[INFO] cloning repository https://github.com/Quentincestino/rust_limine_barebones
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Quentincestino/rust_limine_barebones" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQuentincestino%2Frust_limine_barebones", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQuentincestino%2Frust_limine_barebones'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d240239b9f8c33a39ce8efa92b73f2b6921a9712
[INFO] testing Quentincestino/rust_limine_barebones against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQuentincestino%2Frust_limine_barebones" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Quentincestino/rust_limine_barebones 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] removed /workspace/builds/worker-22/source/.cargo/config
[INFO] started tweaking git repo https://github.com/Quentincestino/rust_limine_barebones
[INFO] finished tweaking git repo https://github.com/Quentincestino/rust_limine_barebones
[INFO] tweaked toml for git repo https://github.com/Quentincestino/rust_limine_barebones written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate git repo https://github.com/Quentincestino/rust_limine_barebones 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] [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 stivale-boot v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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] 2ca12bffcaec7a47f22b4f5352803de4da4895372742da3bc7a5be835ef32003
[INFO] running `Command { std: "docker" "start" "-a" "2ca12bffcaec7a47f22b4f5352803de4da4895372742da3bc7a5be835ef32003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ca12bffcaec7a47f22b4f5352803de4da4895372742da3bc7a5be835ef32003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ca12bffcaec7a47f22b4f5352803de4da4895372742da3bc7a5be835ef32003", kill_on_drop: false }`
[INFO] [stdout] 2ca12bffcaec7a47f22b4f5352803de4da4895372742da3bc7a5be835ef32003
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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] 24a892ed3c577ef8fad9319faadbc23258cda5bad66fc701d7a7b2e4041cf808
[INFO] running `Command { std: "docker" "start" "-a" "24a892ed3c577ef8fad9319faadbc23258cda5bad66fc701d7a7b2e4041cf808", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling stivale-boot v0.2.1
[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/stivale-boot-0.2.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn_fn_ptr_basics)]
[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 `stivale-boot` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "24a892ed3c577ef8fad9319faadbc23258cda5bad66fc701d7a7b2e4041cf808", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24a892ed3c577ef8fad9319faadbc23258cda5bad66fc701d7a7b2e4041cf808", kill_on_drop: false }`
[INFO] [stdout] 24a892ed3c577ef8fad9319faadbc23258cda5bad66fc701d7a7b2e4041cf808