[INFO] fetching crate test-impl 0.2.0...
[INFO] checking test-impl-0.2.0 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate test-impl 0.2.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate test-impl 0.2.0 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 test-impl 0.2.0
[INFO] finished tweaking crates.io crate test-impl 0.2.0
[INFO] tweaked toml for crates.io crate test-impl 0.2.0 written to /workspace/builds/worker-7-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 8 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.76)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 91c9ef0f29b7b956a8dfcd2bfa874278c872d098b0983d437898e920ad6d8c06
[INFO] running `Command { std: "docker" "start" "-a" "91c9ef0f29b7b956a8dfcd2bfa874278c872d098b0983d437898e920ad6d8c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91c9ef0f29b7b956a8dfcd2bfa874278c872d098b0983d437898e920ad6d8c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91c9ef0f29b7b956a8dfcd2bfa874278c872d098b0983d437898e920ad6d8c06", kill_on_drop: false }`
[INFO] [stdout] 91c9ef0f29b7b956a8dfcd2bfa874278c872d098b0983d437898e920ad6d8c06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7e5ccf81d899d9d2dd65e72ce3e44a1dee12824fb76fcd087c81efba3c21348d
[INFO] running `Command { std: "docker" "start" "-a" "7e5ccf81d899d9d2dd65e72ce3e44a1dee12824fb76fcd087c81efba3c21348d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking test-impl v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `ExampleTrait` is never used
[INFO] [stdout]  --> tests/example.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait ExampleTrait: Debug {
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ExampleStruct` is never constructed
[INFO] [stdout]   --> tests/example.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct ExampleStruct;
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ExampleStruct2` is never constructed
[INFO] [stdout]   --> tests/example.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct ExampleStruct2;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Whaa` is never used
[INFO] [stdout]  --> tests/example_lifetime.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait Whaa {}
[INFO] [stdout]   |       ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings 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 2.34s
[INFO] running `Command { std: "docker" "inspect" "7e5ccf81d899d9d2dd65e72ce3e44a1dee12824fb76fcd087c81efba3c21348d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e5ccf81d899d9d2dd65e72ce3e44a1dee12824fb76fcd087c81efba3c21348d", kill_on_drop: false }`
[INFO] [stdout] 7e5ccf81d899d9d2dd65e72ce3e44a1dee12824fb76fcd087c81efba3c21348d