[INFO] fetching crate mechutil 0.2.2...
[INFO] checking mechutil-0.2.2 against try#0edd13c68435d50367c79cef43ac2768d2ec4f3d for pr-129422
[INFO] extracting crate mechutil 0.2.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate mechutil 0.2.2 on toolchain 0edd13c68435d50367c79cef43ac2768d2ec4f3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mechutil 0.2.2
[INFO] finished tweaking crates.io crate mechutil 0.2.2
[INFO] tweaked toml for crates.io crate mechutil 0.2.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d988bb4dae4b558e61cf6821088e3e86ca7a73b58b5f6c4bb23e6250bd4d9930
[INFO] running `Command { std: "docker" "start" "-a" "d988bb4dae4b558e61cf6821088e3e86ca7a73b58b5f6c4bb23e6250bd4d9930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d988bb4dae4b558e61cf6821088e3e86ca7a73b58b5f6c4bb23e6250bd4d9930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d988bb4dae4b558e61cf6821088e3e86ca7a73b58b5f6c4bb23e6250bd4d9930", kill_on_drop: false }`
[INFO] [stdout] d988bb4dae4b558e61cf6821088e3e86ca7a73b58b5f6c4bb23e6250bd4d9930
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d898a61ebeba077dde1a9d78c0bc96c52f0335405d8924171422a41fe5f91a5b
[INFO] running `Command { std: "docker" "start" "-a" "d898a61ebeba077dde1a9d78c0bc96c52f0335405d8924171422a41fe5f91a5b", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_json v1.0.127
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking indexmap v2.5.0
[INFO] [stderr]     Checking mechutil v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/variant.rs:170:25
[INFO] [stdout]     |
[INFO] [stdout] 170 |                         i => Ok(VariantValue::Int64(int)),
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/variant.rs:177:25
[INFO] [stdout]     |
[INFO] [stdout] 177 |                         u => Ok(VariantValue::UInt64(uint)),
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/variant.rs:170:25
[INFO] [stdout]     |
[INFO] [stdout] 170 |                         i => Ok(VariantValue::Int64(int)),
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/variant.rs:177:25
[INFO] [stdout]     |
[INFO] [stdout] 177 |                         u => Ok(VariantValue::UInt64(uint)),
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.88s
[INFO] running `Command { std: "docker" "inspect" "d898a61ebeba077dde1a9d78c0bc96c52f0335405d8924171422a41fe5f91a5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d898a61ebeba077dde1a9d78c0bc96c52f0335405d8924171422a41fe5f91a5b", kill_on_drop: false }`
[INFO] [stdout] d898a61ebeba077dde1a9d78c0bc96c52f0335405d8924171422a41fe5f91a5b