[INFO] cloning repository https://github.com/udoprog/shrek
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/udoprog/shrek" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fudoprog%2Fshrek", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fudoprog%2Fshrek'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf974ea66c46ff9363cef4c20d64fe9a54a16fe9
[INFO] testing udoprog/shrek against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fudoprog%2Fshrek" "/workspace/builds/worker-92/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-92/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/udoprog/shrek 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/udoprog/shrek
[INFO] finished tweaking git repo https://github.com/udoprog/shrek
[INFO] tweaked toml for git repo https://github.com/udoprog/shrek written to /workspace/builds/worker-92/source/Cargo.toml
[INFO] crate git repo https://github.com/udoprog/shrek 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hashbrown v0.1.7
[INFO] [stderr]   Downloaded libc v0.2.45
[INFO] [stderr]   Downloaded futures-io-preview v0.3.0-alpha.10
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.10
[INFO] [stderr]   Downloaded pin-utils v0.1.0-alpha.3
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.10
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.10
[INFO] [stderr]   Downloaded futures-preview v0.3.0-alpha.10
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.10
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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] b2b6497ace14163cab5923f75f7fb7b575a53b18a59e64bc3f970ac03182a46e
[INFO] running `Command { std: "docker" "start" "-a" "b2b6497ace14163cab5923f75f7fb7b575a53b18a59e64bc3f970ac03182a46e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2b6497ace14163cab5923f75f7fb7b575a53b18a59e64bc3f970ac03182a46e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2b6497ace14163cab5923f75f7fb7b575a53b18a59e64bc3f970ac03182a46e", kill_on_drop: false }`
[INFO] [stdout] b2b6497ace14163cab5923f75f7fb7b575a53b18a59e64bc3f970ac03182a46e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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] fe8ade9c942be856959dd6970b3b40dcb1cdef5bd09d32b1540c8a6b8cbb7cbb
[INFO] running `Command { std: "docker" "start" "-a" "fe8ade9c942be856959dd6970b3b40dcb1cdef5bd09d32b1540c8a6b8cbb7cbb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.3
[INFO] [stderr]    Compiling slab v0.4.1
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling byteorder v1.2.7
[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/pin-utils-0.1.0-alpha.3/src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(pin)]
[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 `pin-utils` 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" "fe8ade9c942be856959dd6970b3b40dcb1cdef5bd09d32b1540c8a6b8cbb7cbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe8ade9c942be856959dd6970b3b40dcb1cdef5bd09d32b1540c8a6b8cbb7cbb", kill_on_drop: false }`
[INFO] [stdout] fe8ade9c942be856959dd6970b3b40dcb1cdef5bd09d32b1540c8a6b8cbb7cbb