[INFO] fetching crate frunk_core 0.4.0...
[INFO] checking frunk_core-0.4.0 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate frunk_core 0.4.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate frunk_core 0.4.0 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate frunk_core 0.4.0
[INFO] finished tweaking crates.io crate frunk_core 0.4.0
[INFO] tweaked toml for crates.io crate frunk_core 0.4.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded frunk_proc_macros_impl v0.0.5
[INFO] [stderr]   Downloaded frunk_proc_macros v0.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 714d7a0a3cac1f3a20e69d889006beb085a2e79afcf8d422a0c5d21fbc8e87f4
[INFO] running `Command { std: "docker" "start" "-a" "714d7a0a3cac1f3a20e69d889006beb085a2e79afcf8d422a0c5d21fbc8e87f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "714d7a0a3cac1f3a20e69d889006beb085a2e79afcf8d422a0c5d21fbc8e87f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "714d7a0a3cac1f3a20e69d889006beb085a2e79afcf8d422a0c5d21fbc8e87f4", kill_on_drop: false }`
[INFO] [stdout] 714d7a0a3cac1f3a20e69d889006beb085a2e79afcf8d422a0c5d21fbc8e87f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a2730c952cddf49c0d85e90dc86d752c7b7a94d8fdeee7c9477476aacbab576
[INFO] running `Command { std: "docker" "start" "-a" "4a2730c952cddf49c0d85e90dc86d752c7b7a94d8fdeee7c9477476aacbab576", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling frunk_core v0.3.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]     Checking frunk_core v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling frunk_proc_macro_helpers v0.0.5
[INFO] [stderr]    Compiling frunk_derives v0.3.2
[INFO] [stderr]    Compiling frunk_proc_macros_impl v0.0.5
[INFO] [stderr]     Checking frunk_proc_macros v0.0.5
[INFO] [stderr]     Checking frunk v0.3.2
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]     --> src/coproduct.rs:1125:21
[INFO] [stdout]      |
[INFO] [stdout] 1125 |                 let res: Result<CNil, _> = cnil.subset();
[INFO] [stdout]      |                     ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.59s
[INFO] running `Command { std: "docker" "inspect" "4a2730c952cddf49c0d85e90dc86d752c7b7a94d8fdeee7c9477476aacbab576", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a2730c952cddf49c0d85e90dc86d752c7b7a94d8fdeee7c9477476aacbab576", kill_on_drop: false }`
[INFO] [stdout] 4a2730c952cddf49c0d85e90dc86d752c7b7a94d8fdeee7c9477476aacbab576