[INFO] fetching crate ruspiro-i2c 0.4.0...
[INFO] testing ruspiro-i2c-0.4.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate ruspiro-i2c 0.4.0 into /workspace/builds/worker-57/source
[INFO] validating manifest of crates.io crate ruspiro-i2c 0.4.0 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] removed /workspace/builds/worker-57/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate ruspiro-i2c 0.4.0
[INFO] finished tweaking crates.io crate ruspiro-i2c 0.4.0
[INFO] tweaked toml for crates.io crate ruspiro-i2c 0.4.0 written to /workspace/builds/worker-57/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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dff12a519b163ec6e4f22ea3b9bd265a44f8893d9ae1ec3a4f2ef4e92089d086
[INFO] running `Command { std: "docker" "start" "-a" "dff12a519b163ec6e4f22ea3b9bd265a44f8893d9ae1ec3a4f2ef4e92089d086", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dff12a519b163ec6e4f22ea3b9bd265a44f8893d9ae1ec3a4f2ef4e92089d086", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dff12a519b163ec6e4f22ea3b9bd265a44f8893d9ae1ec3a4f2ef4e92089d086", kill_on_drop: false }`
[INFO] [stdout] dff12a519b163ec6e4f22ea3b9bd265a44f8893d9ae1ec3a4f2ef4e92089d086
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffb16c1dbe584dd5dbb592d673f497602d357ba759b8a6990b24bff20a95da68
[INFO] running `Command { std: "docker" "start" "-a" "ffb16c1dbe584dd5dbb592d673f497602d357ba759b8a6990b24bff20a95da68", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling ruspiro-register v0.5.5
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling ruspiro-lock v0.4.3
[INFO] [stderr]    Compiling ruspiro-interrupt v0.4.3
[INFO] [stderr]    Compiling paste v1.0.7
[INFO] [stderr]    Compiling ruspiro-arch-aarch64 v0.1.7
[INFO] [stderr]    Compiling ruspiro-mmio-register v0.1.4
[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/ruspiro-lock-0.4.3/src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(asm)]
[INFO] [stdout]   |            ^^^
[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 `ruspiro-lock` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ffb16c1dbe584dd5dbb592d673f497602d357ba759b8a6990b24bff20a95da68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffb16c1dbe584dd5dbb592d673f497602d357ba759b8a6990b24bff20a95da68", kill_on_drop: false }`
[INFO] [stdout] ffb16c1dbe584dd5dbb592d673f497602d357ba759b8a6990b24bff20a95da68