[INFO] fetching crate uwl 0.6.0...
[INFO] testing uwl-0.6.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate uwl 0.6.0 into /workspace/builds/worker-16/source
[INFO] validating manifest of crates.io crate uwl 0.6.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate uwl 0.6.0
[INFO] finished tweaking crates.io crate uwl 0.6.0
[INFO] tweaked toml for crates.io crate uwl 0.6.0 written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07827df0ec6403f19bc13e09de0118b3570cb033892ac1b4eeb0b7b50cc66b28
[INFO] running `Command { std: "docker" "start" "-a" "07827df0ec6403f19bc13e09de0118b3570cb033892ac1b4eeb0b7b50cc66b28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07827df0ec6403f19bc13e09de0118b3570cb033892ac1b4eeb0b7b50cc66b28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07827df0ec6403f19bc13e09de0118b3570cb033892ac1b4eeb0b7b50cc66b28", kill_on_drop: false }`
[INFO] [stdout] 07827df0ec6403f19bc13e09de0118b3570cb033892ac1b4eeb0b7b50cc66b28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 32034515e3fa2a84d29a5e0a482f62a80c62b68a5bd27873afe41444463aece4
[INFO] running `Command { std: "docker" "start" "-a" "32034515e3fa2a84d29a5e0a482f62a80c62b68a5bd27873afe41444463aece4", kill_on_drop: false }`
[INFO] [stderr]    Compiling uwl v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "32034515e3fa2a84d29a5e0a482f62a80c62b68a5bd27873afe41444463aece4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32034515e3fa2a84d29a5e0a482f62a80c62b68a5bd27873afe41444463aece4", kill_on_drop: false }`
[INFO] [stdout] 32034515e3fa2a84d29a5e0a482f62a80c62b68a5bd27873afe41444463aece4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c51db8ba1f74a7516b9d3cf69ead42c8b434e68a0cff2baa799ea582ef9145cc
[INFO] running `Command { std: "docker" "start" "-a" "c51db8ba1f74a7516b9d3cf69ead42c8b434e68a0cff2baa799ea582ef9145cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling uwl v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:90:27
[INFO] [stdout]    |
[INFO] [stdout] 90 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]    |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 `uwl` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c51db8ba1f74a7516b9d3cf69ead42c8b434e68a0cff2baa799ea582ef9145cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c51db8ba1f74a7516b9d3cf69ead42c8b434e68a0cff2baa799ea582ef9145cc", kill_on_drop: false }`
[INFO] [stdout] c51db8ba1f74a7516b9d3cf69ead42c8b434e68a0cff2baa799ea582ef9145cc