[INFO] fetching crate recvmsg 1.0.0...
[INFO] checking recvmsg-1.0.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate recvmsg 1.0.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate recvmsg 1.0.0
[INFO] finished tweaking crates.io crate recvmsg 1.0.0
[INFO] tweaked toml for crates.io crate recvmsg 1.0.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate recvmsg 1.0.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 33 packages to latest compatible versions
[INFO] [stderr]       Adding windows-sys v0.52.0 (available: v0.61.2)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 19d7c2654d72809257647208b765dcf1f6f67cb4032670250a98a40a7574ddd9
[INFO] running `Command { std: "docker" "start" "-a" "19d7c2654d72809257647208b765dcf1f6f67cb4032670250a98a40a7574ddd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19d7c2654d72809257647208b765dcf1f6f67cb4032670250a98a40a7574ddd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19d7c2654d72809257647208b765dcf1f6f67cb4032670250a98a40a7574ddd9", kill_on_drop: false }`
[INFO] [stdout] 19d7c2654d72809257647208b765dcf1f6f67cb4032670250a98a40a7574ddd9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] c9707561a085274aab8092115d078aebe685bbd2d14d235da102885f8a1a99ab
[INFO] running `Command { std: "docker" "start" "-a" "c9707561a085274aab8092115d078aebe685bbd2d14d235da102885f8a1a99ab", kill_on_drop: false }`
[INFO] [stderr]     Checking recvmsg v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr] error: could not compile `recvmsg` (lib) due to 9 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<Option<bool>, Infallible>
[INFO] [stdout]   --> src/empty.rs:40:44
[INFO] [stdout]    |
[INFO] [stdout] 40 |       ) -> Result<Option<bool>, Self::Error> {
[INFO] [stdout]    |  ____________________________________________^
[INFO] [stdout] 41 | |         Ok(None)
[INFO] [stdout] 42 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<Option<bool>, Infallible>
[INFO] [stdout]   --> src/empty.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Ok(None)
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<TryRecvResult, Infallible>
[INFO] [stdout]   --> src/empty.rs:50:45
[INFO] [stdout]    |
[INFO] [stdout] 50 |       ) -> Result<TryRecvResult, Self::Error> {
[INFO] [stdout]    |  _____________________________________________^
[INFO] [stdout] 51 | |         Ok(TryRecvResult::EndOfStream)
[INFO] [stdout] 52 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<TryRecvResult, Infallible>
[INFO] [stdout]   --> src/empty.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         Ok(TryRecvResult::EndOfStream)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<RecvResult, Infallible>
[INFO] [stdout]   --> src/empty.rs:62:42
[INFO] [stdout]    |
[INFO] [stdout] 62 |       ) -> Result<RecvResult, Self::Error> {
[INFO] [stdout]    |  __________________________________________^
[INFO] [stdout] 63 | |         Ok(RecvResult::EndOfStream)
[INFO] [stdout] 64 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<RecvResult, Infallible>
[INFO] [stdout]   --> src/empty.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         Ok(RecvResult::EndOfStream)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<bool>, Infallible>
[INFO] [stdout]   --> src/empty.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |         Ok(None).into()
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<TryRecvResult, Infallible>
[INFO] [stdout]   --> src/empty.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         Ok(TryRecvResult::EndOfStream).into()
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<RecvResult, Infallible>
[INFO] [stdout]    --> src/empty.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         Ok(RecvResult::EndOfStream).into()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c9707561a085274aab8092115d078aebe685bbd2d14d235da102885f8a1a99ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9707561a085274aab8092115d078aebe685bbd2d14d235da102885f8a1a99ab", kill_on_drop: false }`
[INFO] [stdout] c9707561a085274aab8092115d078aebe685bbd2d14d235da102885f8a1a99ab
