[INFO] fetching crate iou 0.3.3...
[INFO] checking iou-0.3.3 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate iou 0.3.3 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate iou 0.3.3
[INFO] finished tweaking crates.io crate iou 0.3.3
[INFO] tweaked toml for crates.io crate iou 0.3.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate iou 0.3.3 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 9 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.9.1)
[INFO] [stderr]       Adding nix v0.18.0 (available: v0.30.1)
[INFO] [stderr]       Adding semver v0.9.0 (available: v1.0.26)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98102d96439069db6d10ec6571c2c7981b8ec14e735a2a7713c67da161d39a9b
[INFO] running `Command { std: "docker" "start" "-a" "98102d96439069db6d10ec6571c2c7981b8ec14e735a2a7713c67da161d39a9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98102d96439069db6d10ec6571c2c7981b8ec14e735a2a7713c67da161d39a9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98102d96439069db6d10ec6571c2c7981b8ec14e735a2a7713c67da161d39a9b", kill_on_drop: false }`
[INFO] [stdout] 98102d96439069db6d10ec6571c2c7981b8ec14e735a2a7713c67da161d39a9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2baf543f5aa1d1cae7c9cdb6d59f890033f24b0b0e69e647556f8d6304c2d81
[INFO] running `Command { std: "docker" "start" "-a" "f2baf543f5aa1d1cae7c9cdb6d59f890033f24b0b0e69e647556f8d6304c2d81", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling cc v1.2.27
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling uring-sys v0.7.4
[INFO] [stderr]     Checking iou v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> tests/write.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         drop(bufs); // hold bufs until after io completes
[INFO] [stdout]    |         ^^^^^----^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              argument has type `[IoSlice<'_>; 1]`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 43 -         drop(bufs); // hold bufs until after io completes
[INFO] [stdout] 43 +         let _ = bufs; // hold bufs until after io completes
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.65s
[INFO] running `Command { std: "docker" "inspect" "f2baf543f5aa1d1cae7c9cdb6d59f890033f24b0b0e69e647556f8d6304c2d81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2baf543f5aa1d1cae7c9cdb6d59f890033f24b0b0e69e647556f8d6304c2d81", kill_on_drop: false }`
[INFO] [stdout] f2baf543f5aa1d1cae7c9cdb6d59f890033f24b0b0e69e647556f8d6304c2d81