[INFO] fetching crate datafu 0.0.7...
[INFO] checking datafu-0.0.7 against 1.55.0 for beta-1.56-3
[INFO] extracting crate datafu 0.0.7 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate datafu 0.0.7 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 datafu 0.0.7
[INFO] finished tweaking crates.io crate datafu 0.0.7
[INFO] tweaked toml for crates.io crate datafu 0.0.7 written to /workspace/builds/worker-54/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 proptest v0.10.1
[INFO] [stderr]   Downloaded totally-safe-transmute v0.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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] bd4bb4b71759f3fadf8b4510614d2e00f089fde3ff84165ba29c8ec0d16cb2d1
[INFO] running `Command { std: "docker" "start" "-a" "bd4bb4b71759f3fadf8b4510614d2e00f089fde3ff84165ba29c8ec0d16cb2d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd4bb4b71759f3fadf8b4510614d2e00f089fde3ff84165ba29c8ec0d16cb2d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd4bb4b71759f3fadf8b4510614d2e00f089fde3ff84165ba29c8ec0d16cb2d1", kill_on_drop: false }`
[INFO] [stdout] bd4bb4b71759f3fadf8b4510614d2e00f089fde3ff84165ba29c8ec0d16cb2d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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] bd34fcaf8c4c2177d833ae51c3bbac91efeaaa7446c46368a3843871ef7c3ab9
[INFO] running `Command { std: "docker" "start" "-a" "bd34fcaf8c4c2177d833ae51c3bbac91efeaaa7446c46368a3843871ef7c3ab9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking totally-safe-transmute v0.0.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking proptest v0.10.1
[INFO] [stderr]     Checking datafu v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:19:38
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(not(feature = "stable"), feature(label_break_value))]
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `datafu` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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" "bd34fcaf8c4c2177d833ae51c3bbac91efeaaa7446c46368a3843871ef7c3ab9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd34fcaf8c4c2177d833ae51c3bbac91efeaaa7446c46368a3843871ef7c3ab9", kill_on_drop: false }`
[INFO] [stdout] bd34fcaf8c4c2177d833ae51c3bbac91efeaaa7446c46368a3843871ef7c3ab9
