[INFO] fetching crate bank_vault 0.0.2...
[INFO] testing bank_vault-0.0.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate bank_vault 0.0.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate bank_vault 0.0.2 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 bank_vault 0.0.2
[INFO] finished tweaking crates.io crate bank_vault 0.0.2
[INFO] tweaked toml for crates.io crate bank_vault 0.0.2 written to /workspace/builds/worker-0/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] b9bef2ca606d6bb57ac56b8e87b28423ab16c56afef61249ef71247c129364e6
[INFO] running `Command { std: "docker" "start" "-a" "b9bef2ca606d6bb57ac56b8e87b28423ab16c56afef61249ef71247c129364e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9bef2ca606d6bb57ac56b8e87b28423ab16c56afef61249ef71247c129364e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9bef2ca606d6bb57ac56b8e87b28423ab16c56afef61249ef71247c129364e6", kill_on_drop: false }`
[INFO] [stdout] b9bef2ca606d6bb57ac56b8e87b28423ab16c56afef61249ef71247c129364e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 906b00b4133cf05b61221ee322175e280458c7d53f80b35de792347bdc788609
[INFO] running `Command { std: "docker" "start" "-a" "906b00b4133cf05b61221ee322175e280458c7d53f80b35de792347bdc788609", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling bank_vault v0.0.2 (/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(option_unwrap_none)]
[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 `bank_vault` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "906b00b4133cf05b61221ee322175e280458c7d53f80b35de792347bdc788609", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "906b00b4133cf05b61221ee322175e280458c7d53f80b35de792347bdc788609", kill_on_drop: false }`
[INFO] [stdout] 906b00b4133cf05b61221ee322175e280458c7d53f80b35de792347bdc788609