[INFO] fetching crate unmp-link-udp 0.7.0...
[INFO] testing unmp-link-udp-0.7.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate unmp-link-udp 0.7.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate unmp-link-udp 0.7.0
[INFO] finished tweaking crates.io crate unmp-link-udp 0.7.0
[INFO] tweaked toml for crates.io crate unmp-link-udp 0.7.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unmp-link-udp 0.7.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 113 packages to latest compatible versions
[INFO] [stderr]       Adding eds v0.4.4 (available: v0.5.1)
[INFO] [stderr]       Adding spin v0.9.8 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90143f38d524b6370233ef5d4bd50f56e008ca2dcc2a8063030c76ba7ba4a379
[INFO] running `Command { std: "docker" "start" "-a" "90143f38d524b6370233ef5d4bd50f56e008ca2dcc2a8063030c76ba7ba4a379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90143f38d524b6370233ef5d4bd50f56e008ca2dcc2a8063030c76ba7ba4a379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90143f38d524b6370233ef5d4bd50f56e008ca2dcc2a8063030c76ba7ba4a379", kill_on_drop: false }`
[INFO] [stdout] 90143f38d524b6370233ef5d4bd50f56e008ca2dcc2a8063030c76ba7ba4a379
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0d4caec321cb4a6a72876460e49fbbf2fd2d5d7b2b4919fb7ef1b9a43f2e081
[INFO] running `Command { std: "docker" "start" "-a" "e0d4caec321cb4a6a72876460e49fbbf2fd2d5d7b2b4919fb7ef1b9a43f2e081", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling bitflags v2.11.1
[INFO] [stderr]    Compiling linux-raw-sys v0.12.1
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling async-io v2.6.0
[INFO] [stderr]    Compiling atomic v0.5.3
[INFO] [stderr]    Compiling event-listener v5.4.1
[INFO] [stderr]    Compiling spin_loop v0.1.1
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling crc16 v0.4.0
[INFO] [stderr]    Compiling ach-util v0.1.17
[INFO] [stderr]    Compiling value-bag v1.12.0
[INFO] [stderr]    Compiling piper v0.2.5
[INFO] [stderr]    Compiling ach-ring v0.1.10
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling event-listener-strategy v0.5.4
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling fixed-queue v0.3.11
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling async-channel v2.5.0
[INFO] [stderr]    Compiling async-lock v3.4.2
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling ach-mpmc v0.2.1
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling futures-intrusive v0.4.2
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling unmp-id v2.0.0
[INFO] [stderr]    Compiling blocking v1.6.2
[INFO] [stderr]    Compiling async-executor v1.14.0
[INFO] [stderr]    Compiling unmp-link v0.7.0
[INFO] [stderr]    Compiling eds v0.4.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/unmp-link-0.7.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(const_btree_new)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/eds-0.4.4/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(const_panic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `const_panic` has been stable since `1.57.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `eds` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e0d4caec321cb4a6a72876460e49fbbf2fd2d5d7b2b4919fb7ef1b9a43f2e081", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0d4caec321cb4a6a72876460e49fbbf2fd2d5d7b2b4919fb7ef1b9a43f2e081", kill_on_drop: false }`
[INFO] [stdout] e0d4caec321cb4a6a72876460e49fbbf2fd2d5d7b2b4919fb7ef1b9a43f2e081
