[INFO] fetching crate variant-map 0.1.1...
[INFO] checking variant-map-0.1.1 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate variant-map 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate variant-map 0.1.1 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 variant-map 0.1.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate variant-map 0.1.1
[INFO] tweaked toml for crates.io crate variant-map 0.1.1 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 18 packages to latest compatible versions
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded variant-map-derive v0.1.0
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd537f2ae72e30c9f768c1a5971d961efdb64af74e42f6b49ab7b510a620743a
[INFO] running `Command { std: "docker" "start" "-a" "fd537f2ae72e30c9f768c1a5971d961efdb64af74e42f6b49ab7b510a620743a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd537f2ae72e30c9f768c1a5971d961efdb64af74e42f6b49ab7b510a620743a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd537f2ae72e30c9f768c1a5971d961efdb64af74e42f6b49ab7b510a620743a", kill_on_drop: false }`
[INFO] [stdout] fd537f2ae72e30c9f768c1a5971d961efdb64af74e42f6b49ab7b510a620743a
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb0e4d344b2d1ea71270272fc514e0de06aea1c6f4b7f68b284685be796e59cb
[INFO] running `Command { std: "docker" "start" "-a" "bb0e4d344b2d1ea71270272fc514e0de06aea1c6f4b7f68b284685be796e59cb", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_json v1.0.127
[INFO] [stderr]     Checking variant-map v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> tests/struct_tests.rs:75:43
[INFO] [stdout]    |
[INFO] [stdout] 75 |     struct MyStructVisitor<T>(PhantomData<(T)>);
[INFO] [stdout]    |                                           ^ ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 75 -     struct MyStructVisitor<T>(PhantomData<(T)>);
[INFO] [stdout] 75 +     struct MyStructVisitor<T>(PhantomData<T>);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> tests/struct_tests.rs:75:43
[INFO] [stdout]    |
[INFO] [stdout] 75 |     struct MyStructVisitor<T>(PhantomData<(T)>);
[INFO] [stdout]    |                                           ^ ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 75 -     struct MyStructVisitor<T>(PhantomData<(T)>);
[INFO] [stdout] 75 +     struct MyStructVisitor<T>(PhantomData<T>);
[INFO] [stdout]    |
[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 0.70s
[INFO] running `Command { std: "docker" "inspect" "bb0e4d344b2d1ea71270272fc514e0de06aea1c6f4b7f68b284685be796e59cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb0e4d344b2d1ea71270272fc514e0de06aea1c6f4b7f68b284685be796e59cb", kill_on_drop: false }`
[INFO] [stdout] bb0e4d344b2d1ea71270272fc514e0de06aea1c6f4b7f68b284685be796e59cb