[INFO] fetching crate async-oneshot 0.5.0...
[INFO] checking async-oneshot-0.5.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate async-oneshot 0.5.0 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate async-oneshot 0.5.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-oneshot 0.5.0
[INFO] finished tweaking crates.io crate async-oneshot 0.5.0
[INFO] tweaked toml for crates.io crate async-oneshot 0.5.0 written to /workspace/builds/worker-72/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "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 futures-micro v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9c3c1ed96acf1eb076bcc11d756e48aa479d55c164b9f8d12863bad3259ba094
[INFO] running `Command { std: "docker" "start" "-a" "9c3c1ed96acf1eb076bcc11d756e48aa479d55c164b9f8d12863bad3259ba094", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c3c1ed96acf1eb076bcc11d756e48aa479d55c164b9f8d12863bad3259ba094", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c3c1ed96acf1eb076bcc11d756e48aa479d55c164b9f8d12863bad3259ba094", kill_on_drop: false }`
[INFO] [stdout] 9c3c1ed96acf1eb076bcc11d756e48aa479d55c164b9f8d12863bad3259ba094
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 706028d46fa0e1b7896ed49d5d70e7cb7a30e89d5fb8272509aeac78635e5d97
[INFO] running `Command { std: "docker" "start" "-a" "706028d46fa0e1b7896ed49d5d70e7cb7a30e89d5fb8272509aeac78635e5d97", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking half v1.8.0
[INFO] [stderr]     Checking fastrand v1.5.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking futures-io v0.3.17
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking futures-micro v0.5.0
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking async-oneshot v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking criterion v0.3.5
[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/criterion-0.3.5/src/lib.rs:20:40
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![cfg_attr(feature = "real_blackbox", feature(test))]
[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 `criterion` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "706028d46fa0e1b7896ed49d5d70e7cb7a30e89d5fb8272509aeac78635e5d97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "706028d46fa0e1b7896ed49d5d70e7cb7a30e89d5fb8272509aeac78635e5d97", kill_on_drop: false }`
[INFO] [stdout] 706028d46fa0e1b7896ed49d5d70e7cb7a30e89d5fb8272509aeac78635e5d97
