[INFO] fetching crate flash-lso 0.5.0...
[INFO] checking flash-lso-0.5.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate flash-lso 0.5.0 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate flash-lso 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 flash-lso 0.5.0
[INFO] finished tweaking crates.io crate flash-lso 0.5.0
[INFO] tweaked toml for crates.io crate flash-lso 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]  Downloading crates ...
[INFO] [stderr]   Downloaded enumset v1.0.7
[INFO] [stderr]   Downloaded enumset_derive v0.5.5
[INFO] [stderr]   Downloaded derive-try-from-primitive v1.0.0
[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] 9286c43faa0976407cd64a23cdd548bc9dbb08901cdc42fa1c83f646e47ca6b6
[INFO] running `Command { std: "docker" "start" "-a" "9286c43faa0976407cd64a23cdd548bc9dbb08901cdc42fa1c83f646e47ca6b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9286c43faa0976407cd64a23cdd548bc9dbb08901cdc42fa1c83f646e47ca6b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9286c43faa0976407cd64a23cdd548bc9dbb08901cdc42fa1c83f646e47ca6b6", kill_on_drop: false }`
[INFO] [stdout] 9286c43faa0976407cd64a23cdd548bc9dbb08901cdc42fa1c83f646e47ca6b6
[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] 4ae936e97e741bb91c367e881dab65857d2fbe9d9c58d3b84f183bb541e24540
[INFO] running `Command { std: "docker" "start" "-a" "4ae936e97e741bb91c367e881dab65857d2fbe9d9c58d3b84f183bb541e24540", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking half v1.8.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking cookie-factory v0.3.2
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking lexical-core v0.7.6
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking rayon v1.5.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking nom v6.2.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling derive-try-from-primitive v1.0.0
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]    Compiling enumset_derive v0.5.5
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking enumset v1.0.7
[INFO] [stderr]     Checking flash-lso v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> benches/benchmarks.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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 `flash-lso` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4ae936e97e741bb91c367e881dab65857d2fbe9d9c58d3b84f183bb541e24540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ae936e97e741bb91c367e881dab65857d2fbe9d9c58d3b84f183bb541e24540", kill_on_drop: false }`
[INFO] [stdout] 4ae936e97e741bb91c367e881dab65857d2fbe9d9c58d3b84f183bb541e24540
