[INFO] fetching crate modrpc-hub 0.0.1...
[INFO] testing modrpc-hub-0.0.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate modrpc-hub 0.0.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate modrpc-hub 0.0.1
[INFO] finished tweaking crates.io crate modrpc-hub 0.0.1
[INFO] tweaked toml for crates.io crate modrpc-hub 0.0.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate modrpc-hub 0.0.1 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate modrpc-hub 0.0.1 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" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 93a6f39ea87c53f38f77910882dcaa24829c1695ce8b0c5ca1157e74f9018dbe
[INFO] running `Command { std: "docker" "start" "-a" "93a6f39ea87c53f38f77910882dcaa24829c1695ce8b0c5ca1157e74f9018dbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93a6f39ea87c53f38f77910882dcaa24829c1695ce8b0c5ca1157e74f9018dbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93a6f39ea87c53f38f77910882dcaa24829c1695ce8b0c5ca1157e74f9018dbe", kill_on_drop: false }`
[INFO] [stdout] 93a6f39ea87c53f38f77910882dcaa24829c1695ce8b0c5ca1157e74f9018dbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7b1c8ecf252e1b1493d33eadb61c1735aa2d5930f69d44eef9d49397611b964
[INFO] running `Command { std: "docker" "start" "-a" "e7b1c8ecf252e1b1493d33eadb61c1735aa2d5930f69d44eef9d49397611b964", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling cfg-if v1.0.3
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling thid v0.0.1
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling slab v0.4.11
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling waitq v0.0.3
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling mproto v0.2.1
[INFO] [stderr]    Compiling log v0.4.28
[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/mproto-0.2.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(marker_trait_attr)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling bab v0.0.4
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling async-event v0.2.1
[INFO] [stderr]    Compiling slotmap v1.0.7
[INFO] [stderr]    Compiling ispawn v0.0.2
[INFO] [stderr]    Compiling waker-fn v1.2.0
[INFO] [stderr]    Compiling modrpc-executor v0.0.1
[INFO] [stderr]    Compiling futures-lite v1.13.0
[INFO] [stderr]    Compiling hashbrown v0.15.5
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling burstq v0.2.0
[INFO] [stderr] error: could not compile `mproto` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e7b1c8ecf252e1b1493d33eadb61c1735aa2d5930f69d44eef9d49397611b964", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7b1c8ecf252e1b1493d33eadb61c1735aa2d5930f69d44eef9d49397611b964", kill_on_drop: false }`
[INFO] [stdout] e7b1c8ecf252e1b1493d33eadb61c1735aa2d5930f69d44eef9d49397611b964