[INFO] fetching crate tengwar 0.7.1...
[INFO] checking tengwar-0.7.1 against 1.55.0 for beta-1.56-3
[INFO] extracting crate tengwar 0.7.1 into /workspace/builds/worker-48/source
[INFO] validating manifest of crates.io crate tengwar 0.7.1 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 tengwar 0.7.1
[INFO] finished tweaking crates.io crate tengwar 0.7.1
[INFO] tweaked toml for crates.io crate tengwar 0.7.1 written to /workspace/builds/worker-48/source/Cargo.toml
[INFO] crate crates.io crate tengwar 0.7.1 already has a lockfile, it will not be regenerated
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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] e144298850f639d3a4d6386e78852e2763cd559c7ddc4f49dcf69c27f43a6dac
[INFO] running `Command { std: "docker" "start" "-a" "e144298850f639d3a4d6386e78852e2763cd559c7ddc4f49dcf69c27f43a6dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e144298850f639d3a4d6386e78852e2763cd559c7ddc4f49dcf69c27f43a6dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e144298850f639d3a4d6386e78852e2763cd559c7ddc4f49dcf69c27f43a6dac", kill_on_drop: false }`
[INFO] [stdout] e144298850f639d3a4d6386e78852e2763cd559c7ddc4f49dcf69c27f43a6dac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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] b1c1e492027d8f9a39f64b879e10b4e9cc7d539e1952ff88e137a9c938b76e16
[INFO] running `Command { std: "docker" "start" "-a" "b1c1e492027d8f9a39f64b879e10b4e9cc7d539e1952ff88e137a9c938b76e16", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling argh_shared v0.1.4
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling argh_derive v0.1.4
[INFO] [stderr]     Checking argh v0.1.4
[INFO] [stderr]     Checking tengwar v0.7.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> benches/benchmark.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 `tengwar` 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" "b1c1e492027d8f9a39f64b879e10b4e9cc7d539e1952ff88e137a9c938b76e16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1c1e492027d8f9a39f64b879e10b4e9cc7d539e1952ff88e137a9c938b76e16", kill_on_drop: false }`
[INFO] [stdout] b1c1e492027d8f9a39f64b879e10b4e9cc7d539e1952ff88e137a9c938b76e16
