[INFO] fetching crate unflappable 0.1.0...
[INFO] testing unflappable-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate unflappable 0.1.0 into /workspace/builds/worker-90/source
[INFO] validating manifest of crates.io crate unflappable 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unflappable 0.1.0
[INFO] finished tweaking crates.io crate unflappable 0.1.0
[INFO] tweaked toml for crates.io crate unflappable 0.1.0 written to /workspace/builds/worker-90/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96a9f8d2d1ed53efd98a264759d6b1000f5f9b127412a5f19755457845a94d3b
[INFO] running `Command { std: "docker" "start" "-a" "96a9f8d2d1ed53efd98a264759d6b1000f5f9b127412a5f19755457845a94d3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96a9f8d2d1ed53efd98a264759d6b1000f5f9b127412a5f19755457845a94d3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96a9f8d2d1ed53efd98a264759d6b1000f5f9b127412a5f19755457845a94d3b", kill_on_drop: false }`
[INFO] [stdout] 96a9f8d2d1ed53efd98a264759d6b1000f5f9b127412a5f19755457845a94d3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f6ffc6c0cd4d0338fd3ab7fe6b9181df272152e1c24c8f799fafe587aabd095
[INFO] running `Command { std: "docker" "start" "-a" "9f6ffc6c0cd4d0338fd3ab7fe6b9181df272152e1c24c8f799fafe587aabd095", kill_on_drop: false }`
[INFO] [stderr]    Compiling nb v1.0.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling unflappable v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> src/lib.rs:139:12
[INFO] [stdout]     |
[INFO] [stdout] 139 | #![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: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unflappable` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9f6ffc6c0cd4d0338fd3ab7fe6b9181df272152e1c24c8f799fafe587aabd095", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f6ffc6c0cd4d0338fd3ab7fe6b9181df272152e1c24c8f799fafe587aabd095", kill_on_drop: false }`
[INFO] [stdout] 9f6ffc6c0cd4d0338fd3ab7fe6b9181df272152e1c24c8f799fafe587aabd095