[INFO] fetching crate rill 0.21.0...
[INFO] checking rill-0.21.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rill 0.21.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate rill 0.21.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rill 0.21.0
[INFO] finished tweaking crates.io crate rill 0.21.0
[INFO] tweaked toml for crates.io crate rill 0.21.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 157 packages
[INFO] [stderr]       Adding base64 v0.13.1 (latest: v0.22.0)
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding cfg_aliases v0.1.1 (latest: v0.2.0)
[INFO] [stderr]       Adding convert_case v0.4.0 (latest: v0.6.0)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding env_logger v0.8.4 (latest: v0.11.3)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding h2 v0.3.26 (latest: v0.4.4)
[INFO] [stderr]       Adding headers v0.3.9 (latest: v0.4.0)
[INFO] [stderr]       Adding headers-core v0.2.0 (latest: v0.3.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding http v0.2.12 (latest: v1.1.0)
[INFO] [stderr]       Adding http-body v0.4.6 (latest: v1.0.0)
[INFO] [stderr]       Adding hyper v0.14.28 (latest: v1.2.0)
[INFO] [stderr]       Adding input_buffer v0.4.0 (latest: v0.5.0)
[INFO] [stderr]       Adding meio v0.82.0 (latest: v0.97.0)
[INFO] [stderr]       Adding meio-connect v0.82.0 (latest: v0.97.0)
[INFO] [stderr]       Adding meio-protocol v0.82.0 (latest: v0.97.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding rill-protocol v0.21.0 (latest: v0.41.0)
[INFO] [stderr]       Adding serde_qs v0.8.5 (latest: v0.12.0)
[INFO] [stderr]       Adding sha-1 v0.9.8 (latest: v0.10.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding tokio-tungstenite v0.13.0 (latest: v0.21.0)
[INFO] [stderr]       Adding tokio-util v0.6.10 (latest: v0.7.10)
[INFO] [stderr]       Adding tungstenite v0.12.0 (latest: v0.21.0)
[INFO] [stderr]       Adding uuid v0.8.2 (latest: v1.8.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded meio-connect v0.82.0
[INFO] [stderr]   Downloaded rill-protocol v0.21.0
[INFO] [stderr]   Downloaded metacrate v0.1.2
[INFO] [stderr]   Downloaded tungstenite v0.12.0
[INFO] [stderr]   Downloaded meio v0.82.0
[INFO] [stderr]   Downloaded tokio-tungstenite v0.13.0
[INFO] [stderr]   Downloaded input_buffer v0.4.0
[INFO] [stderr]   Downloaded meio-protocol v0.82.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6b6f43456728a33d80b180d14bf5fbb960662b90f3253ddee2a94a3ea065cf0
[INFO] running `Command { std: "docker" "start" "-a" "f6b6f43456728a33d80b180d14bf5fbb960662b90f3253ddee2a94a3ea065cf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6b6f43456728a33d80b180d14bf5fbb960662b90f3253ddee2a94a3ea065cf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6b6f43456728a33d80b180d14bf5fbb960662b90f3253ddee2a94a3ea065cf0", kill_on_drop: false }`
[INFO] [stdout] f6b6f43456728a33d80b180d14bf5fbb960662b90f3253ddee2a94a3ea065cf0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f69e88bce500b419395e9d852868a6775fe2d877be7320060e9536e0f53d32f5
[INFO] running `Command { std: "docker" "start" "-a" "f69e88bce500b419395e9d852868a6775fe2d877be7320060e9536e0f53d32f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking opaque-debug v0.3.1
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]     Checking input_buffer v0.4.0
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]    Compiling nix v0.28.0
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking metacrate v0.1.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking sha-1 v0.9.8
[INFO] [stderr]     Checking tungstenite v0.12.0
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking pin-project v1.1.5
[INFO] [stderr]     Checking ctrlc v3.4.4
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking tokio-util v0.7.10
[INFO] [stderr]     Checking tokio-util v0.6.10
[INFO] [stderr]     Checking tokio-tungstenite v0.13.0
[INFO] [stderr]     Checking h2 v0.3.26
[INFO] [stderr]     Checking meio v0.82.0
[INFO] [stderr]     Checking meio-protocol v0.82.0
[INFO] [stderr]     Checking serde_qs v0.8.5
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking rill-protocol v0.21.0
[INFO] [stderr]     Checking hyper v0.14.28
[INFO] [stderr]     Checking meio-connect v0.82.0
[INFO] [stderr]     Checking rill v0.21.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Internal` is never constructed
[INFO] [stdout]  --> src/protocol.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub struct Internal<T: Send + 'static>(pub T);
[INFO] [stdout]   |                ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Internal` is never constructed
[INFO] [stdout]  --> src/protocol.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub struct Internal<T: Send + 'static>(pub T);
[INFO] [stdout]   |                ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.93s
[INFO] running `Command { std: "docker" "inspect" "f69e88bce500b419395e9d852868a6775fe2d877be7320060e9536e0f53d32f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f69e88bce500b419395e9d852868a6775fe2d877be7320060e9536e0f53d32f5", kill_on_drop: false }`
[INFO] [stdout] f69e88bce500b419395e9d852868a6775fe2d877be7320060e9536e0f53d32f5