[INFO] fetching crate thot-local 0.10.0-intermediate...
[INFO] testing thot-local-0.10.0-intermediate against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate thot-local 0.10.0-intermediate into /workspace/builds/worker-2-tc2/source
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain
[INFO] started tweaking crates.io crate thot-local 0.10.0-intermediate
[INFO] finished tweaking crates.io crate thot-local 0.10.0-intermediate
[INFO] tweaked toml for crates.io crate thot-local 0.10.0-intermediate written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate thot-local 0.10.0-intermediate 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 118 packages to highest compatible versions
[INFO] [stderr]       Adding directories v4.0.1 (available: v6.0.0)
[INFO] [stderr]       Adding fake v2.10.0 (available: v5.1.0)
[INFO] [stderr]       Adding rand v0.8.8 (available: v0.10.3)
[INFO] [stderr]       Adding validator v0.14.0 (available: v0.21.0)
[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-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f
[INFO] running `Command { std: "docker" "start" "351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f", 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" "351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f" "/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" "351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f", 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" "351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling directories v4.0.1
[INFO] [stderr]    Compiling cluFlock v1.2.7
[INFO] [stderr]    Compiling serde v1.0.229
[INFO] [stderr]    Compiling uuid v1.28.0
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling url v2.5.8
[INFO] [stderr]    Compiling chrono v0.4.45
[INFO] [stderr]    Compiling settings_manager v0.0.2
[INFO] [stderr]    Compiling validator_types v0.14.0
[INFO] [stderr]    Compiling validator v0.14.0
[INFO] [stderr]    Compiling thot-core v0.10.0-intermediate
[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/thot-core-0.10.0-intermediate/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io_error_more)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `thot-core` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f", kill_on_drop: false }`
[INFO] [stdout] 351e1662ee3d8b4868c92ad6b144faca4b987a3b26655995ad0b99c9196de89f
