[INFO] cloning repository https://github.com/HUST-OS/tiaoshi-dashi-sbi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HUST-OS/tiaoshi-dashi-sbi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHUST-OS%2Ftiaoshi-dashi-sbi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHUST-OS%2Ftiaoshi-dashi-sbi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d23666c3cdad2f90bce9b0dfdd41d62901e4a1b4
[INFO] testing HUST-OS/tiaoshi-dashi-sbi against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHUST-OS%2Ftiaoshi-dashi-sbi" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HUST-OS/tiaoshi-dashi-sbi 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 git repo https://github.com/HUST-OS/tiaoshi-dashi-sbi
[INFO] finished tweaking git repo https://github.com/HUST-OS/tiaoshi-dashi-sbi
[INFO] tweaked toml for git repo https://github.com/HUST-OS/tiaoshi-dashi-sbi written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/HUST-OS/tiaoshi-dashi-sbi 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e69d1645459c0be0722c40bf97cd458ce13bd04779646d70aa953b92e960a645
[INFO] running `Command { std: "docker" "start" "-a" "e69d1645459c0be0722c40bf97cd458ce13bd04779646d70aa953b92e960a645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e69d1645459c0be0722c40bf97cd458ce13bd04779646d70aa953b92e960a645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e69d1645459c0be0722c40bf97cd458ce13bd04779646d70aa953b92e960a645", kill_on_drop: false }`
[INFO] [stdout] e69d1645459c0be0722c40bf97cd458ce13bd04779646d70aa953b92e960a645
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 9f1ba1689ac6a14dfaf51992cbb0a520617a7647c0dea03afa276d0f1be3b806
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9f1ba1689ac6a14dfaf51992cbb0a520617a7647c0dea03afa276d0f1be3b806", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling spin v0.7.1
[INFO] [stderr]    Compiling tiaoshi-dashi-qemu-sbi v0.1.0 (/opt/rustwide/workdir/qemu-sbi)
[INFO] [stderr]    Compiling test-kernel v0.1.0 (/opt/rustwide/workdir/test-kernel)
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling embedded-hal v1.0.0-alpha.4
[INFO] [stderr]    Compiling regex v1.5.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lock_api-0.4.4/src/lib.rs:91:34
[INFO] [stdout]    |
[INFO] [stdout] 91 | #![cfg_attr(feature = "nightly", feature(const_fn_trait_bound))]
[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 `lock_api` 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" "9f1ba1689ac6a14dfaf51992cbb0a520617a7647c0dea03afa276d0f1be3b806", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f1ba1689ac6a14dfaf51992cbb0a520617a7647c0dea03afa276d0f1be3b806", kill_on_drop: false }`
[INFO] [stdout] 9f1ba1689ac6a14dfaf51992cbb0a520617a7647c0dea03afa276d0f1be3b806