[INFO] fetching crate easy-ffi-wrapper 0.1.1...
[INFO] checking easy-ffi-wrapper-0.1.1 against master#3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777 for pr-132289
[INFO] extracting crate easy-ffi-wrapper 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate easy-ffi-wrapper 0.1.1 on toolchain 3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate easy-ffi-wrapper 0.1.1
[INFO] finished tweaking crates.io crate easy-ffi-wrapper 0.1.1
[INFO] tweaked toml for crates.io crate easy-ffi-wrapper 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" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "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" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b1d97aeb18c5b9809593aab5f22d15514ccdb253e8e241171b01c660416d66b
[INFO] running `Command { std: "docker" "start" "-a" "7b1d97aeb18c5b9809593aab5f22d15514ccdb253e8e241171b01c660416d66b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b1d97aeb18c5b9809593aab5f22d15514ccdb253e8e241171b01c660416d66b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b1d97aeb18c5b9809593aab5f22d15514ccdb253e8e241171b01c660416d66b", kill_on_drop: false }`
[INFO] [stdout] 7b1d97aeb18c5b9809593aab5f22d15514ccdb253e8e241171b01c660416d66b
[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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+3f1be1ec7ec3d8e80beb381ee82164a0aa3ca777" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d09797319ecd872ba872d522289814358611b2aeb6322cd284a624233f89fed6
[INFO] running `Command { std: "docker" "start" "-a" "d09797319ecd872ba872d522289814358611b2aeb6322cd284a624233f89fed6", kill_on_drop: false }`
[INFO] [stderr]     Checking easy-ffi-wrapper v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: unused return value of `must_use` that must be used
[INFO] [stdout]    --> src/lib.rs:634:9
[INFO] [stdout]     |
[INFO] [stdout] 634 |         format!("{:?}", A::new());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:2:9
[INFO] [stdout]     |
[INFO] [stdout] 2   | #![deny(warnings, missing_debug_implementations, missing_docs)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout]     = note: this error originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `easy-ffi-wrapper` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "d09797319ecd872ba872d522289814358611b2aeb6322cd284a624233f89fed6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d09797319ecd872ba872d522289814358611b2aeb6322cd284a624233f89fed6", kill_on_drop: false }`
[INFO] [stdout] d09797319ecd872ba872d522289814358611b2aeb6322cd284a624233f89fed6
