[INFO] fetching crate tokio-cache 0.2.0-alpha.1...
[INFO] checking tokio-cache-0.2.0-alpha.1 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate tokio-cache 0.2.0-alpha.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate tokio-cache 0.2.0-alpha.1 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tokio-cache 0.2.0-alpha.1
[INFO] finished tweaking crates.io crate tokio-cache 0.2.0-alpha.1
[INFO] tweaked toml for crates.io crate tokio-cache 0.2.0-alpha.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7eddffe1d4aa30d34d057bdb122c6802340ce87ede3d4cac9a2d46f3b5c9577
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d7eddffe1d4aa30d34d057bdb122c6802340ce87ede3d4cac9a2d46f3b5c9577", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7eddffe1d4aa30d34d057bdb122c6802340ce87ede3d4cac9a2d46f3b5c9577", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7eddffe1d4aa30d34d057bdb122c6802340ce87ede3d4cac9a2d46f3b5c9577", kill_on_drop: false }`
[INFO] [stdout] d7eddffe1d4aa30d34d057bdb122c6802340ce87ede3d4cac9a2d46f3b5c9577
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6d65652dc25f9838f10894d2e702c3d699ce1dc273b44771541ef481b95d810
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c6d65652dc25f9838f10894d2e702c3d699ce1dc273b44771541ef481b95d810", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling rayon v1.3.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking sized-chunks v0.3.1
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling im v13.0.0
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking rayon-core v1.7.1
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking tokio-sync v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-cache v0.2.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/criterion-0.3.3/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`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "c6d65652dc25f9838f10894d2e702c3d699ce1dc273b44771541ef481b95d810", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6d65652dc25f9838f10894d2e702c3d699ce1dc273b44771541ef481b95d810", kill_on_drop: false }`
[INFO] [stdout] c6d65652dc25f9838f10894d2e702c3d699ce1dc273b44771541ef481b95d810
