[INFO] fetching crate respawn 0.1.2...
[INFO] testing respawn-0.1.2 against 1.91.0 for beta-1.92-2
[INFO] extracting crate respawn 0.1.2 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate respawn 0.1.2
[INFO] finished tweaking crates.io crate respawn 0.1.2
[INFO] tweaked toml for crates.io crate respawn 0.1.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate respawn 0.1.2 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate respawn 0.1.2 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quake-util v0.1.1
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 809b7b6af158737d2b521bba1a9bcec5b67b9f60f8a9c2d2c58cca214cfd2b55
[INFO] running `Command { std: "docker" "start" "-a" "809b7b6af158737d2b521bba1a9bcec5b67b9f60f8a9c2d2c58cca214cfd2b55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "809b7b6af158737d2b521bba1a9bcec5b67b9f60f8a9c2d2c58cca214cfd2b55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "809b7b6af158737d2b521bba1a9bcec5b67b9f60f8a9c2d2c58cca214cfd2b55", kill_on_drop: false }`
[INFO] [stdout] 809b7b6af158737d2b521bba1a9bcec5b67b9f60f8a9c2d2c58cca214cfd2b55
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 959f5ba7ab44d4651532a2a7c6c114a5e51e7be8f5929ddbc18ac0d666254a2c
[INFO] running `Command { std: "docker" "start" "-a" "959f5ba7ab44d4651532a2a7c6c114a5e51e7be8f5929ddbc18ac0d666254a2c", kill_on_drop: false }`
[INFO] [stderr]    Compiling quake-util v0.1.1
[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-1949cf8c6b5b557f/quake-util-0.1.1/src/lib.rs:2:30
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(feature = "std", feature(io_error_other))]
[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 `quake-util` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "959f5ba7ab44d4651532a2a7c6c114a5e51e7be8f5929ddbc18ac0d666254a2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "959f5ba7ab44d4651532a2a7c6c114a5e51e7be8f5929ddbc18ac0d666254a2c", kill_on_drop: false }`
[INFO] [stdout] 959f5ba7ab44d4651532a2a7c6c114a5e51e7be8f5929ddbc18ac0d666254a2c