[INFO] fetching crate slings 0.3.46...
[INFO] checking slings-0.3.46 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate slings 0.3.46 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate slings 0.3.46 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slings 0.3.46
[INFO] finished tweaking crates.io crate slings 0.3.46
[INFO] tweaked toml for crates.io crate slings 0.3.46 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate slings 0.3.46 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded io-uring v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5664d0fb44621b4c930766246f1248faed9568c5c05cf9c1c29f4a8f1a55cd2
[INFO] running `Command { std: "docker" "start" "-a" "d5664d0fb44621b4c930766246f1248faed9568c5c05cf9c1c29f4a8f1a55cd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5664d0fb44621b4c930766246f1248faed9568c5c05cf9c1c29f4a8f1a55cd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5664d0fb44621b4c930766246f1248faed9568c5c05cf9c1c29f4a8f1a55cd2", kill_on_drop: false }`
[INFO] [stdout] d5664d0fb44621b4c930766246f1248faed9568c5c05cf9c1c29f4a8f1a55cd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c3d0966574e9b7a61dc64359ad169abe296e454de688519d1c3e761c135a006
[INFO] running `Command { std: "docker" "start" "-a" "4c3d0966574e9b7a61dc64359ad169abe296e454de688519d1c3e761c135a006", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling io-uring v0.6.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking async-task v4.4.0
[INFO] [stderr]     Checking socket2 v0.5.3
[INFO] [stderr]     Checking slings v0.3.46 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/driver/mod.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |     Ignored(Box<dyn Any>),
[INFO] [stdout]     |     ------- ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 192 |     Ignored(()),
[INFO] [stdout]     |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/driver/mod.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |     Ignored(Box<dyn Any>),
[INFO] [stdout]     |     ------- ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 192 |     Ignored(()),
[INFO] [stdout]     |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.12s
[INFO] running `Command { std: "docker" "inspect" "4c3d0966574e9b7a61dc64359ad169abe296e454de688519d1c3e761c135a006", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c3d0966574e9b7a61dc64359ad169abe296e454de688519d1c3e761c135a006", kill_on_drop: false }`
[INFO] [stdout] 4c3d0966574e9b7a61dc64359ad169abe296e454de688519d1c3e761c135a006