[INFO] fetching crate tracing-appender 0.1.2...
[INFO] checking tracing-appender-0.1.2 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate tracing-appender 0.1.2 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate tracing-appender 0.1.2 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tracing-appender 0.1.2
[INFO] finished tweaking crates.io crate tracing-appender 0.1.2
[INFO] tweaked toml for crates.io crate tracing-appender 0.1.2 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 57f8300cded5fe93d8aee448d067af1c6d6a09720d9ca7a26cd40ade16b6d9ba
[INFO] running `Command { std: "docker" "start" "-a" "57f8300cded5fe93d8aee448d067af1c6d6a09720d9ca7a26cd40ade16b6d9ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57f8300cded5fe93d8aee448d067af1c6d6a09720d9ca7a26cd40ade16b6d9ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57f8300cded5fe93d8aee448d067af1c6d6a09720d9ca7a26cd40ade16b6d9ba", kill_on_drop: false }`
[INFO] [stdout] 57f8300cded5fe93d8aee448d067af1c6d6a09720d9ca7a26cd40ade16b6d9ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c4edb3e2218c4697f5a36b7063308f031d21f2aae4ad3b8273d45e172f1061a
[INFO] running `Command { std: "docker" "start" "-a" "0c4edb3e2218c4697f5a36b7063308f031d21f2aae4ad3b8273d45e172f1061a", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking sharded-slab v0.1.3
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking tracing-subscriber v0.2.24
[INFO] [stderr]     Checking tracing-appender v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `guard`
[INFO] [stdout]    --> src/non_blocking.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     guard: Option<JoinHandle<()>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:147:5
[INFO] [stdout]     |
[INFO] [stdout] 147 |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[warn(dead_code)]` implied by `#[warn(unused)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `guard`
[INFO] [stdout]    --> src/non_blocking.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     guard: Option<JoinHandle<()>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:147:5
[INFO] [stdout]     |
[INFO] [stdout] 147 |     unused,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = note: `#[warn(dead_code)]` implied by `#[warn(unused)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.86s
[INFO] running `Command { std: "docker" "inspect" "0c4edb3e2218c4697f5a36b7063308f031d21f2aae4ad3b8273d45e172f1061a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c4edb3e2218c4697f5a36b7063308f031d21f2aae4ad3b8273d45e172f1061a", kill_on_drop: false }`
[INFO] [stdout] 0c4edb3e2218c4697f5a36b7063308f031d21f2aae4ad3b8273d45e172f1061a