[INFO] fetching crate standalone-proc-macro2 0.2.2...
[INFO] testing standalone-proc-macro2-0.2.2 against 1.60.0 for beta-1.61-1
[INFO] extracting crate standalone-proc-macro2 0.2.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate standalone-proc-macro2 0.2.2 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 standalone-proc-macro2 0.2.2
[INFO] finished tweaking crates.io crate standalone-proc-macro2 0.2.2
[INFO] tweaked toml for crates.io crate standalone-proc-macro2 0.2.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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 rustc-ap-syntax_pos v40.0.0
[INFO] [stderr]   Downloaded owning_ref v0.3.3
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v40.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v40.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_cratesio_shim v40.0.0
[INFO] [stderr]   Downloaded rustc-ap-serialize v40.0.0
[INFO] [stderr]   Downloaded rustc-ap-syntax v40.0.0
[INFO] [stderr]   Downloaded parking_lot_core v0.2.14
[INFO] [stderr]   Downloaded rustc-ap-proc_macro v40.0.0
[INFO] [stderr]   Downloaded parking_lot v0.5.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 9e62fff17c818588143eb56b0fb46918e1e91ca9c5b360c22be51aeee2027069
[INFO] running `Command { std: "docker" "start" "-a" "9e62fff17c818588143eb56b0fb46918e1e91ca9c5b360c22be51aeee2027069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e62fff17c818588143eb56b0fb46918e1e91ca9c5b360c22be51aeee2027069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e62fff17c818588143eb56b0fb46918e1e91ca9c5b360c22be51aeee2027069", kill_on_drop: false }`
[INFO] [stdout] 9e62fff17c818588143eb56b0fb46918e1e91ca9c5b360c22be51aeee2027069
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] e3fd183b63c0c7ef5b95fdd7b1a6f5f170cf744b3ff96e8040d88c45e766c5e8
[INFO] running `Command { std: "docker" "start" "-a" "e3fd183b63c0c7ef5b95fdd7b1a6f5f170cf744b3ff96e8040d88c45e766c5e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustc-ap-serialize v40.0.0
[INFO] [stderr]    Compiling rustc-ap-syntax v40.0.0
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling rustc-ap-rustc_cratesio_shim v40.0.0
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-40.0.0/lib.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(rustc_private, box_syntax)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-40.0.0/lib.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | #![feature(core_intrinsics)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-40.0.0/lib.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | #![feature(i128_type)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `i128_type` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-40.0.0/lib.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/parking_lot_core-0.2.14/src/lib.rs:41:68
[INFO] [stdout]    |
[INFO] [stdout] 41 | #![cfg_attr(all(feature = "nightly", target_os = "linux"), feature(integer_atomics))]
[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 `parking_lot_core` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e3fd183b63c0c7ef5b95fdd7b1a6f5f170cf744b3ff96e8040d88c45e766c5e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3fd183b63c0c7ef5b95fdd7b1a6f5f170cf744b3ff96e8040d88c45e766c5e8", kill_on_drop: false }`
[INFO] [stdout] e3fd183b63c0c7ef5b95fdd7b1a6f5f170cf744b3ff96e8040d88c45e766c5e8