[INFO] fetching crate modrpc-hub 0.0.1...
[INFO] testing modrpc-hub-0.0.1 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate modrpc-hub 0.0.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate modrpc-hub 0.0.1
[INFO] finished tweaking crates.io crate modrpc-hub 0.0.1
[INFO] tweaked toml for crates.io crate modrpc-hub 0.0.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate modrpc-hub 0.0.1 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate modrpc-hub 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e
[INFO] running `Command { std: "docker" "start" "04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling lock_api v0.4.13
[INFO] [stderr]    Compiling thid v0.0.1
[INFO] [stderr]    Compiling utf-8 v0.7.6
[INFO] [stderr]    Compiling mproto v0.2.1
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling slab v0.4.11
[INFO] [stderr]    Compiling data-encoding v2.9.0
[INFO] [stderr]    Compiling async-event v0.2.1
[INFO] [stderr]    Compiling slotmap v1.0.7
[INFO] [stderr]    Compiling waker-fn v1.2.0
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling ispawn v0.0.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling fastrand v1.9.0
[INFO] [stderr]    Compiling modrpc-executor v0.0.1
[INFO] [stderr]    Compiling pollster v0.3.0
[INFO] [stderr]    Compiling siphasher v1.0.1
[INFO] [stderr]    Compiling burstq v0.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/mproto-0.2.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(marker_trait_attr)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling oneshot v0.1.11
[INFO] [stderr]    Compiling localq v0.0.2
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mproto` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e", kill_on_drop: false }`
[INFO] [stdout] 04afea947c10178e57553b7fb2842ff1e8c4421461bfe05bc5f1126e6512157e
