[INFO] fetching crate ramp-api 0.2.3...
[INFO] testing ramp-api-0.2.3 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate ramp-api 0.2.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate ramp-api 0.2.3 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ramp-api 0.2.3
[INFO] finished tweaking crates.io crate ramp-api 0.2.3
[INFO] tweaked toml for crates.io crate ramp-api 0.2.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simple_asn1 v0.4.1
[INFO] [stderr]   Downloaded dirs v3.0.2
[INFO] [stderr]   Downloaded schemars_derive v0.8.3
[INFO] [stderr]   Downloaded async-recursion v0.3.2
[INFO] [stderr]   Downloaded jsonwebtoken v7.2.0
[INFO] [stderr]   Downloaded httparse v1.3.6
[INFO] [stderr]   Downloaded hyper v0.14.5
[INFO] [stderr]   Downloaded nom_pem v4.0.0
[INFO] [stderr]   Downloaded pem v0.8.3
[INFO] [stderr]   Downloaded dyn-clone v1.0.4
[INFO] [stderr]   Downloaded serde_derive_internals v0.25.0
[INFO] [stderr]   Downloaded hyperx v1.2.0
[INFO] [stderr]   Downloaded schemars v0.8.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7bb10d973ef38a3e3c21a3bddf90c0c80f0b2a107b45dfc4e91f156f759486d7
[INFO] running `Command { std: "docker" "start" "-a" "7bb10d973ef38a3e3c21a3bddf90c0c80f0b2a107b45dfc4e91f156f759486d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7bb10d973ef38a3e3c21a3bddf90c0c80f0b2a107b45dfc4e91f156f759486d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bb10d973ef38a3e3c21a3bddf90c0c80f0b2a107b45dfc4e91f156f759486d7", kill_on_drop: false }`
[INFO] [stdout] 7bb10d973ef38a3e3c21a3bddf90c0c80f0b2a107b45dfc4e91f156f759486d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c5420014628dc2820c36bb66dfa2fadb4bf8a7aee29bf073f2c083c3dcbaf74
[INFO] running `Command { std: "docker" "start" "-a" "2c5420014628dc2820c36bb66dfa2fadb4bf8a7aee29bf073f2c083c3dcbaf74", kill_on_drop: false }`
[INFO] [stderr]    Compiling httparse v1.3.6
[INFO] [stderr]    Compiling schemars v0.8.3
[INFO] [stderr]    Compiling hyperx v1.2.0
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling tracing v0.1.26
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling pem v0.8.3
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling simple_asn1 v0.4.1
[INFO] [stderr]    Compiling jsonwebtoken v7.2.0
[INFO] [stderr]    Compiling tokio-util v0.6.8
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling h2 v0.3.4
[INFO] [stderr]    Compiling hyper v0.14.5
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling reqwest v0.11.4
[INFO] [stderr]    Compiling ramp-api v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:88:1
[INFO] [stdout]    |
[INFO] [stdout] 88 | #![feature(async_stream)]
[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 `ramp-api` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2c5420014628dc2820c36bb66dfa2fadb4bf8a7aee29bf073f2c083c3dcbaf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c5420014628dc2820c36bb66dfa2fadb4bf8a7aee29bf073f2c083c3dcbaf74", kill_on_drop: false }`
[INFO] [stdout] 2c5420014628dc2820c36bb66dfa2fadb4bf8a7aee29bf073f2c083c3dcbaf74