[INFO] fetching crate either_field 1.2.0...
[INFO] checking either_field-1.2.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate either_field 1.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate either_field 1.2.0
[INFO] finished tweaking crates.io crate either_field 1.2.0
[INFO] tweaked toml for crates.io crate either_field 1.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate either_field 1.2.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate either_field 1.2.0 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 89d03f52f1825997eea6b4fe033f576e91a33ee103a85d1c77963da1e78ea7b3
[INFO] running `Command { std: "docker" "start" "-a" "89d03f52f1825997eea6b4fe033f576e91a33ee103a85d1c77963da1e78ea7b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "89d03f52f1825997eea6b4fe033f576e91a33ee103a85d1c77963da1e78ea7b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89d03f52f1825997eea6b4fe033f576e91a33ee103a85d1c77963da1e78ea7b3", kill_on_drop: false }`
[INFO] [stdout] 89d03f52f1825997eea6b4fe033f576e91a33ee103a85d1c77963da1e78ea7b3
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1454fb21ea0ae9778c21578491bee8daaba7d8a4b5f40decb0d5fd155b47b093
[INFO] running `Command { std: "docker" "start" "-a" "1454fb21ea0ae9778c21578491bee8daaba7d8a4b5f40decb0d5fd155b47b093", kill_on_drop: false }`
[INFO] [stderr]     Checking proc-macro2 v1.0.94
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.100
[INFO] [stderr]     Checking either_field v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `push_if_empty_tuple` is never used
[INFO] [stdout]   --> src/helper.rs:48:15
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub(crate) fn push_if_empty_tuple(x: &Type, delete: bool, vec: &mut Vec<bool>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `push_if_empty_tuple` is never used
[INFO] [stdout]   --> src/helper.rs:48:15
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub(crate) fn push_if_empty_tuple(x: &Type, delete: bool, vec: &mut Vec<bool>) {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.98s
[INFO] running `Command { std: "docker" "inspect" "1454fb21ea0ae9778c21578491bee8daaba7d8a4b5f40decb0d5fd155b47b093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1454fb21ea0ae9778c21578491bee8daaba7d8a4b5f40decb0d5fd155b47b093", kill_on_drop: false }`
[INFO] [stdout] 1454fb21ea0ae9778c21578491bee8daaba7d8a4b5f40decb0d5fd155b47b093