[INFO] fetching crate packbytes 0.2.0...
[INFO] checking packbytes-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate packbytes 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate packbytes 0.2.0
[INFO] finished tweaking crates.io crate packbytes 0.2.0
[INFO] tweaked toml for crates.io crate packbytes 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate packbytes 0.2.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 234e8dfcdc2871bc3bb70905d97ec4a65637d84c6439ef0862dca79f08b7af1f
[INFO] running `Command { std: "docker" "start" "-a" "234e8dfcdc2871bc3bb70905d97ec4a65637d84c6439ef0862dca79f08b7af1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "234e8dfcdc2871bc3bb70905d97ec4a65637d84c6439ef0862dca79f08b7af1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "234e8dfcdc2871bc3bb70905d97ec4a65637d84c6439ef0862dca79f08b7af1f", kill_on_drop: false }`
[INFO] [stdout] 234e8dfcdc2871bc3bb70905d97ec4a65637d84c6439ef0862dca79f08b7af1f
[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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25510acac0322537acce32949725f70ac9f9ca95c67add10290cd7661c35426d
[INFO] running `Command { std: "docker" "start" "-a" "25510acac0322537acce32949725f70ac9f9ca95c67add10290cd7661c35426d", kill_on_drop: false }`
[INFO] [stderr]    Compiling packbytes-derive v0.1.0
[INFO] [stderr]     Checking packbytes v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `ComplexStruct` is never constructed
[INFO] [stdout]   --> tests/tests.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct ComplexStruct {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, u32>
[INFO] [stdout]   --> tests/tests.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 | #[derive(Debug, TryFromBytes, ToBytes, Eq, PartialEq)]
[INFO] [stdout]    |                 ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]   --> tests/tests.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 | #[derive(Debug, TryFromBytes, ToBytes, Eq, PartialEq)]
[INFO] [stdout]    |                 ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `TryFromBytes` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, u32>
[INFO] [stdout]   --> tests/tests.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 | #[derive(Debug, TryFromBytes, ToBytes, Eq, PartialEq)]
[INFO] [stdout]    |                 ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `packbytes` (test "tests") due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "25510acac0322537acce32949725f70ac9f9ca95c67add10290cd7661c35426d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25510acac0322537acce32949725f70ac9f9ca95c67add10290cd7661c35426d", kill_on_drop: false }`
[INFO] [stdout] 25510acac0322537acce32949725f70ac9f9ca95c67add10290cd7661c35426d