[INFO] fetching crate sensitive 0.9.1...
[INFO] testing sensitive-0.9.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate sensitive 0.9.1 into /workspace/builds/worker-65/source
[INFO] validating manifest of crates.io crate sensitive 0.9.1 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 sensitive 0.9.1
[INFO] finished tweaking crates.io crate sensitive 0.9.1
[INFO] tweaked toml for crates.io crate sensitive 0.9.1 written to /workspace/builds/worker-65/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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bulletproof v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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] c4a218305f20cf3aebf2b660f447cca4f776e0e02ad688fd080bab7017f7cedc
[INFO] running `Command { std: "docker" "start" "-a" "c4a218305f20cf3aebf2b660f447cca4f776e0e02ad688fd080bab7017f7cedc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4a218305f20cf3aebf2b660f447cca4f776e0e02ad688fd080bab7017f7cedc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4a218305f20cf3aebf2b660f447cca4f776e0e02ad688fd080bab7017f7cedc", kill_on_drop: false }`
[INFO] [stdout] c4a218305f20cf3aebf2b660f447cca4f776e0e02ad688fd080bab7017f7cedc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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] bc694d040382c3430aec567752bf6e3fb5b4b24e5eccfd20cb90f38f54c0f3db
[INFO] running `Command { std: "docker" "start" "-a" "bc694d040382c3430aec567752bf6e3fb5b4b24e5eccfd20cb90f38f54c0f3db", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling tinyvec v1.3.1
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling sensitive v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / #![feature(
[INFO] [stdout] 2  | |     allocator_api,
[INFO] [stdout] 3  | |     available_concurrency,
[INFO] [stdout] 4  | |     cell_update,
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | |     vec_spare_capacity,
[INFO] [stdout] 13 | | )]
[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 `sensitive` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "bc694d040382c3430aec567752bf6e3fb5b4b24e5eccfd20cb90f38f54c0f3db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc694d040382c3430aec567752bf6e3fb5b4b24e5eccfd20cb90f38f54c0f3db", kill_on_drop: false }`
[INFO] [stdout] bc694d040382c3430aec567752bf6e3fb5b4b24e5eccfd20cb90f38f54c0f3db