[INFO] fetching crate slog-extlog 8.1.0...
[INFO] checking slog-extlog-8.1.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate slog-extlog 8.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate slog-extlog 8.1.0 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] removed /workspace/builds/worker-4-tc2/source/.cargo/config
[INFO] started tweaking crates.io crate slog-extlog 8.1.0
[INFO] finished tweaking crates.io crate slog-extlog 8.1.0
[INFO] tweaked toml for crates.io crate slog-extlog 8.1.0 written to /workspace/builds/worker-4-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 43 packages to latest compatible versions
[INFO] [stderr]       Adding erased-serde v0.3.31 (available: v0.4.5)
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e6310ad7cdb9ae4c5a819fdbca04b0751ef09c6c3e50770273b2d6a2d33beff7
[INFO] running `Command { std: "docker" "start" "-a" "e6310ad7cdb9ae4c5a819fdbca04b0751ef09c6c3e50770273b2d6a2d33beff7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6310ad7cdb9ae4c5a819fdbca04b0751ef09c6c3e50770273b2d6a2d33beff7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6310ad7cdb9ae4c5a819fdbca04b0751ef09c6c3e50770273b2d6a2d33beff7", kill_on_drop: false }`
[INFO] [stdout] e6310ad7cdb9ae4c5a819fdbca04b0751ef09c6c3e50770273b2d6a2d33beff7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 6fb3c96a4a21b074c6278a7f92c64f93f912a01f7942c6dce15edc7b2b3de14b
[INFO] running `Command { std: "docker" "start" "-a" "6fb3c96a4a21b074c6278a7f92c64f93f912a01f7942c6dce15edc7b2b3de14b", kill_on_drop: false }`
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking time v0.3.36
[INFO] [stderr]     Checking iobuffer v0.2.0
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]     Checking tokio v1.40.0
[INFO] [stderr]     Checking serde v1.0.210
[INFO] [stderr]    Compiling erased-serde v0.3.31
[INFO] [stderr]     Checking serde_json v1.0.128
[INFO] [stderr]     Checking slog-json v2.6.1
[INFO] [stderr]    Compiling slog-extlog-derive v8.1.0
[INFO] [stderr]     Checking slog-extlog v8.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `FooDecrLog` is never constructed
[INFO] [stdout]   --> benches/stats.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct FooDecrLog {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CumulBucketCounterLog` is never constructed
[INFO] [stdout]    --> tests/stats_query.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | struct CumulBucketCounterLog {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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 21.59s
[INFO] running `Command { std: "docker" "inspect" "6fb3c96a4a21b074c6278a7f92c64f93f912a01f7942c6dce15edc7b2b3de14b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fb3c96a4a21b074c6278a7f92c64f93f912a01f7942c6dce15edc7b2b3de14b", kill_on_drop: false }`
[INFO] [stdout] 6fb3c96a4a21b074c6278a7f92c64f93f912a01f7942c6dce15edc7b2b3de14b