[INFO] cloning repository https://github.com/Plotnus/math-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Plotnus/math-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPlotnus%2Fmath-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPlotnus%2Fmath-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb6de10e73aa040ca5f35829c790f046d00675b7
[INFO] testing Plotnus/math-rs against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPlotnus%2Fmath-rs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Plotnus/math-rs on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Plotnus/math-rs
[INFO] finished tweaking git repo https://github.com/Plotnus/math-rs
[INFO] tweaked toml for git repo https://github.com/Plotnus/math-rs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/Plotnus/math-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 784d1bb58102d7610c1964d769767b8ecff8122327536d042270a0d4b4b5c0a9
[INFO] running `Command { std: "docker" "start" "-a" "784d1bb58102d7610c1964d769767b8ecff8122327536d042270a0d4b4b5c0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "784d1bb58102d7610c1964d769767b8ecff8122327536d042270a0d4b4b5c0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "784d1bb58102d7610c1964d769767b8ecff8122327536d042270a0d4b4b5c0a9", kill_on_drop: false }`
[INFO] [stdout] 784d1bb58102d7610c1964d769767b8ecff8122327536d042270a0d4b4b5c0a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f55b358c43956d1c0eaecbd37621c367cc67e2c9a1447bdd790e28db7328b362
[INFO] running `Command { std: "docker" "start" "-a" "f55b358c43956d1c0eaecbd37621c367cc67e2c9a1447bdd790e28db7328b362", kill_on_drop: false }`
[INFO] [stderr]    Compiling math 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(clamp)]
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `clamp` has been stable since 1.50.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(clamp)]
[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 `math` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f55b358c43956d1c0eaecbd37621c367cc67e2c9a1447bdd790e28db7328b362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f55b358c43956d1c0eaecbd37621c367cc67e2c9a1447bdd790e28db7328b362", kill_on_drop: false }`
[INFO] [stdout] f55b358c43956d1c0eaecbd37621c367cc67e2c9a1447bdd790e28db7328b362