[INFO] fetching crate iou 0.3.3...
[INFO] checking iou-0.3.3 against try#2b41547e41f63ea0ca9cb25417ddd569b19e6a50 for pr-134273
[INFO] extracting crate iou 0.3.3 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate iou 0.3.3 on toolchain 2b41547e41f63ea0ca9cb25417ddd569b19e6a50
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 9 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.6.0)
[INFO] [stderr]       Adding nix v0.18.0 (available: v0.29.0)
[INFO] [stderr]       Adding semver v0.9.0 (available: v1.0.24)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uring-sys v0.7.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e47bfeae08f541ac0e2405602a805992245e2c6c75bf3d4ab1a302fca7ee3ae8
[INFO] running `Command { std: "docker" "start" "-a" "e47bfeae08f541ac0e2405602a805992245e2c6c75bf3d4ab1a302fca7ee3ae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e47bfeae08f541ac0e2405602a805992245e2c6c75bf3d4ab1a302fca7ee3ae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e47bfeae08f541ac0e2405602a805992245e2c6c75bf3d4ab1a302fca7ee3ae8", kill_on_drop: false }`
[INFO] [stdout] e47bfeae08f541ac0e2405602a805992245e2c6c75bf3d4ab1a302fca7ee3ae8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+2b41547e41f63ea0ca9cb25417ddd569b19e6a50" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0583857246eefb1fb356e49291f8e5f4f6a8488128dd2a150ef172ffbb61b9ac
[INFO] running `Command { std: "docker" "start" "-a" "0583857246eefb1fb356e49291f8e5f4f6a8488128dd2a150ef172ffbb61b9ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]    Compiling cc v1.2.7
[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 7.83s
[INFO] running `Command { std: "docker" "inspect" "0583857246eefb1fb356e49291f8e5f4f6a8488128dd2a150ef172ffbb61b9ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0583857246eefb1fb356e49291f8e5f4f6a8488128dd2a150ef172ffbb61b9ac", kill_on_drop: false }`
[INFO] [stdout] 0583857246eefb1fb356e49291f8e5f4f6a8488128dd2a150ef172ffbb61b9ac