[INFO] fetching crate unmp-link-websocket 0.7.1...
[INFO] testing unmp-link-websocket-0.7.1 against 1.76.0 for beta-1.77-1
[INFO] extracting crate unmp-link-websocket 0.7.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate unmp-link-websocket 0.7.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unmp-link-websocket 0.7.1
[INFO] finished tweaking crates.io crate unmp-link-websocket 0.7.1
[INFO] tweaked toml for crates.io crate unmp-link-websocket 0.7.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ach-ring v0.1.9
[INFO] [stderr]   Downloaded xtensa-lx v0.8.0
[INFO] [stderr]   Downloaded interrupt v0.1.3
[INFO] [stderr]   Downloaded riscv v0.11.0
[INFO] [stderr]   Downloaded unmp-id v2.0.0
[INFO] [stderr]   Downloaded ach-mpmc v0.2.0
[INFO] [stderr]   Downloaded async-tungstenite v0.13.1
[INFO] [stderr]   Downloaded task-stream v0.3.7
[INFO] [stderr]   Downloaded embedded-hal v1.0.0
[INFO] [stderr]   Downloaded spin_loop v0.1.1
[INFO] [stderr]   Downloaded unmp v0.7.3
[INFO] [stderr]   Downloaded mutex-trait v0.2.0
[INFO] [stderr]   Downloaded ach-util v0.1.16
[INFO] [stderr]   Downloaded unmp-link v0.7.0
[INFO] [stderr]   Downloaded fixed-queue v0.3.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48b29c05f3ffda7bbdf88061c4e64ccf2b92fa26d0bb742b1928053d730a88a9
[INFO] running `Command { std: "docker" "start" "-a" "48b29c05f3ffda7bbdf88061c4e64ccf2b92fa26d0bb742b1928053d730a88a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48b29c05f3ffda7bbdf88061c4e64ccf2b92fa26d0bb742b1928053d730a88a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48b29c05f3ffda7bbdf88061c4e64ccf2b92fa26d0bb742b1928053d730a88a9", kill_on_drop: false }`
[INFO] [stdout] 48b29c05f3ffda7bbdf88061c4e64ccf2b92fa26d0bb742b1928053d730a88a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 598c1aed0247f3e8c398b987ec45b9e995624a45bdabfa008255d04cd4b422d9
[INFO] running `Command { std: "docker" "start" "-a" "598c1aed0247f3e8c398b987ec45b9e995624a45bdabfa008255d04cd4b422d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling futures-io v0.3.30
[INFO] [stderr]    Compiling value-bag v1.7.0
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling rustix v0.38.31
[INFO] [stderr]    Compiling linux-raw-sys v0.4.13
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling async-task v4.7.0
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling event-listener v2.5.3
[INFO] [stderr]    Compiling concurrent-queue v2.4.0
[INFO] [stderr]    Compiling rustix v0.37.27
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]    Compiling futures-lite v2.2.0
[INFO] [stderr]    Compiling spin_loop v0.1.1
[INFO] [stderr]    Compiling atomic-waker v1.1.2
[INFO] [stderr]    Compiling linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling event-listener v4.0.3
[INFO] [stderr]    Compiling event-listener v5.0.0
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling atomic v0.5.3
[INFO] [stderr]    Compiling futures-lite v1.13.0
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling piper v0.2.1
[INFO] [stderr]    Compiling async-lock v2.8.0
[INFO] [stderr]    Compiling event-listener-strategy v0.4.0
[INFO] [stderr]    Compiling ach-util v0.1.16
[INFO] [stderr]    Compiling event-listener-strategy v0.5.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling futures-sink v0.3.30
[INFO] [stderr]    Compiling async-lock v3.3.0
[INFO] [stderr]    Compiling ach-ring v0.1.9
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling event-listener v3.1.0
[INFO] [stderr]    Compiling async-channel v2.2.0
[INFO] [stderr]    Compiling cpufeatures v0.2.12
[INFO] [stderr]    Compiling crc16 v0.4.0
[INFO] [stderr]    Compiling ach-mpmc v0.2.0
[INFO] [stderr]    Compiling input_buffer v0.4.0
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling futures-intrusive v0.4.2
[INFO] [stderr]    Compiling async-channel v1.9.0
[INFO] [stderr]    Compiling utf-8 v0.7.6
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling fixed-queue v0.3.11
[INFO] [stderr]    Compiling unmp-id v2.0.0
[INFO] [stderr]    Compiling blocking v1.5.1
[INFO] [stderr]    Compiling async-executor v1.8.0
[INFO] [stderr]    Compiling unmp-link v0.7.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/unmp-link-0.7.0/src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(const_btree_new)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 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 `unmp-link` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "598c1aed0247f3e8c398b987ec45b9e995624a45bdabfa008255d04cd4b422d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "598c1aed0247f3e8c398b987ec45b9e995624a45bdabfa008255d04cd4b422d9", kill_on_drop: false }`
[INFO] [stdout] 598c1aed0247f3e8c398b987ec45b9e995624a45bdabfa008255d04cd4b422d9
