[INFO] fetching crate serde-pyobject 0.4.0...
[INFO] checking serde-pyobject-0.4.0 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate serde-pyobject 0.4.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate serde-pyobject 0.4.0 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde-pyobject 0.4.0
[INFO] finished tweaking crates.io crate serde-pyobject 0.4.0
[INFO] tweaked toml for crates.io crate serde-pyobject 0.4.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 27 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pyo3-macros v0.22.2
[INFO] [stderr]   Downloaded pyo3-build-config v0.22.2
[INFO] [stderr]   Downloaded pyo3 v0.22.2
[INFO] [stderr]   Downloaded pyo3-ffi v0.22.2
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.22.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ef26cf149369b1e2e2dd98ec527d0b9d1c624ba67a042194ba1ca68022cdafa
[INFO] running `Command { std: "docker" "start" "-a" "4ef26cf149369b1e2e2dd98ec527d0b9d1c624ba67a042194ba1ca68022cdafa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ef26cf149369b1e2e2dd98ec527d0b9d1c624ba67a042194ba1ca68022cdafa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ef26cf149369b1e2e2dd98ec527d0b9d1c624ba67a042194ba1ca68022cdafa", kill_on_drop: false }`
[INFO] [stdout] 4ef26cf149369b1e2e2dd98ec527d0b9d1c624ba67a042194ba1ca68022cdafa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0343671977e5c8bbabfdb47ba0d0ac0e21d48675ab9428f803a1ecc2dfd9a1a
[INFO] running `Command { std: "docker" "start" "-a" "b0343671977e5c8bbabfdb47ba0d0ac0e21d48675ab9428f803a1ecc2dfd9a1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling indoc v2.0.5
[INFO] [stderr]     Checking unindent v0.2.3
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling pyo3-build-config v0.22.2
[INFO] [stderr]    Compiling pyo3-ffi v0.22.2
[INFO] [stderr]    Compiling pyo3-macros-backend v0.22.2
[INFO] [stderr]    Compiling pyo3 v0.22.2
[INFO] [stderr]    Compiling serde_derive v1.0.209
[INFO] [stderr]     Checking serde v1.0.209
[INFO] [stderr]    Compiling pyo3-macros v0.22.2
[INFO] [stderr]     Checking serde_json v1.0.127
[INFO] [stderr]     Checking serde-pyobject v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `UnitStruct` is never constructed
[INFO] [stdout]   --> tests/to_json_to_pyobject.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct UnitStruct;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TupleStruct` is never constructed
[INFO] [stdout]   --> tests/to_json_to_pyobject.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | struct TupleStruct(u8, u8, u8);
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.45s
[INFO] running `Command { std: "docker" "inspect" "b0343671977e5c8bbabfdb47ba0d0ac0e21d48675ab9428f803a1ecc2dfd9a1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0343671977e5c8bbabfdb47ba0d0ac0e21d48675ab9428f803a1ecc2dfd9a1a", kill_on_drop: false }`
[INFO] [stdout] b0343671977e5c8bbabfdb47ba0d0ac0e21d48675ab9428f803a1ecc2dfd9a1a