[INFO] fetching crate cow_struct 0.0.1...
[INFO] checking cow_struct-0.0.1 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate cow_struct 0.0.1 into /workspace/builds/worker-19/source
[INFO] validating manifest of crates.io crate cow_struct 0.0.1 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cow_struct 0.0.1
[INFO] finished tweaking crates.io crate cow_struct 0.0.1
[INFO] tweaked toml for crates.io crate cow_struct 0.0.1 written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 063ddfb81a30ad4646364556d29eccc4c2120cd02317003951fcfed5cb3aeb26
[INFO] running `Command { std: "docker" "start" "-a" "063ddfb81a30ad4646364556d29eccc4c2120cd02317003951fcfed5cb3aeb26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "063ddfb81a30ad4646364556d29eccc4c2120cd02317003951fcfed5cb3aeb26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "063ddfb81a30ad4646364556d29eccc4c2120cd02317003951fcfed5cb3aeb26", kill_on_drop: false }`
[INFO] [stdout] 063ddfb81a30ad4646364556d29eccc4c2120cd02317003951fcfed5cb3aeb26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57b3ea254735eb46a94a6276a72525ee11c75be54a44c7aa1b57331aa341f8c1
[INFO] running `Command { std: "docker" "start" "-a" "57b3ea254735eb46a94a6276a72525ee11c75be54a44c7aa1b57331aa341f8c1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking cow_struct v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `f`
[INFO] [stdout]  --> tests/struct.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |         f: [u8; 16],
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.30s
[INFO] running `Command { std: "docker" "inspect" "57b3ea254735eb46a94a6276a72525ee11c75be54a44c7aa1b57331aa341f8c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57b3ea254735eb46a94a6276a72525ee11c75be54a44c7aa1b57331aa341f8c1", kill_on_drop: false }`
[INFO] [stdout] 57b3ea254735eb46a94a6276a72525ee11c75be54a44c7aa1b57331aa341f8c1