[INFO] fetching crate refptr 0.2.0...
[INFO] checking refptr-0.2.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate refptr 0.2.0 into /workspace/builds/worker-42/source
[INFO] validating manifest of crates.io crate refptr 0.2.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate refptr 0.2.0
[INFO] finished tweaking crates.io crate refptr 0.2.0
[INFO] tweaked toml for crates.io crate refptr 0.2.0 written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded refptr-macros v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e753eaf3b0de40619bff83eb92b9898b2a5043b13b0f6c60d9c5cfdb638e3ef1
[INFO] running `Command { std: "docker" "start" "-a" "e753eaf3b0de40619bff83eb92b9898b2a5043b13b0f6c60d9c5cfdb638e3ef1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e753eaf3b0de40619bff83eb92b9898b2a5043b13b0f6c60d9c5cfdb638e3ef1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e753eaf3b0de40619bff83eb92b9898b2a5043b13b0f6c60d9c5cfdb638e3ef1", kill_on_drop: false }`
[INFO] [stdout] e753eaf3b0de40619bff83eb92b9898b2a5043b13b0f6c60d9c5cfdb638e3ef1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8046f81dc6b67e8349248b1098e398beabfccddeb5134889c3d95f6ab584c22e
[INFO] running `Command { std: "docker" "start" "-a" "8046f81dc6b67e8349248b1098e398beabfccddeb5134889c3d95f6ab584c22e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling refptr-macros v0.2.0
[INFO] [stderr]     Checking refptr v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.49s
[INFO] [stdout] warning: field is never read: `aaa`
[INFO] [stdout]  --> tests/testy.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     aaa: i32,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bbb`
[INFO] [stdout]  --> tests/testy.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     bbb: u32,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `aaa`
[INFO] [stdout]   --> tests/testy.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     aaa: i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bbb`
[INFO] [stdout]   --> tests/testy.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     bbb: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `aaa`
[INFO] [stdout]   --> tests/testy.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     aaa: i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bbb`
[INFO] [stdout]   --> tests/testy.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     bbb: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `aaa`
[INFO] [stdout]   --> tests/testy.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     aaa: i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bbb`
[INFO] [stdout]   --> tests/testy.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     bbb: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8046f81dc6b67e8349248b1098e398beabfccddeb5134889c3d95f6ab584c22e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8046f81dc6b67e8349248b1098e398beabfccddeb5134889c3d95f6ab584c22e", kill_on_drop: false }`
[INFO] [stdout] 8046f81dc6b67e8349248b1098e398beabfccddeb5134889c3d95f6ab584c22e