[INFO] fetching crate monarch2 0.1.0-beta.1... [INFO] testing monarch2-0.1.0-beta.1 against beta-2025-09-21 for beta-1.91-3 [INFO] extracting crate monarch2 0.1.0-beta.1 into /workspace/builds/worker-6-tc2/source [INFO] started tweaking crates.io crate monarch2 0.1.0-beta.1 [INFO] finished tweaking crates.io crate monarch2 0.1.0-beta.1 [INFO] tweaked toml for crates.io crate monarch2 0.1.0-beta.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate monarch2 0.1.0-beta.1 on toolchain beta-2025-09-21 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate monarch2 0.1.0-beta.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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 7863dba7db6604790bc42c14a10ca6b854be10b8b6c3625c267a06cfa1a5c86b [INFO] running `Command { std: "docker" "start" "-a" "7863dba7db6604790bc42c14a10ca6b854be10b8b6c3625c267a06cfa1a5c86b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7863dba7db6604790bc42c14a10ca6b854be10b8b6c3625c267a06cfa1a5c86b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7863dba7db6604790bc42c14a10ca6b854be10b8b6c3625c267a06cfa1a5c86b", kill_on_drop: false }` [INFO] [stdout] 7863dba7db6604790bc42c14a10ca6b854be10b8b6c3625c267a06cfa1a5c86b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] e882956bc5a26838419bd46ca7db13b3b88dc2ae669ef28b705587e6e1e735ce [INFO] running `Command { std: "docker" "start" "-a" "e882956bc5a26838419bd46ca7db13b3b88dc2ae669ef28b705587e6e1e735ce", kill_on_drop: false }` [INFO] [stderr] Compiling syn v2.0.104 [INFO] [stderr] Compiling serde v1.0.219 [INFO] [stderr] Compiling futures-sink v0.3.31 [INFO] [stderr] Compiling futures-core v0.3.31 [INFO] [stderr] Compiling futures-task v0.3.31 [INFO] [stderr] Compiling heapless v0.8.0 [INFO] [stderr] Compiling embedded-io-async v0.6.1 [INFO] [stderr] Compiling litrs v0.4.1 [INFO] [stderr] Compiling embassy-time-driver v0.2.0 [INFO] [stderr] Compiling embedded-io v0.6.1 [INFO] [stderr] Compiling nb v1.1.0 [INFO] [stderr] Compiling embedded-hal-async v1.0.0 [INFO] [stderr] Compiling critical-section v1.2.0 [INFO] [stderr] Compiling embedded-hal v1.0.0 [INFO] [stderr] Compiling portable-atomic v1.11.1 [INFO] [stderr] Compiling nb v0.1.3 [INFO] [stderr] Compiling embassy-sync v0.6.2 [INFO] [stderr] Compiling embedded-hal v0.2.7 [INFO] [stderr] Compiling embassy-sync v0.7.0 [INFO] [stderr] Compiling memchr v2.7.5 [INFO] [stderr] Compiling futures-util v0.3.31 [INFO] [stderr] Compiling futures-channel v0.3.31 [INFO] [stderr] Compiling futures-io v0.3.31 [INFO] [stderr] Compiling minimal-lexical v0.2.1 [INFO] [stderr] Compiling embassy-futures v0.1.1 [INFO] [stderr] Compiling nom v7.1.3 [INFO] [stderr] Compiling document-features v0.2.11 [INFO] [stderr] Compiling static_cell v2.1.1 [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/static_cell-2.1.1/src/lib.rs:4:34 [INFO] [stdout] | [INFO] [stdout] 4 | #![cfg_attr(feature = "nightly", feature(type_alias_impl_trait))] // for tests [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] [stderr] error: could not compile `static_cell` (lib) due to 1 previous error [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "e882956bc5a26838419bd46ca7db13b3b88dc2ae669ef28b705587e6e1e735ce", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e882956bc5a26838419bd46ca7db13b3b88dc2ae669ef28b705587e6e1e735ce", kill_on_drop: false }` [INFO] [stdout] e882956bc5a26838419bd46ca7db13b3b88dc2ae669ef28b705587e6e1e735ce