[INFO] fetching crate pi_cancel_timer 0.2.0...
[INFO] checking pi_cancel_timer-0.2.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate pi_cancel_timer 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate pi_cancel_timer 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 pi_cancel_timer 0.2.0
[INFO] finished tweaking crates.io crate pi_cancel_timer 0.2.0
[INFO] tweaked toml for crates.io crate pi_cancel_timer 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 23 packages to latest compatible versions
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1)
[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] b7be5b92059a158f6d43f8ac9434a1efccecf187529b2875f814a0fd7bc78555
[INFO] running `Command { std: "docker" "start" "-a" "b7be5b92059a158f6d43f8ac9434a1efccecf187529b2875f814a0fd7bc78555", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7be5b92059a158f6d43f8ac9434a1efccecf187529b2875f814a0fd7bc78555", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7be5b92059a158f6d43f8ac9434a1efccecf187529b2875f814a0fd7bc78555", kill_on_drop: false }`
[INFO] [stdout] b7be5b92059a158f6d43f8ac9434a1efccecf187529b2875f814a0fd7bc78555
[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] 776fdf244496d14f2437f129d7c2286dd3b3681a79c1d78ef9f61f054cd73f4b
[INFO] running `Command { std: "docker" "start" "-a" "776fdf244496d14f2437f129d7c2286dd3b3681a79c1d78ef9f61f054cd73f4b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]     Checking pi_ext_heap v0.1.1
[INFO] [stderr]    Compiling slotmap v1.0.7
[INFO] [stderr]     Checking pi_slot_deque v0.2.1
[INFO] [stderr]     Checking pi_slot_wheel v0.2.0
[INFO] [stderr]     Checking pi_cancel_timer v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `loc`
[INFO] [stdout]   --> src/lib.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 let loc = self.heap.push(
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_loc`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking pcg_rand v0.13.0
[INFO] [stdout] warning: unused variable: `loc`
[INFO] [stdout]   --> src/lib.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 let loc = self.heap.push(
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_loc`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.58s
[INFO] running `Command { std: "docker" "inspect" "776fdf244496d14f2437f129d7c2286dd3b3681a79c1d78ef9f61f054cd73f4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "776fdf244496d14f2437f129d7c2286dd3b3681a79c1d78ef9f61f054cd73f4b", kill_on_drop: false }`
[INFO] [stdout] 776fdf244496d14f2437f129d7c2286dd3b3681a79c1d78ef9f61f054cd73f4b