[INFO] fetching crate unsigned-float 0.2.2...
[INFO] checking unsigned-float-0.2.2 against 1.95.0 for pr-155915
[INFO] extracting crate unsigned-float 0.2.2 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate unsigned-float 0.2.2
[INFO] finished tweaking crates.io crate unsigned-float 0.2.2
[INFO] tweaked toml for crates.io crate unsigned-float 0.2.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate unsigned-float 0.2.2 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate unsigned-float 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67d0766d28248042a147ff8210817e49796acaa04e5437a317bbb0df23cef362
[INFO] running `Command { std: "docker" "start" "-a" "67d0766d28248042a147ff8210817e49796acaa04e5437a317bbb0df23cef362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67d0766d28248042a147ff8210817e49796acaa04e5437a317bbb0df23cef362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67d0766d28248042a147ff8210817e49796acaa04e5437a317bbb0df23cef362", kill_on_drop: false }`
[INFO] [stdout] 67d0766d28248042a147ff8210817e49796acaa04e5437a317bbb0df23cef362
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cc10be24268ce03430053fd169163af277fbd2197799c60a603c81b6008ddea
[INFO] running `Command { std: "docker" "start" "-a" "7cc10be24268ce03430053fd169163af277fbd2197799c60a603c81b6008ddea", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling unsigned-float v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> benches/arithmetic.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unsigned-float` (bench "arithmetic") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "7cc10be24268ce03430053fd169163af277fbd2197799c60a603c81b6008ddea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cc10be24268ce03430053fd169163af277fbd2197799c60a603c81b6008ddea", kill_on_drop: false }`
[INFO] [stdout] 7cc10be24268ce03430053fd169163af277fbd2197799c60a603c81b6008ddea
