[INFO] fetching crate oasis-macros 0.3.0...
[INFO] testing oasis-macros-0.3.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate oasis-macros 0.3.0 into /workspace/builds/worker-63/source
[INFO] validating manifest of crates.io crate oasis-macros 0.3.0 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-macros 0.3.0
[INFO] finished tweaking crates.io crate oasis-macros 0.3.0
[INFO] tweaked toml for crates.io crate oasis-macros 0.3.0 written to /workspace/builds/worker-63/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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] 7990558deaff23a3361729eeb90154c198f556e1605c5682d8ad5e9114af9996
[INFO] running `Command { std: "docker" "start" "-a" "7990558deaff23a3361729eeb90154c198f556e1605c5682d8ad5e9114af9996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7990558deaff23a3361729eeb90154c198f556e1605c5682d8ad5e9114af9996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7990558deaff23a3361729eeb90154c198f556e1605c5682d8ad5e9114af9996", kill_on_drop: false }`
[INFO] [stdout] 7990558deaff23a3361729eeb90154c198f556e1605c5682d8ad5e9114af9996
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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] 23131fcde38eb1f222ba1fbe83d6ea22f4ad55c2fc8cd18fef6c4f5a8beb4956
[INFO] running `Command { std: "docker" "start" "-a" "23131fcde38eb1f222ba1fbe83d6ea22f4ad55c2fc8cd18fef6c4f5a8beb4956", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling tiny-keccak v1.5.0
[INFO] [stderr]    Compiling oasis-macros v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> 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] running `Command { std: "docker" "inspect" "23131fcde38eb1f222ba1fbe83d6ea22f4ad55c2fc8cd18fef6c4f5a8beb4956", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23131fcde38eb1f222ba1fbe83d6ea22f4ad55c2fc8cd18fef6c4f5a8beb4956", kill_on_drop: false }`
[INFO] [stdout] 23131fcde38eb1f222ba1fbe83d6ea22f4ad55c2fc8cd18fef6c4f5a8beb4956