e0ef73c7639649c87f03439df9b
[INFO] running `Command { std: "docker" "start" "-a" "fdd6bac549051ffb93da86a44c3f2219336a1e0ef73c7639649c87f03439df9b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling narrow_box v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(extern_types, ptr_metadata, unsize, coerce_unsized, 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 `narrow_box` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "fdd6bac549051ffb93da86a44c3f2219336a1e0ef73c7639649c87f03439df9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdd6bac549051ffb93da86a44c3f2219336a1e0ef73c7639649c87f03439df9b", kill_on_drop: false }`
[INFO] [stdout] fdd6bac549051ffb93da86a44c3f2219336a1e0ef73c7639649c87f03439df9b