[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 beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbluemont%2Frs-uttt" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bluemont/rs-uttt on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", 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-0/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" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linked-hash-map v0.2.1
[INFO] [stderr]   Downloaded md5 v0.2.1
[INFO] [stderr]   Downloaded postgres-protocol v0.1.1
[INFO] [stderr]   Downloaded fallible-iterator v0.1.3
[INFO] [stderr]   Downloaded quickcheck v0.3.2
[INFO] [stderr]   Downloaded lru-cache v0.1.0
[INFO] [stderr]   Downloaded postgres v0.13.3
[INFO] [stderr]   Downloaded bufstream v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1421e29eddd1fc3183d4a463d8b52b90bb2c5a52e25d86e717a530b09d05f076
[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" "1421e29eddd1fc3183d4a463d8b52b90bb2c5a52e25d86e717a530b09d05f076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1421e29eddd1fc3183d4a463d8b52b90bb2c5a52e25d86e717a530b09d05f076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1421e29eddd1fc3183d4a463d8b52b90bb2c5a52e25d86e717a530b09d05f076", kill_on_drop: false }`
[INFO] [stdout] 1421e29eddd1fc3183d4a463d8b52b90bb2c5a52e25d86e717a530b09d05f076
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] ce86a2a31c94389262454ee0cb90d8b5150181be2375770542d1f3f84bf941bd
[INFO] running `Command { std: "docker" "start" "-a" "ce86a2a31c94389262454ee0cb90d8b5150181be2375770542d1f3f84bf941bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling fallible-iterator v0.1.3
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling md5 v0.2.1
[INFO] [stderr]    Compiling phf_shared v0.7.20
[INFO] [stderr]    Compiling linked-hash-map v0.2.1
[INFO] [stderr]    Compiling libc v0.2.18
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling bufstream v0.1.2
[INFO] [stderr]    Compiling lru-cache v0.1.0
[INFO] [stderr]    Compiling phf v0.7.20
[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 beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] running `Command { std: "docker" "inspect" "ce86a2a31c94389262454ee0cb90d8b5150181be2375770542d1f3f84bf941bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce86a2a31c94389262454ee0cb90d8b5150181be2375770542d1f3f84bf941bd", kill_on_drop: false }`
[INFO] [stdout] ce86a2a31c94389262454ee0cb90d8b5150181be2375770542d1f3f84bf941bd