[INFO] cloning repository https://github.com/aicacia/rs-code_runner
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aicacia/rs-code_runner" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faicacia%2Frs-code_runner", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faicacia%2Frs-code_runner'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 073b0991889bd9b89a804b15d84892a60160cabf
[INFO] testing aicacia/rs-code_runner against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faicacia%2Frs-code_runner" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aicacia/rs-code_runner on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aicacia/rs-code_runner
[INFO] finished tweaking git repo https://github.com/aicacia/rs-code_runner
[INFO] tweaked toml for git repo https://github.com/aicacia/rs-code_runner written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/aicacia/rs-code_runner already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f895e880a500175b80d9ee4b0f5da34dc8d4485e576b646ab7b4225a29e78715
[INFO] running `Command { std: "docker" "start" "-a" "f895e880a500175b80d9ee4b0f5da34dc8d4485e576b646ab7b4225a29e78715", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f895e880a500175b80d9ee4b0f5da34dc8d4485e576b646ab7b4225a29e78715", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f895e880a500175b80d9ee4b0f5da34dc8d4485e576b646ab7b4225a29e78715", kill_on_drop: false }`
[INFO] [stdout] f895e880a500175b80d9ee4b0f5da34dc8d4485e576b646ab7b4225a29e78715
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b0efade494b91ce3f0e562eaf8be388fcc996a6c31c41fe548e9c13cdd31e6c
[INFO] running `Command { std: "docker" "start" "-a" "5b0efade494b91ce3f0e562eaf8be388fcc996a6c31c41fe548e9c13cdd31e6c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling futures v0.1.23
[INFO] [stderr]    Compiling crossbeam-utils v0.5.0
[INFO] [stderr]    Compiling byteorder v1.2.4
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling slab v0.4.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling ryu v0.2.5
[INFO] [stderr]    Compiling serde v1.0.75
[INFO] [stderr]    Compiling smallvec v0.6.5
[INFO] [stderr]    Compiling log v0.4.4
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.5.2
[INFO] [stderr]    Compiling lock_api v0.1.3
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling crossbeam-deque v0.6.1
[INFO] [stderr]    Compiling bytes v0.4.9
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling mio v0.6.15
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling tokio-executor v0.1.4
[INFO] [stderr]    Compiling tokio-io v0.1.8
[INFO] [stderr]    Compiling tokio-timer v0.2.6
[INFO] [stderr]    Compiling tokio-current-thread v0.1.1
[INFO] [stderr]    Compiling mio-uds v0.6.6
[INFO] [stderr]    Compiling parking_lot v0.6.3
[INFO] [stderr]    Compiling tokio-threadpool v0.1.6
[INFO] [stderr]    Compiling tempfile v3.0.3
[INFO] [stderr]    Compiling tokio-codec v0.1.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.4
[INFO] [stderr]    Compiling tokio-fs v0.1.3
[INFO] [stderr]    Compiling tokio-udp v0.1.2
[INFO] [stderr]    Compiling tokio-uds v0.2.1
[INFO] [stderr]    Compiling tokio-signal v0.2.2
[INFO] [stderr]    Compiling tokio-tcp v0.1.1
[INFO] [stderr]    Compiling tokio-process v0.2.2
[INFO] [stderr]    Compiling tokio v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.75
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling code_runner v0.1.0 (/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(try_from)]
[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 `code_runner`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5b0efade494b91ce3f0e562eaf8be388fcc996a6c31c41fe548e9c13cdd31e6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b0efade494b91ce3f0e562eaf8be388fcc996a6c31c41fe548e9c13cdd31e6c", kill_on_drop: false }`
[INFO] [stdout] 5b0efade494b91ce3f0e562eaf8be388fcc996a6c31c41fe548e9c13cdd31e6c
