[INFO] fetching crate async-trait-ext 0.2.1...
[INFO] testing async-trait-ext-0.2.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate async-trait-ext 0.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate async-trait-ext 0.2.1 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/rust-toolchain
[INFO] started tweaking crates.io crate async-trait-ext 0.2.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate async-trait-ext 0.2.1
[INFO] tweaked toml for crates.io crate async-trait-ext 0.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9c4c49ef7a8f666e533ebcbf91f5fe7f80e29b94cae997e2fa87c00fb40ce108
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9c4c49ef7a8f666e533ebcbf91f5fe7f80e29b94cae997e2fa87c00fb40ce108", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c4c49ef7a8f666e533ebcbf91f5fe7f80e29b94cae997e2fa87c00fb40ce108", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c4c49ef7a8f666e533ebcbf91f5fe7f80e29b94cae997e2fa87c00fb40ce108", kill_on_drop: false }`
[INFO] [stdout] 9c4c49ef7a8f666e533ebcbf91f5fe7f80e29b94cae997e2fa87c00fb40ce108
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d5f7f79e5f1f197b8c22d8a0b2425678d927b24f3f2834a33014db7e7059bff
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4d5f7f79e5f1f197b8c22d8a0b2425678d927b24f3f2834a33014db7e7059bff", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling macro-compose v0.1.0
[INFO] [stderr]    Compiling macro-input-core v0.1.0
[INFO] [stderr]    Compiling macro-input-macros v0.1.0
[INFO] [stderr]    Compiling macro-input v0.1.0
[INFO] [stderr]    Compiling async-trait-ext v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.64s
[INFO] running `Command { std: "docker" "inspect" "4d5f7f79e5f1f197b8c22d8a0b2425678d927b24f3f2834a33014db7e7059bff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d5f7f79e5f1f197b8c22d8a0b2425678d927b24f3f2834a33014db7e7059bff", kill_on_drop: false }`
[INFO] [stdout] 4d5f7f79e5f1f197b8c22d8a0b2425678d927b24f3f2834a33014db7e7059bff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 93a405e39d85f12edaf32f3e9b9342df7bed667b8781208e9931b31b82525ba5
[INFO] running `Command { std: "docker" "start" "-a" "93a405e39d85f12edaf32f3e9b9342df7bed667b8781208e9931b31b82525ba5", kill_on_drop: false }`
[INFO] [stderr]    Compiling async-trait-ext v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/mut_pattern.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_impl_trait)]
[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 `async-trait-ext` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/examples.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_impl_trait)]
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "93a405e39d85f12edaf32f3e9b9342df7bed667b8781208e9931b31b82525ba5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93a405e39d85f12edaf32f3e9b9342df7bed667b8781208e9931b31b82525ba5", kill_on_drop: false }`
[INFO] [stdout] 93a405e39d85f12edaf32f3e9b9342df7bed667b8781208e9931b31b82525ba5