[INFO] fetching crate canonical_host 0.5.0...
[INFO] checking canonical_host-0.5.0 against 1.95.0 for pr-155915
[INFO] extracting crate canonical_host 0.5.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate canonical_host 0.5.0
[INFO] finished tweaking crates.io crate canonical_host 0.5.0
[INFO] tweaked toml for crates.io crate canonical_host 0.5.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate canonical_host 0.5.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 103 packages to latest compatible versions
[INFO] [stderr]       Adding canonical v0.5.3 (available: v0.7.1)
[INFO] [stderr]       Adding canonical_derive v0.5.0 (available: v0.7.0)
[INFO] [stderr]       Adding parking_lot v0.11.2 (available: v0.12.5)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded canonical_derive v0.5.0
[INFO] [stderr]   Downloaded appendix v0.2.2
[INFO] [stderr]   Downloaded arbitrary v0.3.3
[INFO] [stderr]   Downloaded derive_arbitrary v0.3.3
[INFO] [stderr]   Downloaded canonical v0.5.3
[INFO] [stderr]   Downloaded seahash v3.0.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 9cbc5df97d30b4798e3f814626ba430e845b874c6596f5010c56d37eb520a613
[INFO] running `Command { std: "docker" "start" "-a" "9cbc5df97d30b4798e3f814626ba430e845b874c6596f5010c56d37eb520a613", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cbc5df97d30b4798e3f814626ba430e845b874c6596f5010c56d37eb520a613", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cbc5df97d30b4798e3f814626ba430e845b874c6596f5010c56d37eb520a613", kill_on_drop: false }`
[INFO] [stdout] 9cbc5df97d30b4798e3f814626ba430e845b874c6596f5010c56d37eb520a613
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2cb9ba7d69a2e5fceed4e6d2e6c7981041c3a915da2436ae9d54a6865aac1c14
[INFO] running `Command { std: "docker" "start" "-a" "2cb9ba7d69a2e5fceed4e6d2e6c7981041c3a915da2436ae9d54a6865aac1c14", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling arrayref v0.3.9
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking parking_lot_core v0.8.6
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]    Compiling derive_arbitrary v0.3.3
[INFO] [stderr]     Checking seahash v3.0.7
[INFO] [stderr]     Checking once_cell v1.21.4
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking tempfile v3.27.0
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]    Compiling blake2b_simd v0.3.1
[INFO] [stderr]     Checking appendix v0.2.2
[INFO] [stderr]    Compiling arbitrary v0.3.3
[INFO] [stderr]     Checking canonical v0.5.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/canonical-0.5.3/src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `canonical` (lib) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2cb9ba7d69a2e5fceed4e6d2e6c7981041c3a915da2436ae9d54a6865aac1c14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cb9ba7d69a2e5fceed4e6d2e6c7981041c3a915da2436ae9d54a6865aac1c14", kill_on_drop: false }`
[INFO] [stdout] 2cb9ba7d69a2e5fceed4e6d2e6c7981041c3a915da2436ae9d54a6865aac1c14