[INFO] fetching crate dogear 0.5.0...
[INFO] checking dogear-0.5.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate dogear 0.5.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate dogear 0.5.0 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 dogear 0.5.0
[INFO] finished tweaking crates.io crate dogear 0.5.0
[INFO] tweaked toml for crates.io crate dogear 0.5.0 written to /workspace/builds/worker-7-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 28 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.5.13 (available: v0.11.5)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (available: v0.4.0)
[INFO] [stderr]       Adding humantime v1.3.0 (available: v2.1.0)
[INFO] [stderr]       Adding quick-error v1.2.3 (available: v2.0.1)
[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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 882d5afdc3510237c55d18488629cdd80230c7e2a5c922dc000123071ddd63b8
[INFO] running `Command { std: "docker" "start" "-a" "882d5afdc3510237c55d18488629cdd80230c7e2a5c922dc000123071ddd63b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "882d5afdc3510237c55d18488629cdd80230c7e2a5c922dc000123071ddd63b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "882d5afdc3510237c55d18488629cdd80230c7e2a5c922dc000123071ddd63b8", kill_on_drop: false }`
[INFO] [stdout] 882d5afdc3510237c55d18488629cdd80230c7e2a5c922dc000123071ddd63b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 6a304432739c90130b35eb739553c86554a817b031b4703633b7c23b629d6ac0
[INFO] running `Command { std: "docker" "start" "-a" "6a304432739c90130b35eb739553c86554a817b031b4703633b7c23b629d6ac0", kill_on_drop: false }`
[INFO] [stderr]     Checking smallbitvec v2.5.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking dogear v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `merged_guids` is never read
[INFO] [stdout]     --> src/merge.rs:1763:5
[INFO] [stdout]      |
[INFO] [stdout] 1759 | pub struct MergedRoot<'t> {
[INFO] [stdout]      |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 1763 |     merged_guids: HashSet<Guid>,
[INFO] [stdout]      |     ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `MergedRoot` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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: field `merged_guids` is never read
[INFO] [stdout]     --> src/merge.rs:1763:5
[INFO] [stdout]      |
[INFO] [stdout] 1759 | pub struct MergedRoot<'t> {
[INFO] [stdout]      |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 1763 |     merged_guids: HashSet<Guid>,
[INFO] [stdout]      |     ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `MergedRoot` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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 0.95s
[INFO] running `Command { std: "docker" "inspect" "6a304432739c90130b35eb739553c86554a817b031b4703633b7c23b629d6ac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a304432739c90130b35eb739553c86554a817b031b4703633b7c23b629d6ac0", kill_on_drop: false }`
[INFO] [stdout] 6a304432739c90130b35eb739553c86554a817b031b4703633b7c23b629d6ac0