[INFO] cloning repository https://github.com/haetze/server_2_2048
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/haetze/server_2_2048" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhaetze%2Fserver_2_2048", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhaetze%2Fserver_2_2048'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3d7ce27e5b8871b45b9150cb02d0a9fdd1f92dc5
[INFO] checking haetze/server_2_2048 against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhaetze%2Fserver_2_2048" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/haetze/server_2_2048
[INFO] finished tweaking git repo https://github.com/haetze/server_2_2048
[INFO] tweaked toml for git repo https://github.com/haetze/server_2_2048 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/haetze/server_2_2048 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/haetze/server_2_2048 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/haetze/lib_2048`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-if v0.1.4
[INFO] [stderr]   Downloaded iovec v0.1.2
[INFO] [stderr]   Downloaded tokio-reactor v0.1.2
[INFO] [stderr]   Downloaded tokio-udp v0.1.1
[INFO] [stderr]   Downloaded log v0.4.3
[INFO] [stderr]   Downloaded tokio-io v0.1.7
[INFO] [stderr]   Downloaded tokio-fs v0.1.2
[INFO] [stderr]   Downloaded crossbeam-deque v0.3.1
[INFO] [stderr]   Downloaded tokio-executor v0.1.2
[INFO] [stderr]   Downloaded lazy_static v1.0.2
[INFO] [stderr]   Downloaded tokio-tcp v0.1.0
[INFO] [stderr]   Downloaded bytes v0.4.9
[INFO] [stderr]   Downloaded rand_core v0.2.1
[INFO] [stderr]   Downloaded tokio-timer v0.2.4
[INFO] [stderr]   Downloaded crossbeam-epoch v0.4.3
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.5
[INFO] [stderr]   Downloaded byteorder v1.2.4
[INFO] [stderr]   Downloaded rand v0.4.2
[INFO] [stderr]   Downloaded arrayvec v0.4.7
[INFO] [stderr]   Downloaded crossbeam-utils v0.3.2
[INFO] [stderr]   Downloaded futures v0.1.23
[INFO] [stderr]   Downloaded rand v0.5.4
[INFO] [stderr]   Downloaded mio v0.6.15
[INFO] [stderr]   Downloaded memoffset v0.2.1
[INFO] [stderr]   Downloaded tokio-codec v0.1.0
[INFO] [stderr]   Downloaded bitflags v1.0.3
[INFO] [stderr]   Downloaded lazycell v0.6.0
[INFO] [stderr]   Downloaded slab v0.4.0
[INFO] [stderr]   Downloaded tokio v0.1.7
[INFO] [stderr]   Downloaded libc v0.2.42
[INFO] [stderr]   Downloaded winapi v0.3.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c43e599da60cbb5a93e5015a8ab56291a3c08a142496bb6ccd66effec9143f9e
[INFO] running `Command { std: "docker" "start" "-a" "c43e599da60cbb5a93e5015a8ab56291a3c08a142496bb6ccd66effec9143f9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c43e599da60cbb5a93e5015a8ab56291a3c08a142496bb6ccd66effec9143f9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c43e599da60cbb5a93e5015a8ab56291a3c08a142496bb6ccd66effec9143f9e", kill_on_drop: false }`
[INFO] [stdout] c43e599da60cbb5a93e5015a8ab56291a3c08a142496bb6ccd66effec9143f9e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f17ba8231851e71962edf917f5ead9f39b50844aa8882e66ffa925c11144dd4d
[INFO] running `Command { std: "docker" "start" "-a" "f17ba8231851e71962edf917f5ead9f39b50844aa8882e66ffa925c11144dd4d", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking futures v0.1.23
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]     Checking lazy_static v1.0.2
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]     Checking bytes v0.4.9
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking tokio-executor v0.1.2
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking lib_2048 v0.1.0 (https://github.com/haetze/lib_2048?rev=83fdd8e5ab7c0f5e15588cae155e0726dc7ba5d1#83fdd8e5)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/lib_2048-5fb8ed64367a9e72/83fdd8e/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(extern_prelude)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `extern_prelude` has been stable since `1.30.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lib_2048` (lib) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f17ba8231851e71962edf917f5ead9f39b50844aa8882e66ffa925c11144dd4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f17ba8231851e71962edf917f5ead9f39b50844aa8882e66ffa925c11144dd4d", kill_on_drop: false }`
[INFO] [stdout] f17ba8231851e71962edf917f5ead9f39b50844aa8882e66ffa925c11144dd4d