[INFO] fetching crate cache-macro 0.4.1...
[INFO] testing cache-macro-0.4.1 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate cache-macro 0.4.1 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate cache-macro 0.4.1 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cache-macro 0.4.1
[INFO] finished tweaking crates.io crate cache-macro 0.4.1
[INFO] tweaked toml for crates.io crate cache-macro 0.4.1 written to /workspace/builds/worker-26/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1b9b4ee54da55555d8be4da98a227112e83fcc46374f1f81ef5183c817c74c3
[INFO] running `Command { std: "docker" "start" "-a" "c1b9b4ee54da55555d8be4da98a227112e83fcc46374f1f81ef5183c817c74c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1b9b4ee54da55555d8be4da98a227112e83fcc46374f1f81ef5183c817c74c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1b9b4ee54da55555d8be4da98a227112e83fcc46374f1f81ef5183c817c74c3", kill_on_drop: false }`
[INFO] [stdout] c1b9b4ee54da55555d8be4da98a227112e83fcc46374f1f81ef5183c817c74c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb0e8d0479ea06e98e49e49e6d8271ebd792746df4c44400b860b61030a8ced6
[INFO] running `Command { std: "docker" "start" "-a" "eb0e8d0479ea06e98e49e49e6d8271ebd792746df4c44400b860b61030a8ced6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling cache-macro v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:170:1
[INFO] [stdout]     |
[INFO] [stdout] 170 | #![feature(extern_crate_item_prelude)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]     |
[INFO] [stdout]     = help: the feature `extern_crate_item_prelude` has been stable since 1.31.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:171:1
[INFO] [stdout]     |
[INFO] [stdout] 171 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `proc_macro2`
[INFO] [stdout]  --> src/config.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use proc_macro2;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cache-macro` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "eb0e8d0479ea06e98e49e49e6d8271ebd792746df4c44400b860b61030a8ced6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb0e8d0479ea06e98e49e49e6d8271ebd792746df4c44400b860b61030a8ced6", kill_on_drop: false }`
[INFO] [stdout] eb0e8d0479ea06e98e49e49e6d8271ebd792746df4c44400b860b61030a8ced6