[INFO] cloning repository https://github.com/bluemont/rs-uttt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bluemont/rs-uttt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbluemont%2Frs-uttt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbluemont%2Frs-uttt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] abe32eba01f7de9ba4143a1177e69ff4e153dc54
[INFO] testing bluemont/rs-uttt against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbluemont%2Frs-uttt" "/workspace/builds/worker-107/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-107/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bluemont/rs-uttt on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bluemont/rs-uttt
[INFO] finished tweaking git repo https://github.com/bluemont/rs-uttt
[INFO] tweaked toml for git repo https://github.com/bluemont/rs-uttt written to /workspace/builds/worker-107/source/Cargo.toml
[INFO] crate git repo https://github.com/bluemont/rs-uttt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33bfde2dbef43dbb9fe9a9b8495219aa4fefba5f35f9bc88e1c7c38b71ad8a1f
[INFO] running `Command { std: "docker" "start" "-a" "33bfde2dbef43dbb9fe9a9b8495219aa4fefba5f35f9bc88e1c7c38b71ad8a1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33bfde2dbef43dbb9fe9a9b8495219aa4fefba5f35f9bc88e1c7c38b71ad8a1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33bfde2dbef43dbb9fe9a9b8495219aa4fefba5f35f9bc88e1c7c38b71ad8a1f", kill_on_drop: false }`
[INFO] [stdout] 33bfde2dbef43dbb9fe9a9b8495219aa4fefba5f35f9bc88e1c7c38b71ad8a1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd8a57c87e96479654a8c994469db0e555dfc3dd08661a1382fdfcc3c957851a
[INFO] running `Command { std: "docker" "start" "-a" "cd8a57c87e96479654a8c994469db0e555dfc3dd08661a1382fdfcc3c957851a", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling phf_shared v0.7.20
[INFO] [stderr]    Compiling md5 v0.2.1
[INFO] [stderr]    Compiling hex v0.2.0
[INFO] [stderr]    Compiling fallible-iterator v0.1.3
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling libc v0.2.18
[INFO] [stderr]    Compiling bufstream v0.1.2
[INFO] [stderr]    Compiling linked-hash-map v0.2.1
[INFO] [stderr]    Compiling phf v0.7.20
[INFO] [stderr]    Compiling lru-cache v0.1.0
[INFO] [stderr]    Compiling postgres-protocol v0.1.1
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling postgres v0.13.3
[INFO] [stderr]    Compiling uttt 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/runners.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         'outer: loop {
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `uttt`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "cd8a57c87e96479654a8c994469db0e555dfc3dd08661a1382fdfcc3c957851a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd8a57c87e96479654a8c994469db0e555dfc3dd08661a1382fdfcc3c957851a", kill_on_drop: false }`
[INFO] [stdout] cd8a57c87e96479654a8c994469db0e555dfc3dd08661a1382fdfcc3c957851a
