[INFO] cloning repository https://github.com/tonyxty/kalos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tonyxty/kalos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftonyxty%2Fkalos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftonyxty%2Fkalos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a55ed59904742c2eec8a9f451e1cf51f428c9a48
[INFO] testing tonyxty/kalos against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftonyxty%2Fkalos" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tonyxty/kalos 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/tonyxty/kalos
[INFO] finished tweaking git repo https://github.com/tonyxty/kalos
[INFO] tweaked toml for git repo https://github.com/tonyxty/kalos written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/tonyxty/kalos 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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 7f0ef62d0e26d22694c948e7401ac053354a89e61302bcefdf38035e7206ba05
[INFO] running `Command { std: "docker" "start" "-a" "7f0ef62d0e26d22694c948e7401ac053354a89e61302bcefdf38035e7206ba05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f0ef62d0e26d22694c948e7401ac053354a89e61302bcefdf38035e7206ba05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f0ef62d0e26d22694c948e7401ac053354a89e61302bcefdf38035e7206ba05", kill_on_drop: false }`
[INFO] [stdout] 7f0ef62d0e26d22694c948e7401ac053354a89e61302bcefdf38035e7206ba05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 2dde54fd8137c8433de44caa58c9a2a8cd9ee0209773b9666fb64d375293e46f
[INFO] running `Command { std: "docker" "start" "-a" "2dde54fd8137c8433de44caa58c9a2a8cd9ee0209773b9666fb64d375293e46f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling inkwell v0.1.0 (https://github.com/TheDan64/inkwell?branch=master#f768691f)
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling pest v2.1.3 (https://github.com/pest-parser/pest?branch=master#654505c9)
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/pest-25f0f91498b61172/654505c/pest/src/lib.rs:10:53
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![cfg_attr(feature = "const_prec_climber", feature(const_fn))]
[INFO] [stdout]    |                                                     ^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/pest-25f0f91498b61172/654505c/pest/src/lib.rs:10:45
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![cfg_attr(feature = "const_prec_climber", feature(const_fn))]
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pest` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2dde54fd8137c8433de44caa58c9a2a8cd9ee0209773b9666fb64d375293e46f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dde54fd8137c8433de44caa58c9a2a8cd9ee0209773b9666fb64d375293e46f", kill_on_drop: false }`
[INFO] [stdout] 2dde54fd8137c8433de44caa58c9a2a8cd9ee0209773b9666fb64d375293e46f