[INFO] fetching crate ruspiro-i2c 0.3.1...
[INFO] checking ruspiro-i2c-0.3.1 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate ruspiro-i2c 0.3.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ruspiro-i2c 0.3.1 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruspiro-i2c 0.3.1
[INFO] finished tweaking crates.io crate ruspiro-i2c 0.3.1
[INFO] tweaked toml for crates.io crate ruspiro-i2c 0.3.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "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" "+90442458ac46b1d5eed752c316da25450f67285b" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v0.6.13
[INFO] [stderr]   Downloaded unicode-xid v0.1.0
[INFO] [stderr]   Downloaded syn v0.15.44
[INFO] [stderr]   Downloaded ruspiro-singleton v0.3.1
[INFO] [stderr]   Downloaded ruspiro-interrupt v0.4.3
[INFO] [stderr]   Downloaded ruspiro-lock v0.3.3
[INFO] [stderr]   Downloaded ruspiro-register v0.4.3
[INFO] [stderr]   Downloaded ruspiro-interrupt-macros v0.2.1
[INFO] [stderr]   Downloaded ruspiro-timer v0.4.1
[INFO] [stderr]   Downloaded ruspiro-interrupt-core v0.3.1
[INFO] [stderr]   Downloaded ruspiro-interrupt v0.3.1
[INFO] [stderr]   Downloaded ruspiro-gpio v0.4.2
[INFO] [stderr]   Downloaded proc-macro2 v0.4.30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 617384ae3dac85c9d8034e04544ec89bdeac8312d050c7eb87c6f479d6664b07
[INFO] running `Command { std: "docker" "start" "-a" "617384ae3dac85c9d8034e04544ec89bdeac8312d050c7eb87c6f479d6664b07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "617384ae3dac85c9d8034e04544ec89bdeac8312d050c7eb87c6f479d6664b07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "617384ae3dac85c9d8034e04544ec89bdeac8312d050c7eb87c6f479d6664b07", kill_on_drop: false }`
[INFO] [stdout] 617384ae3dac85c9d8034e04544ec89bdeac8312d050c7eb87c6f479d6664b07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28a430fe62ba4e9655114d5ee3a5ebe0f659bd7ca41cf9ea67ee82330dd0f655
[INFO] running `Command { std: "docker" "start" "-a" "28a430fe62ba4e9655114d5ee3a5ebe0f659bd7ca41cf9ea67ee82330dd0f655", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]     Checking ruspiro-register v0.5.4
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking ruspiro-lock v0.4.2
[INFO] [stderr]    Compiling ruspiro-interrupt v0.4.3
[INFO] [stderr]     Checking ruspiro-lock v0.3.3
[INFO] [stderr]     Checking ruspiro-register v0.4.3
[INFO] [stderr]     Checking ruspiro-interrupt-core v0.3.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ruspiro-register-0.4.3/src/lib.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(llvm_asm, const_fn, doc_cfg)]
[INFO] [stdout]   |                      ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[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 E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruspiro-register`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "28a430fe62ba4e9655114d5ee3a5ebe0f659bd7ca41cf9ea67ee82330dd0f655", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28a430fe62ba4e9655114d5ee3a5ebe0f659bd7ca41cf9ea67ee82330dd0f655", kill_on_drop: false }`
[INFO] [stdout] 28a430fe62ba4e9655114d5ee3a5ebe0f659bd7ca41cf9ea67ee82330dd0f655