[INFO] fetching crate target-cpu-macro 0.1.3...
[INFO] testing target-cpu-macro-0.1.3 against 1.60.0 for beta-1.61-1
[INFO] extracting crate target-cpu-macro 0.1.3 into /workspace/builds/worker-50/source
[INFO] validating manifest of crates.io crate target-cpu-macro 0.1.3 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate target-cpu-macro 0.1.3
[INFO] finished tweaking crates.io crate target-cpu-macro 0.1.3
[INFO] tweaked toml for crates.io crate target-cpu-macro 0.1.3 written to /workspace/builds/worker-50/source/Cargo.toml
[INFO] crate crates.io crate target-cpu-macro 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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 target-cpu-fetch v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 29735d824e66cc4516bb87d19ae7b081663dee4c023ba0b801dd80202152a7de
[INFO] running `Command { std: "docker" "start" "-a" "29735d824e66cc4516bb87d19ae7b081663dee4c023ba0b801dd80202152a7de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "29735d824e66cc4516bb87d19ae7b081663dee4c023ba0b801dd80202152a7de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29735d824e66cc4516bb87d19ae7b081663dee4c023ba0b801dd80202152a7de", kill_on_drop: false }`
[INFO] [stdout] 29735d824e66cc4516bb87d19ae7b081663dee4c023ba0b801dd80202152a7de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/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" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22ba275f5bf56dc7e51ea72fc298d37e7f1142204ee506f9f3f53f957375eb71
[INFO] running `Command { std: "docker" "start" "-a" "22ba275f5bf56dc7e51ea72fc298d37e7f1142204ee506f9f3f53f957375eb71", kill_on_drop: false }`
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling target-cpu-fetch v0.1.3
[INFO] [stderr]    Compiling target-cpu-macro v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(proc_macro_hygiene)]
[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 `target-cpu-macro` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "22ba275f5bf56dc7e51ea72fc298d37e7f1142204ee506f9f3f53f957375eb71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22ba275f5bf56dc7e51ea72fc298d37e7f1142204ee506f9f3f53f957375eb71", kill_on_drop: false }`
[INFO] [stdout] 22ba275f5bf56dc7e51ea72fc298d37e7f1142204ee506f9f3f53f957375eb71