[INFO] cloning repository https://github.com/kyle-leonhard/niche
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kyle-leonhard/niche" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyle-leonhard%2Fniche", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyle-leonhard%2Fniche'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 478a896422e0b3db2288038a7f77b7d798208182
[INFO] checking kyle-leonhard/niche against try#94e848735e78b58442e0b82e9c60f8f430840389 for pr-149218
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyle-leonhard%2Fniche" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kyle-leonhard/niche
[INFO] finished tweaking git repo https://github.com/kyle-leonhard/niche
[INFO] tweaked toml for git repo https://github.com/kyle-leonhard/niche written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kyle-leonhard/niche on toolchain 94e848735e78b58442e0b82e9c60f8f430840389
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94e848735e78b58442e0b82e9c60f8f430840389" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kyle-leonhard/niche already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94e848735e78b58442e0b82e9c60f8f430840389" "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-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+94e848735e78b58442e0b82e9c60f8f430840389" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 618e01ee536e95a8f894e2618e854ee8b08f55bc573b4522adb967b9e27f3709
[INFO] running `Command { std: "docker" "start" "-a" "618e01ee536e95a8f894e2618e854ee8b08f55bc573b4522adb967b9e27f3709", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "618e01ee536e95a8f894e2618e854ee8b08f55bc573b4522adb967b9e27f3709", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "618e01ee536e95a8f894e2618e854ee8b08f55bc573b4522adb967b9e27f3709", kill_on_drop: false }`
[INFO] [stdout] 618e01ee536e95a8f894e2618e854ee8b08f55bc573b4522adb967b9e27f3709
[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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+94e848735e78b58442e0b82e9c60f8f430840389" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 051fc2e64597842a41c1d5078ae96939b47329df45cb655152dea87ce7a087fd
[INFO] running `Command { std: "docker" "start" "-a" "051fc2e64597842a41c1d5078ae96939b47329df45cb655152dea87ce7a087fd", kill_on_drop: false }`
[INFO] [stderr]     Checking niche v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:33:7
[INFO] [stdout]    |
[INFO] [stdout] 33 |     A(u32),
[INFO] [stdout]    |     - ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 33 -     A(u32),
[INFO] [stdout] 33 +     A(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 34 |     B(u32),
[INFO] [stdout]    |     - ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 34 -     B(u32),
[INFO] [stdout] 34 +     B(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:39:7
[INFO] [stdout]    |
[INFO] [stdout] 39 |     C(u32),
[INFO] [stdout]    |     - ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Outer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 39 -     C(u32),
[INFO] [stdout] 39 +     C(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:40:7
[INFO] [stdout]    |
[INFO] [stdout] 40 |     D(Inner),
[INFO] [stdout]    |     - ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Outer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 40 -     D(Inner),
[INFO] [stdout] 40 +     D(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:46:7
[INFO] [stdout]    |
[INFO] [stdout] 46 |     F(Outer),
[INFO] [stdout]    |     - ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `OuterOuter` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 46 -     F(Outer),
[INFO] [stdout] 46 +     F(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `E` is never constructed
[INFO] [stdout]   --> src/main.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | enum OuterOuter {
[INFO] [stdout]    |      ---------- variant in this enum
[INFO] [stdout] 45 |     E(u32),
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `OuterOuter` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:33:7
[INFO] [stdout]    |
[INFO] [stdout] 33 |     A(u32),
[INFO] [stdout]    |     - ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 33 -     A(u32),
[INFO] [stdout] 33 +     A(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 34 |     B(u32),
[INFO] [stdout]    |     - ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 34 -     B(u32),
[INFO] [stdout] 34 +     B(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:39:7
[INFO] [stdout]    |
[INFO] [stdout] 39 |     C(u32),
[INFO] [stdout]    |     - ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Outer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 39 -     C(u32),
[INFO] [stdout] 39 +     C(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:40:7
[INFO] [stdout]    |
[INFO] [stdout] 40 |     D(Inner),
[INFO] [stdout]    |     - ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Outer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 40 -     D(Inner),
[INFO] [stdout] 40 +     D(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:46:7
[INFO] [stdout]    |
[INFO] [stdout] 46 |     F(Outer),
[INFO] [stdout]    |     - ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `OuterOuter` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 46 -     F(Outer),
[INFO] [stdout] 46 +     F(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `E` is never constructed
[INFO] [stdout]   --> src/main.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | enum OuterOuter {
[INFO] [stdout]    |      ---------- variant in this enum
[INFO] [stdout] 45 |     E(u32),
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `OuterOuter` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "051fc2e64597842a41c1d5078ae96939b47329df45cb655152dea87ce7a087fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "051fc2e64597842a41c1d5078ae96939b47329df45cb655152dea87ce7a087fd", kill_on_drop: false }`
[INFO] [stdout] 051fc2e64597842a41c1d5078ae96939b47329df45cb655152dea87ce7a087fd
