[INFO] fetching crate cbuf 0.1.1...
[INFO] testing cbuf-0.1.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate cbuf 0.1.1 into /workspace/builds/worker-117/source
[INFO] validating manifest of crates.io crate cbuf 0.1.1 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 crates.io crate cbuf 0.1.1
[INFO] finished tweaking crates.io crate cbuf 0.1.1
[INFO] tweaked toml for crates.io crate cbuf 0.1.1 written to /workspace/builds/worker-117/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-117/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c51906e1605a17f4f01e402e507fd7bf26b52e1ad06ad00e85f5404e47acfbe
[INFO] running `Command { std: "docker" "start" "-a" "4c51906e1605a17f4f01e402e507fd7bf26b52e1ad06ad00e85f5404e47acfbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c51906e1605a17f4f01e402e507fd7bf26b52e1ad06ad00e85f5404e47acfbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c51906e1605a17f4f01e402e507fd7bf26b52e1ad06ad00e85f5404e47acfbe", kill_on_drop: false }`
[INFO] [stdout] 4c51906e1605a17f4f01e402e507fd7bf26b52e1ad06ad00e85f5404e47acfbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-117/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 822eddf775518859269eeed4db4632beeb8805a031d29802085afc257667c64a
[INFO] running `Command { std: "docker" "start" "-a" "822eddf775518859269eeed4db4632beeb8805a031d29802085afc257667c64a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cbuf v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![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 `cbuf` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "822eddf775518859269eeed4db4632beeb8805a031d29802085afc257667c64a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "822eddf775518859269eeed4db4632beeb8805a031d29802085afc257667c64a", kill_on_drop: false }`
[INFO] [stdout] 822eddf775518859269eeed4db4632beeb8805a031d29802085afc257667c64a