[INFO] fetching crate generations 2.0.0...
[INFO] checking generations-2.0.0 against master#a3f76a26e045a760bb1163b7eab36872985242d5 for pr-130930
[INFO] extracting crate generations 2.0.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate generations 2.0.0 on toolchain a3f76a26e045a760bb1163b7eab36872985242d5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate generations 2.0.0
[INFO] finished tweaking crates.io crate generations 2.0.0
[INFO] tweaked toml for crates.io crate generations 2.0.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 564b3a8b10b59774101332fc8f79f0faf145305c00f30533d9c7ebe885d72ed9
[INFO] running `Command { std: "docker" "start" "-a" "564b3a8b10b59774101332fc8f79f0faf145305c00f30533d9c7ebe885d72ed9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "564b3a8b10b59774101332fc8f79f0faf145305c00f30533d9c7ebe885d72ed9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "564b3a8b10b59774101332fc8f79f0faf145305c00f30533d9c7ebe885d72ed9", kill_on_drop: false }`
[INFO] [stdout] 564b3a8b10b59774101332fc8f79f0faf145305c00f30533d9c7ebe885d72ed9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 627b45fdc65cb91fd23709659fed191ebcc96deb36c576cffd5dfeb3efd6d229
[INFO] running `Command { std: "docker" "start" "-a" "627b45fdc65cb91fd23709659fed191ebcc96deb36c576cffd5dfeb3efd6d229", kill_on_drop: false }`
[INFO] [stderr]     Checking generations v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]    --> src/lib.rs:391:9
[INFO] [stdout]     |
[INFO] [stdout] 391 |         format!("{:?}", &thing);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "627b45fdc65cb91fd23709659fed191ebcc96deb36c576cffd5dfeb3efd6d229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "627b45fdc65cb91fd23709659fed191ebcc96deb36c576cffd5dfeb3efd6d229", kill_on_drop: false }`
[INFO] [stdout] 627b45fdc65cb91fd23709659fed191ebcc96deb36c576cffd5dfeb3efd6d229