[INFO] fetching crate specs_declaration 0.3.0...
[INFO] checking specs_declaration-0.3.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate specs_declaration 0.3.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate specs_declaration 0.3.0
[INFO] finished tweaking crates.io crate specs_declaration 0.3.0
[INFO] tweaked toml for crates.io crate specs_declaration 0.3.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate specs_declaration 0.3.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 27 packages to latest compatible versions
[INFO] [stderr]       Adding specs v0.16.1 (available: v0.20.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22b8c6e420676e5ca01a8fca3194bbb6f51b2deb8805e398a7aa7835d469040c
[INFO] running `Command { std: "docker" "start" "-a" "22b8c6e420676e5ca01a8fca3194bbb6f51b2deb8805e398a7aa7835d469040c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22b8c6e420676e5ca01a8fca3194bbb6f51b2deb8805e398a7aa7835d469040c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22b8c6e420676e5ca01a8fca3194bbb6f51b2deb8805e398a7aa7835d469040c", kill_on_drop: false }`
[INFO] [stdout] 22b8c6e420676e5ca01a8fca3194bbb6f51b2deb8805e398a7aa7835d469040c
[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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 391bf6dc3598cd061019143e32418b57028f66cb3bc8d18d1e48f1babbedde9b
[INFO] running `Command { std: "docker" "start" "-a" "391bf6dc3598cd061019143e32418b57028f66cb3bc8d18d1e48f1babbedde9b", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.5
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking mopa v0.2.2
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking hibitset v0.6.4
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]     Checking shrev v1.1.3
[INFO] [stderr]     Checking tuple_utils v0.3.0
[INFO] [stderr]     Checking specs_declaration v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking tynm v0.1.10
[INFO] [stderr]     Checking shred v0.10.2
[INFO] [stderr]     Checking specs v0.16.1
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]   --> src/lib.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub struct Test {
[INFO] [stdout]    |                ---- field in this struct
[INFO] [stdout] 51 |         pub a: i32,
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Test` 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: struct `SystemName` is never constructed
[INFO] [stdout]   --> src/lib.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             SystemName,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `system` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SystemName` is never constructed
[INFO] [stdout]   --> src/lib.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |             SystemName<T: Send + Sync + 'static + Default, A>,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `system` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.60s
[INFO] running `Command { std: "docker" "inspect" "391bf6dc3598cd061019143e32418b57028f66cb3bc8d18d1e48f1babbedde9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "391bf6dc3598cd061019143e32418b57028f66cb3bc8d18d1e48f1babbedde9b", kill_on_drop: false }`
[INFO] [stdout] 391bf6dc3598cd061019143e32418b57028f66cb3bc8d18d1e48f1babbedde9b