[INFO] fetching crate easy-ffi-wrapper 0.1.1...
[INFO] checking easy-ffi-wrapper-0.1.1 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate easy-ffi-wrapper 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate easy-ffi-wrapper 0.1.1 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "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-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 81b2641a7c4e77f85959034e855817bd26be5b99dd91839913815b9340a94263
[INFO] running `Command { std: "docker" "start" "-a" "81b2641a7c4e77f85959034e855817bd26be5b99dd91839913815b9340a94263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81b2641a7c4e77f85959034e855817bd26be5b99dd91839913815b9340a94263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81b2641a7c4e77f85959034e855817bd26be5b99dd91839913815b9340a94263", kill_on_drop: false }`
[INFO] [stdout] 81b2641a7c4e77f85959034e855817bd26be5b99dd91839913815b9340a94263
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10ccd527c9ae3bcb92d6f9f0f00dba2bc05b00b8d6708c4b49c54533062a881d
[INFO] running `Command { std: "docker" "start" "-a" "10ccd527c9ae3bcb92d6f9f0f00dba2bc05b00b8d6708c4b49c54533062a881d", 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] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `easy-ffi-wrapper` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "10ccd527c9ae3bcb92d6f9f0f00dba2bc05b00b8d6708c4b49c54533062a881d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10ccd527c9ae3bcb92d6f9f0f00dba2bc05b00b8d6708c4b49c54533062a881d", kill_on_drop: false }`
[INFO] [stdout] 10ccd527c9ae3bcb92d6f9f0f00dba2bc05b00b8d6708c4b49c54533062a881d