[INFO] fetching crate r3_port_arm 0.2.3...
[INFO] testing r3_port_arm-0.2.3 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate r3_port_arm 0.2.3 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate r3_port_arm 0.2.3
[INFO] finished tweaking crates.io crate r3_port_arm 0.2.3
[INFO] tweaked toml for crates.io crate r3_port_arm 0.2.3 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate r3_port_arm 0.2.3 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "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" "+1.99.0-beta.8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 33 packages to highest compatible versions
[INFO] [stderr]       Adding memoffset v0.6.5 (available: v0.9.1)
[INFO] [stderr]       Adding tock-registers v0.7.0 (available: v0.10.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded svgbobdoc v0.3.0
[INFO] [stderr]   Downloaded r3_portkit v0.2.3
[INFO] [stderr]   Downloaded tock-registers v0.7.0
[INFO] [stderr]   Downloaded tokenlock v0.3.8
[INFO] [stderr]   Downloaded macropol v0.1.4
[INFO] [stderr]   Downloaded r3_kernel v0.1.4
[INFO] [stderr]   Downloaded elain v0.3.1
[INFO] [stderr]   Downloaded r0 v1.0.0
[INFO] [stderr]   Downloaded r3_core v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77
[INFO] running `Command { std: "docker" "start" "76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling darling_core v0.23.0
[INFO] [stderr]    Compiling tokenlock v0.3.8
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling elain v0.3.1
[INFO] [stderr]    Compiling either v1.19.0
[INFO] [stderr]    Compiling r3_port_arm v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling tock-registers v0.7.0
[INFO] [stderr]    Compiling r0 v1.0.0
[INFO] [stderr]    Compiling num-integer v0.1.47
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/tock-registers-0.7.0/src/lib.rs:56:1
[INFO] [stdout]    |
[INFO] [stdout] 56 | #![feature(const_fn_trait_bound)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_fn_trait_bound` has been stable since `1.61.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tock-registers` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77", kill_on_drop: false }`
[INFO] [stdout] 76b9d25e0cdd2240205efe70b6d5d46eaa57b4697cf9837d4ae5a06101a7eb77
