[INFO] fetching crate exact-conv 0.2.1...
[INFO] testing exact-conv-0.2.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate exact-conv 0.2.1 into /workspace/builds/worker-42/source
[INFO] validating manifest of crates.io crate exact-conv 0.2.1 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 crates.io crate exact-conv 0.2.1
[INFO] finished tweaking crates.io crate exact-conv 0.2.1
[INFO] tweaked toml for crates.io crate exact-conv 0.2.1 written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate crates.io crate exact-conv 0.2.1 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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] 408eab11b31ebe1bd99a27aa23d8866ce8bb5b9e9226e821b2cf3967d374358f
[INFO] running `Command { std: "docker" "start" "-a" "408eab11b31ebe1bd99a27aa23d8866ce8bb5b9e9226e821b2cf3967d374358f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "408eab11b31ebe1bd99a27aa23d8866ce8bb5b9e9226e821b2cf3967d374358f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "408eab11b31ebe1bd99a27aa23d8866ce8bb5b9e9226e821b2cf3967d374358f", kill_on_drop: false }`
[INFO] [stdout] 408eab11b31ebe1bd99a27aa23d8866ce8bb5b9e9226e821b2cf3967d374358f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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] a7a470994f1c8bf9d3c762f1040c1ecad3fda15d8a93f705804deddd31e1377f
[INFO] running `Command { std: "docker" "start" "-a" "a7a470994f1c8bf9d3c762f1040c1ecad3fda15d8a93f705804deddd31e1377f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling exact-conv v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.73s
[INFO] running `Command { std: "docker" "inspect" "a7a470994f1c8bf9d3c762f1040c1ecad3fda15d8a93f705804deddd31e1377f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7a470994f1c8bf9d3c762f1040c1ecad3fda15d8a93f705804deddd31e1377f", kill_on_drop: false }`
[INFO] [stdout] a7a470994f1c8bf9d3c762f1040c1ecad3fda15d8a93f705804deddd31e1377f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bab29634906232338c5d80773dc7e1895dab52c3038497ba9d43d3678994ec37
[INFO] running `Command { std: "docker" "start" "-a" "bab29634906232338c5d80773dc7e1895dab52c3038497ba9d43d3678994ec37", kill_on_drop: false }`
[INFO] [stderr]    Compiling exact-conv v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> examples/ieee754.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(int_bits_const)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `int_bits_const` has been stable since 1.53.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> examples/ieee754.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(int_bits_const)]
[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 `exact-conv` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bab29634906232338c5d80773dc7e1895dab52c3038497ba9d43d3678994ec37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bab29634906232338c5d80773dc7e1895dab52c3038497ba9d43d3678994ec37", kill_on_drop: false }`
[INFO] [stdout] bab29634906232338c5d80773dc7e1895dab52c3038497ba9d43d3678994ec37