[INFO] fetching crate packed_struct 0.6.0...
[INFO] checking packed_struct-0.6.0 against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] extracting crate packed_struct 0.6.0 into /workspace/builds/worker-80/source
[INFO] validating manifest of crates.io crate packed_struct 0.6.0 on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate packed_struct 0.6.0
[INFO] finished tweaking crates.io crate packed_struct 0.6.0
[INFO] tweaked toml for crates.io crate packed_struct 0.6.0 written to /workspace/builds/worker-80/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8dbaf4edea4f3c8566c45eb901532dfdbcc59ce7547a074b6cbb33f3d2acb0d1
[INFO] running `Command { std: "docker" "start" "-a" "8dbaf4edea4f3c8566c45eb901532dfdbcc59ce7547a074b6cbb33f3d2acb0d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8dbaf4edea4f3c8566c45eb901532dfdbcc59ce7547a074b6cbb33f3d2acb0d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dbaf4edea4f3c8566c45eb901532dfdbcc59ce7547a074b6cbb33f3d2acb0d1", kill_on_drop: false }`
[INFO] [stdout] 8dbaf4edea4f3c8566c45eb901532dfdbcc59ce7547a074b6cbb33f3d2acb0d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba4557c5575c998a27e2491d103f0273496fb1b9e93181e2a6da8d8a0ff59647
[INFO] running `Command { std: "docker" "start" "-a" "ba4557c5575c998a27e2491d103f0273496fb1b9e93181e2a6da8d8a0ff59647", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling serde v1.0.128
[INFO] [stderr]    Compiling packed_struct v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling packed_struct_codegen v0.6.0
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/types_generic.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         &mut output[..].copy_from_slice(&packed.as_bytes_slice());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let _ = &mut output[..].copy_from_slice(&packed.as_bytes_slice());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/types_generic.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         &mut output[..].copy_from_slice(&packed.as_bytes_slice());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let _ = &mut output[..].copy_from_slice(&packed.as_bytes_slice());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.45s
[INFO] running `Command { std: "docker" "inspect" "ba4557c5575c998a27e2491d103f0273496fb1b9e93181e2a6da8d8a0ff59647", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba4557c5575c998a27e2491d103f0273496fb1b9e93181e2a6da8d8a0ff59647", kill_on_drop: false }`
[INFO] [stdout] ba4557c5575c998a27e2491d103f0273496fb1b9e93181e2a6da8d8a0ff59647