[INFO] fetching crate devault 0.2.0...
[INFO] checking devault-0.2.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate devault 0.2.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate devault 0.2.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate devault 0.2.0
[INFO] finished tweaking crates.io crate devault 0.2.0
[INFO] tweaked toml for crates.io crate devault 0.2.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 631a95732564c311cf5d6a44b13a22d56f973d1f2080f7287d31536e10498a4a
[INFO] running `Command { std: "docker" "start" "-a" "631a95732564c311cf5d6a44b13a22d56f973d1f2080f7287d31536e10498a4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "631a95732564c311cf5d6a44b13a22d56f973d1f2080f7287d31536e10498a4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "631a95732564c311cf5d6a44b13a22d56f973d1f2080f7287d31536e10498a4a", kill_on_drop: false }`
[INFO] [stdout] 631a95732564c311cf5d6a44b13a22d56f973d1f2080f7287d31536e10498a4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2c9b91b69aa28bdb99e98273d0e0adac74190c8ce86787460d23e2afe8efeb3
[INFO] running `Command { std: "docker" "start" "-a" "e2c9b91b69aa28bdb99e98273d0e0adac74190c8ce86787460d23e2afe8efeb3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking devault v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/test_struct.rs:13:16
[INFO] [stdout]    |
[INFO] [stdout] 13 |     struct Foo(u8);
[INFO] [stdout]    |            --- ^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Foo` 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: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> tests/test_struct.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 |     struct Bar(u8, f32, i64);
[INFO] [stdout]    |            --- ^^  ^^^  ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout]    = note: `Bar` has derived impls for the traits `Default` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `b` is never read
[INFO] [stdout]   --> tests/test_struct.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     struct Qux {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 26 |         a: u8,
[INFO] [stdout] 27 |         b: i64,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Qux` has derived impls for the traits `Default` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.87s
[INFO] running `Command { std: "docker" "inspect" "e2c9b91b69aa28bdb99e98273d0e0adac74190c8ce86787460d23e2afe8efeb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2c9b91b69aa28bdb99e98273d0e0adac74190c8ce86787460d23e2afe8efeb3", kill_on_drop: false }`
[INFO] [stdout] e2c9b91b69aa28bdb99e98273d0e0adac74190c8ce86787460d23e2afe8efeb3