[INFO] fetching crate oasis-std 0.4.1...
[INFO] testing oasis-std-0.4.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate oasis-std 0.4.1 into /workspace/builds/worker-107/source
[INFO] validating manifest of crates.io crate oasis-std 0.4.1 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 crates.io crate oasis-std 0.4.1
[INFO] finished tweaking crates.io crate oasis-std 0.4.1
[INFO] tweaked toml for crates.io crate oasis-std 0.4.1 written to /workspace/builds/worker-107/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "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 oasis-client v0.1.1
[INFO] [stderr]   Downloaded wasi v0.7.0
[INFO] [stderr]   Downloaded oasis-test v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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] 994a438dd9e43263d0e2ee35466cfde23f515012e0d1a37d2b498a4cdefea24e
[INFO] running `Command { std: "docker" "start" "-a" "994a438dd9e43263d0e2ee35466cfde23f515012e0d1a37d2b498a4cdefea24e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "994a438dd9e43263d0e2ee35466cfde23f515012e0d1a37d2b498a4cdefea24e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "994a438dd9e43263d0e2ee35466cfde23f515012e0d1a37d2b498a4cdefea24e", kill_on_drop: false }`
[INFO] [stdout] 994a438dd9e43263d0e2ee35466cfde23f515012e0d1a37d2b498a4cdefea24e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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] f15b6a47389a38993ce8416f3909f935e5fae63d32530b93eabadd701ae3319f
[INFO] running `Command { std: "docker" "start" "-a" "f15b6a47389a38993ce8416f3909f935e5fae63d32530b93eabadd701ae3319f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling openssl-sys v0.9.66
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling try_from v0.3.2
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling object v0.26.2
[INFO] [stderr]    Compiling hyper v0.12.36
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling publicsuffix v1.5.6
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling flate2 v1.0.21
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling tiny-keccak v1.5.0
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling http v0.1.21
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling oasis-borsh-derive-internal v0.2.14
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling oasis-borsh-derive v0.2.10
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling oasis-macros v0.3.0
[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/oasis-macros-0.3.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic, type_ascription)]
[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 `oasis-macros` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f15b6a47389a38993ce8416f3909f935e5fae63d32530b93eabadd701ae3319f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f15b6a47389a38993ce8416f3909f935e5fae63d32530b93eabadd701ae3319f", kill_on_drop: false }`
[INFO] [stdout] f15b6a47389a38993ce8416f3909f935e5fae63d32530b93eabadd701ae3319f