[INFO] fetching crate buddy-system 0.2.0...
[INFO] checking buddy-system-0.2.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate buddy-system 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate buddy-system 0.2.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buddy-system 0.2.0
[INFO] finished tweaking crates.io crate buddy-system 0.2.0
[INFO] tweaked toml for crates.io crate buddy-system 0.2.0 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e1057703cf0a91e488603071fb1057011aed1d22f390e8c99e4fb1220ba8eaa
[INFO] running `Command { std: "docker" "start" "-a" "7e1057703cf0a91e488603071fb1057011aed1d22f390e8c99e4fb1220ba8eaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e1057703cf0a91e488603071fb1057011aed1d22f390e8c99e4fb1220ba8eaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e1057703cf0a91e488603071fb1057011aed1d22f390e8c99e4fb1220ba8eaa", kill_on_drop: false }`
[INFO] [stdout] 7e1057703cf0a91e488603071fb1057011aed1d22f390e8c99e4fb1220ba8eaa
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 061e40fdb7cef47d5d384cd8ec001c6a8ca9df5606eaad46c71199d483327c45
[INFO] running `Command { std: "docker" "start" "-a" "061e40fdb7cef47d5d384cd8ec001c6a8ca9df5606eaad46c71199d483327c45", kill_on_drop: false }`
[INFO] [stderr]     Checking generational-arena v0.2.9
[INFO] [stderr]     Checking buddy-system v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `pretty_print::prettify`
[INFO] [stdout]  --> src/arena.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pretty_print::prettify,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a1`
[INFO] [stdout]    --> src/arena.rs:173:9
[INFO] [stdout]     |
[INFO] [stdout] 173 |     let a1 = arena.alloc(64).unwrap();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a2`
[INFO] [stdout]    --> src/arena.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout] 174 |     let a2 = arena.alloc(24).unwrap();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a3`
[INFO] [stdout]    --> src/arena.rs:175:9
[INFO] [stdout]     |
[INFO] [stdout] 175 |     let a3 = arena.alloc(2).unwrap();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_a3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a4`
[INFO] [stdout]    --> src/arena.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 176 |     let a4 = arena.alloc(7).unwrap();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_a4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a5`
[INFO] [stdout]    --> src/arena.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |     let a5 = arena.alloc(31).unwrap();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_a5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a6`
[INFO] [stdout]    --> src/arena.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |     let a6 = arena.alloc(60).unwrap();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_a6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "061e40fdb7cef47d5d384cd8ec001c6a8ca9df5606eaad46c71199d483327c45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "061e40fdb7cef47d5d384cd8ec001c6a8ca9df5606eaad46c71199d483327c45", kill_on_drop: false }`
[INFO] [stdout] 061e40fdb7cef47d5d384cd8ec001c6a8ca9df5606eaad46c71199d483327c45