[INFO] cloning repository https://github.com/range3/rust-tx-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/range3/rust-tx-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frange3%2Frust-tx-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frange3%2Frust-tx-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] df36099221c3d8739ffb94fc39a455004aa0b610
[INFO] testing range3/rust-tx-practice against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frange3%2Frust-tx-practice" "/workspace/builds/worker-27/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-27/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/range3/rust-tx-practice 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/range3/rust-tx-practice
[INFO] finished tweaking git repo https://github.com/range3/rust-tx-practice
[INFO] tweaked toml for git repo https://github.com/range3/rust-tx-practice written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] crate git repo https://github.com/range3/rust-tx-practice 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-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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] 2311373f5059cf1635dde2be6889ab7bd97d4b20ca8fe06f43d0273770f1ec22
[INFO] running `Command { std: "docker" "start" "-a" "2311373f5059cf1635dde2be6889ab7bd97d4b20ca8fe06f43d0273770f1ec22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2311373f5059cf1635dde2be6889ab7bd97d4b20ca8fe06f43d0273770f1ec22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2311373f5059cf1635dde2be6889ab7bd97d4b20ca8fe06f43d0273770f1ec22", kill_on_drop: false }`
[INFO] [stdout] 2311373f5059cf1635dde2be6889ab7bd97d4b20ca8fe06f43d0273770f1ec22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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] e0ab3fb6cf6f4e8fb1b1c4f9f4be9808fb0b2d940d722194210ec40d484787c7
[INFO] running `Command { std: "docker" "start" "-a" "e0ab3fb6cf6f4e8fb1b1c4f9f4be9808fb0b2d940d722194210ec40d484787c7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling b2pl v0.1.0 (/opt/rustwide/workdir/crates/b2pl)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> crates/b2pl/src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_float)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `duration_float` has been stable since 1.38.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> crates/b2pl/src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_float)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `b2pl` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "e0ab3fb6cf6f4e8fb1b1c4f9f4be9808fb0b2d940d722194210ec40d484787c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0ab3fb6cf6f4e8fb1b1c4f9f4be9808fb0b2d940d722194210ec40d484787c7", kill_on_drop: false }`
[INFO] [stdout] e0ab3fb6cf6f4e8fb1b1c4f9f4be9808fb0b2d940d722194210ec40d484787c7