[INFO] fetching crate binartree 2.0.2...
[INFO] checking binartree-2.0.2 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate binartree 2.0.2 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate binartree 2.0.2 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate binartree 2.0.2
[INFO] finished tweaking crates.io crate binartree 2.0.2
[INFO] tweaked toml for crates.io crate binartree 2.0.2 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 285c4870705120c0354d1b2d18d6fbde0b8e3695c806a6d8a4e7aeeb3d8b0265
[INFO] running `Command { std: "docker" "start" "-a" "285c4870705120c0354d1b2d18d6fbde0b8e3695c806a6d8a4e7aeeb3d8b0265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "285c4870705120c0354d1b2d18d6fbde0b8e3695c806a6d8a4e7aeeb3d8b0265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "285c4870705120c0354d1b2d18d6fbde0b8e3695c806a6d8a4e7aeeb3d8b0265", kill_on_drop: false }`
[INFO] [stdout] 285c4870705120c0354d1b2d18d6fbde0b8e3695c806a6d8a4e7aeeb3d8b0265
[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 -Dtail_expr_drop_order" "-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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a23bde66d64447ea0adb2240b57a4bdbd8e09173046dc893cbd2de87beb8eff1
[INFO] running `Command { std: "docker" "start" "-a" "a23bde66d64447ea0adb2240b57a4bdbd8e09173046dc893cbd2de87beb8eff1", kill_on_drop: false }`
[INFO] [stderr]     Checking binartree v2.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/node.rs:206:5
[INFO] [stdout]     |
[INFO] [stdout] 206 |                 mem::drop(branch.key);
[INFO] [stdout]     |                 ^^^^^^^^^^----------^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `T`
[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] 206 -                 mem::drop(branch.key);
[INFO] [stdout] 206 +                 let _ = branch.key;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/node.rs:206:5
[INFO] [stdout]     |
[INFO] [stdout] 206 |                 mem::drop(branch.key);
[INFO] [stdout]     |                 ^^^^^^^^^^----------^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           argument has type `T`
[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] 206 -                 mem::drop(branch.key);
[INFO] [stdout] 206 +                 let _ = branch.key;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "a23bde66d64447ea0adb2240b57a4bdbd8e09173046dc893cbd2de87beb8eff1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a23bde66d64447ea0adb2240b57a4bdbd8e09173046dc893cbd2de87beb8eff1", kill_on_drop: false }`
[INFO] [stdout] a23bde66d64447ea0adb2240b57a4bdbd8e09173046dc893cbd2de87beb8eff1