[INFO] fetching crate r3_port_riscv 0.2.1...
[INFO] testing r3_port_riscv-0.2.1 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate r3_port_riscv 0.2.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate r3_port_riscv 0.2.1 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 crates.io crate r3_port_riscv 0.2.1
[INFO] finished tweaking crates.io crate r3_port_riscv 0.2.1
[INFO] tweaked toml for crates.io crate r3_port_riscv 0.2.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 33e8e8a018cfb02d4c24b141af4bab3f4e42caf15c64b9bd618e6f910892d2ed
[INFO] running `Command { std: "docker" "start" "-a" "33e8e8a018cfb02d4c24b141af4bab3f4e42caf15c64b9bd618e6f910892d2ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33e8e8a018cfb02d4c24b141af4bab3f4e42caf15c64b9bd618e6f910892d2ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33e8e8a018cfb02d4c24b141af4bab3f4e42caf15c64b9bd618e6f910892d2ed", kill_on_drop: false }`
[INFO] [stdout] 33e8e8a018cfb02d4c24b141af4bab3f4e42caf15c64b9bd618e6f910892d2ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5e01a54fd286006f341f2ae68365a8b5779ed88658d3a5d95ffa9ae0623f23e2
[INFO] running `Command { std: "docker" "start" "-a" "5e01a54fd286006f341f2ae68365a8b5779ed88658d3a5d95ffa9ae0623f23e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling tokenlock v0.3.7
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling seq-macro v0.3.0
[INFO] [stderr]    Compiling elain v0.3.0
[INFO] [stderr]    Compiling bare-metal v1.0.0
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling r0 v1.0.0
[INFO] [stderr]    Compiling tock-registers v0.7.0
[INFO] [stderr]    Compiling unstringify v0.1.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling riscv-target v0.1.2
[INFO] [stderr]    Compiling svgbobdoc v0.3.0
[INFO] [stderr]    Compiling macropol v0.1.2
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/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] error: aborting due to previous error
[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` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5e01a54fd286006f341f2ae68365a8b5779ed88658d3a5d95ffa9ae0623f23e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e01a54fd286006f341f2ae68365a8b5779ed88658d3a5d95ffa9ae0623f23e2", kill_on_drop: false }`
[INFO] [stdout] 5e01a54fd286006f341f2ae68365a8b5779ed88658d3a5d95ffa9ae0623f23e2