[INFO] cloning repository https://github.com/Lincyaw/os_exp_lab0to6
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Lincyaw/os_exp_lab0to6" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLincyaw%2Fos_exp_lab0to6", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLincyaw%2Fos_exp_lab0to6'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 54e6ee0be5c5fe7e9c71ae0b14c4ed57ad895ed0
[INFO] testing Lincyaw/os_exp_lab0to6 against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLincyaw%2Fos_exp_lab0to6" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  26% (325/1220)   
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Checking out files: 100% (1220/1220), done.
[INFO] validating manifest of git repo https://github.com/Lincyaw/os_exp_lab0to6 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/.cargo/config
[INFO] started tweaking git repo https://github.com/Lincyaw/os_exp_lab0to6
[INFO] finished tweaking git repo https://github.com/Lincyaw/os_exp_lab0to6
[INFO] tweaked toml for git repo https://github.com/Lincyaw/os_exp_lab0to6 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Lincyaw/os_exp_lab0to6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--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-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "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] 73660535a391afb43db38c2d4fd5cf7cc80292dbb0677b7e7e8b785463f19baa
[INFO] running `Command { std: "docker" "start" "-a" "73660535a391afb43db38c2d4fd5cf7cc80292dbb0677b7e7e8b785463f19baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73660535a391afb43db38c2d4fd5cf7cc80292dbb0677b7e7e8b785463f19baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73660535a391afb43db38c2d4fd5cf7cc80292dbb0677b7e7e8b785463f19baa", kill_on_drop: false }`
[INFO] [stdout] 73660535a391afb43db38c2d4fd5cf7cc80292dbb0677b7e7e8b785463f19baa
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 156412b58340118c4f57ab876b51f5a7971d0b80c162301590e30f5898fe57a7
[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" "156412b58340118c4f57ab876b51f5a7971d0b80c162301590e30f5898fe57a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling radium v0.3.0
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling static_assertions v0.3.4
[INFO] [stderr]    Compiling zero v0.1.2
[INFO] [stderr]    Compiling volatile v0.2.6
[INFO] [stderr]    Compiling bit_field v0.10.0
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling device_tree v1.0.3 (https://github.com/rcore-os/device_tree-rs#2fa8411c)
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/device_tree-rs-7c65dd35cede3b4e/2fa8411/src/lib.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | #![feature(alloc)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling thread_local v1.0.1
[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 `device_tree`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "156412b58340118c4f57ab876b51f5a7971d0b80c162301590e30f5898fe57a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "156412b58340118c4f57ab876b51f5a7971d0b80c162301590e30f5898fe57a7", kill_on_drop: false }`
[INFO] [stdout] 156412b58340118c4f57ab876b51f5a7971d0b80c162301590e30f5898fe57a7
