[INFO] fetching crate syntex_bitflags 0.1.0...
[INFO] testing syntex_bitflags-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate syntex_bitflags 0.1.0 into /workspace/builds/worker-43/source
[INFO] validating manifest of crates.io crate syntex_bitflags 0.1.0 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 syntex_bitflags 0.1.0
[INFO] finished tweaking crates.io crate syntex_bitflags 0.1.0
[INFO] tweaked toml for crates.io crate syntex_bitflags 0.1.0 written to /workspace/builds/worker-43/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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] 935f15316992236726b9dcd6a6f3b9d85bbad69e47b9a4a09cc9f8cd004a53a4
[INFO] running `Command { std: "docker" "start" "-a" "935f15316992236726b9dcd6a6f3b9d85bbad69e47b9a4a09cc9f8cd004a53a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "935f15316992236726b9dcd6a6f3b9d85bbad69e47b9a4a09cc9f8cd004a53a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "935f15316992236726b9dcd6a6f3b9d85bbad69e47b9a4a09cc9f8cd004a53a4", kill_on_drop: false }`
[INFO] [stdout] 935f15316992236726b9dcd6a6f3b9d85bbad69e47b9a4a09cc9f8cd004a53a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7f91db681e9e129016e399aa62e82659087834bb8ecf96d3df712a160e5f40a
[INFO] running `Command { std: "docker" "start" "-a" "a7f91db681e9e129016e399aa62e82659087834bb8ecf96d3df712a160e5f40a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syntex_bitflags v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![unstable]
[INFO] [stdout]    | ^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `staged_api` in this scope
[INFO] [stdout]   --> src/lib.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![staged_api]
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syntex_bitflags` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "a7f91db681e9e129016e399aa62e82659087834bb8ecf96d3df712a160e5f40a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7f91db681e9e129016e399aa62e82659087834bb8ecf96d3df712a160e5f40a", kill_on_drop: false }`
[INFO] [stdout] a7f91db681e9e129016e399aa62e82659087834bb8ecf96d3df712a160e5f40a