[INFO] cloning repository https://github.com/K-atc/teapot-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/K-atc/teapot-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FK-atc%2Fteapot-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FK-atc%2Fteapot-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ce655b2d58ba9a5a2fee87c9fccb9e17adeacaa
[INFO] testing K-atc/teapot-rs against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FK-atc%2Fteapot-rs" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/K-atc/teapot-rs on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/K-atc/teapot-rs
[INFO] finished tweaking git repo https://github.com/K-atc/teapot-rs
[INFO] tweaked toml for git repo https://github.com/K-atc/teapot-rs written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/K-atc/teapot-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/K-atc/acid_io.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded windows_i686_gnu v0.29.0
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.29.0
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.29.0
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.29.0
[INFO] [stderr]   Downloaded windows_i686_msvc v0.29.0
[INFO] [stderr]   Downloaded windows v0.29.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e5684c7b86b098220f105c82828a07bc46a0c9e6a5c9035eed48bec72f0eba4
[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" "4e5684c7b86b098220f105c82828a07bc46a0c9e6a5c9035eed48bec72f0eba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e5684c7b86b098220f105c82828a07bc46a0c9e6a5c9035eed48bec72f0eba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e5684c7b86b098220f105c82828a07bc46a0c9e6a5c9035eed48bec72f0eba4", kill_on_drop: false }`
[INFO] [stdout] 4e5684c7b86b098220f105c82828a07bc46a0c9e6a5c9035eed48bec72f0eba4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", 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] 077ab5849d77602d9801cf63988f4e31ce21f4b5328d6d4fc7598a18b1dad71e
[INFO] running `Command { std: "docker" "start" "-a" "077ab5849d77602d9801cf63988f4e31ce21f4b5328d6d4fc7598a18b1dad71e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling acid_io v0.1.0 (https://github.com/K-atc/acid_io.git#bda7898d)
[INFO] [stderr]    Compiling teapot 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:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(binary_heap_into_iter_sorted)]
[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 `teapot` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "077ab5849d77602d9801cf63988f4e31ce21f4b5328d6d4fc7598a18b1dad71e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "077ab5849d77602d9801cf63988f4e31ce21f4b5328d6d4fc7598a18b1dad71e", kill_on_drop: false }`
[INFO] [stdout] 077ab5849d77602d9801cf63988f4e31ce21f4b5328d6d4fc7598a18b1dad71e