[INFO] cloning repository https://github.com/PyO3/tokio
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PyO3/tokio" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPyO3%2Ftokio", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPyO3%2Ftokio'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 639611517cb3a16d952cc6d0f0bc9094594de65c
[INFO] testing PyO3/tokio against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPyO3%2Ftokio" "/workspace/builds/worker-119/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-119/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PyO3/tokio on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PyO3/tokio
[INFO] finished tweaking git repo https://github.com/PyO3/tokio
[INFO] tweaked toml for git repo https://github.com/PyO3/tokio written to /workspace/builds/worker-119/source/Cargo.toml
[INFO] crate git repo https://github.com/PyO3/tokio already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded twoway v0.1.7
[INFO] [stderr]   Downloaded spin v0.4.6
[INFO] [stderr]   Downloaded tokio-signal v0.1.2
[INFO] [stderr]   Downloaded memchr v2.0.0
[INFO] [stderr]   Downloaded boxfnonce v0.0.3
[INFO] [stderr]   Downloaded chan v0.1.19
[INFO] [stderr]   Downloaded num-traits v0.2.3
[INFO] [stderr]   Downloaded pyo3cls v0.2.1
[INFO] [stderr]   Downloaded http-muncher v0.3.1
[INFO] [stderr]   Downloaded pyo3 v0.2.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c2c85fc78773e837e0881fd7d2913a6ef05596bae2330a29e10c5bfe0c710dff
[INFO] running `Command { std: "docker" "start" "-a" "c2c85fc78773e837e0881fd7d2913a6ef05596bae2330a29e10c5bfe0c710dff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2c85fc78773e837e0881fd7d2913a6ef05596bae2330a29e10c5bfe0c710dff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2c85fc78773e837e0881fd7d2913a6ef05596bae2330a29e10c5bfe0c710dff", kill_on_drop: false }`
[INFO] [stdout] c2c85fc78773e837e0881fd7d2913a6ef05596bae2330a29e10c5bfe0c710dff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 738dcc14f771f5abee4eb1b589306556ff8c1f687031357a0b956ea600f09073
[INFO] running `Command { std: "docker" "start" "-a" "738dcc14f771f5abee4eb1b589306556ff8c1f687031357a0b956ea600f09073", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.33
[INFO] [stderr]    Compiling log v0.3.8
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling byteorder v1.1.0
[INFO] [stderr]    Compiling regex-syntax v0.4.1
[INFO] [stderr]    Compiling lazycell v0.5.1
[INFO] [stderr]    Compiling slab v0.3.0
[INFO] [stderr]    Compiling futures v0.1.17
[INFO] [stderr]    Compiling scoped-tls v0.1.0
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]    Compiling slab v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.3
[INFO] [stderr]    Compiling spin v0.4.6
[INFO] [stderr]    Compiling boxfnonce v0.0.3
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.6/src/lib.rs:8:43
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
[INFO] [stdout]   |                                           ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the legacy LLVM-style asm! syntax is no longer supported
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.6/src/util.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     unsafe { asm!("pause" :::: "volatile"); }
[INFO] [stdout]   |              ----^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |              |
[INFO] [stdout]   |              help: replace with: `llvm_asm!`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider migrating to the new asm! syntax specified in RFC 2873
[INFO] [stdout]   = note: alternatively, switch to llvm_asm! to keep your code working as it is
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.6/src/lib.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "asm", feature(asm))]
[INFO] [stdout]   |                              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.6/src/lib.rs:7:42
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![cfg_attr(feature = "core_intrinsics", feature(core_intrinsics))]
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.6/src/lib.rs:8:35
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spin` due to 6 previous errors
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "738dcc14f771f5abee4eb1b589306556ff8c1f687031357a0b956ea600f09073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "738dcc14f771f5abee4eb1b589306556ff8c1f687031357a0b956ea600f09073", kill_on_drop: false }`
[INFO] [stdout] 738dcc14f771f5abee4eb1b589306556ff8c1f687031357a0b956ea600f09073