[INFO] fetching crate dogear 0.5.0...
[INFO] checking dogear-0.5.0 against try#24cd45d7714ba43afd4b8e62fb677b069b21c4a5 for pr-129543
[INFO] extracting crate dogear 0.5.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate dogear 0.5.0 on toolchain 24cd45d7714ba43afd4b8e62fb677b069b21c4a5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "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-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 29 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.5.13 (latest: v0.11.5)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.4.0)
[INFO] [stderr]       Adding humantime v1.3.0 (latest: v2.1.0)
[INFO] [stderr]       Adding quick-error v1.2.3 (latest: v2.0.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3304a036e6d915706c4c8b4273d76d1fb6fb15e14e7b4efed45ad29f191e3687
[INFO] running `Command { std: "docker" "start" "-a" "3304a036e6d915706c4c8b4273d76d1fb6fb15e14e7b4efed45ad29f191e3687", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3304a036e6d915706c4c8b4273d76d1fb6fb15e14e7b4efed45ad29f191e3687", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3304a036e6d915706c4c8b4273d76d1fb6fb15e14e7b4efed45ad29f191e3687", kill_on_drop: false }`
[INFO] [stdout] 3304a036e6d915706c4c8b4273d76d1fb6fb15e14e7b4efed45ad29f191e3687
[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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7922c3cb2d76a8249320d50082216595e47d5bf101c4ed6318c259237a93aafc
[INFO] running `Command { std: "docker" "start" "-a" "7922c3cb2d76a8249320d50082216595e47d5bf101c4ed6318c259237a93aafc", kill_on_drop: false }`
[INFO] [stderr]     Checking smallbitvec v2.5.3
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking humantime v1.3.0
[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] [stderr]     Checking regex v1.10.6
[INFO] [stderr]     Checking env_logger v0.5.13
[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 4.69s
[INFO] running `Command { std: "docker" "inspect" "7922c3cb2d76a8249320d50082216595e47d5bf101c4ed6318c259237a93aafc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7922c3cb2d76a8249320d50082216595e47d5bf101c4ed6318c259237a93aafc", kill_on_drop: false }`
[INFO] [stdout] 7922c3cb2d76a8249320d50082216595e47d5bf101c4ed6318c259237a93aafc