[INFO] fetching crate io-uring-op-connect 0.0.1...
[INFO] checking io-uring-op-connect-0.0.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate io-uring-op-connect 0.0.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate io-uring-op-connect 0.0.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate io-uring-op-connect 0.0.1
[INFO] tweaked toml for crates.io crate io-uring-op-connect 0.0.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate io-uring-op-connect 0.0.1 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] crate crates.io crate io-uring-op-connect 0.0.1 already has a lockfile, it will not be regenerated
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8967107e84e00bae88a64609c5b5f8b7a207664de740a7358f556a0e45f3e6fc
[INFO] running `Command { std: "docker" "start" "-a" "8967107e84e00bae88a64609c5b5f8b7a207664de740a7358f556a0e45f3e6fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8967107e84e00bae88a64609c5b5f8b7a207664de740a7358f556a0e45f3e6fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8967107e84e00bae88a64609c5b5f8b7a207664de740a7358f556a0e45f3e6fc", kill_on_drop: false }`
[INFO] [stdout] 8967107e84e00bae88a64609c5b5f8b7a207664de740a7358f556a0e45f3e6fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b540757ef520fe43b9f813f1a9460c0d9dd0eae6e32cff0664f20ff3fe235fac
[INFO] running `Command { std: "docker" "start" "-a" "b540757ef520fe43b9f813f1a9460c0d9dd0eae6e32cff0664f20ff3fe235fac", kill_on_drop: false }`
[INFO] [stderr]    Compiling io-uring v0.7.4
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking slabbable v0.1.0
[INFO] [stderr]     Checking ysockaddr v0.2.0
[INFO] [stderr]     Checking io-uring-owner v0.2.0-pre1
[INFO] [stderr]     Checking io-uring-fd v0.2.0-pre1
[INFO] [stderr]     Checking capacity v0.1.2
[INFO] [stderr]     Checking hashbrown v0.15.2
[INFO] [stderr]     Checking slabbable-hash v0.1.0
[INFO] [stderr]     Checking io-uring-opcode v0.2.0-pre3
[INFO] [stderr]     Checking slabbable-impl-selector v0.1.0
[INFO] [stderr]     Checking io-uring-bearer v0.2.0-pre3
[INFO] [stderr]     Checking io-uring-op-connect v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<connect::Connect, ConnectError>
[INFO] [stdout]   --> src/connect.rs:25:94
[INFO] [stdout]    |
[INFO] [stdout] 25 |       pub fn with_ysockaddr_c(fixed_fd: u32, ysaddr: YSockAddrC) -> Result<Self, ConnectError> {
[INFO] [stdout]    |  ______________________________________________________________________________________________^
[INFO] [stdout] 26 | |         Ok(Connect {
[INFO] [stdout] 27 | |             owner: Owner::Created,
[INFO] [stdout] 28 | |             fixed_fd,
[INFO] [stdout] 29 | |             ysaddr,
[INFO] [stdout] 30 | |         })
[INFO] [stdout] 31 | |     }
[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<connect::Connect, ConnectError>
[INFO] [stdout]   --> src/connect.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | /         Ok(Connect {
[INFO] [stdout] 27 | |             owner: Owner::Created,
[INFO] [stdout] 28 | |             fixed_fd,
[INFO] [stdout] 29 | |             ysaddr,
[INFO] [stdout] 30 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<connect::Connect, OpError>
[INFO] [stdout]   --> src/connect.rs:53:53
[INFO] [stdout]    |
[INFO] [stdout] 53 |       fn submission(self) -> Result<Connect, OpError> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 54 | |         Ok(self)
[INFO] [stdout] 55 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<connect::Connect, OpError>
[INFO] [stdout]   --> src/connect.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         Ok(self)
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `io-uring-op-connect` (lib test) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<connect::Connect, ConnectError>
[INFO] [stdout]   --> src/connect.rs:25:94
[INFO] [stdout]    |
[INFO] [stdout] 25 |       pub fn with_ysockaddr_c(fixed_fd: u32, ysaddr: YSockAddrC) -> Result<Self, ConnectError> {
[INFO] [stdout]    |  ______________________________________________________________________________________________^
[INFO] [stdout] 26 | |         Ok(Connect {
[INFO] [stdout] 27 | |             owner: Owner::Created,
[INFO] [stdout] 28 | |             fixed_fd,
[INFO] [stdout] 29 | |             ysaddr,
[INFO] [stdout] 30 | |         })
[INFO] [stdout] 31 | |     }
[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<connect::Connect, ConnectError>
[INFO] [stdout]   --> src/connect.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | /         Ok(Connect {
[INFO] [stdout] 27 | |             owner: Owner::Created,
[INFO] [stdout] 28 | |             fixed_fd,
[INFO] [stdout] 29 | |             ysaddr,
[INFO] [stdout] 30 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<connect::Connect, OpError>
[INFO] [stdout]   --> src/connect.rs:53:53
[INFO] [stdout]    |
[INFO] [stdout] 53 |       fn submission(self) -> Result<Connect, OpError> {
[INFO] [stdout]    |  _____________________________________________________^
[INFO] [stdout] 54 | |         Ok(self)
[INFO] [stdout] 55 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<connect::Connect, OpError>
[INFO] [stdout]   --> src/connect.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         Ok(self)
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `io-uring-op-connect` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "b540757ef520fe43b9f813f1a9460c0d9dd0eae6e32cff0664f20ff3fe235fac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b540757ef520fe43b9f813f1a9460c0d9dd0eae6e32cff0664f20ff3fe235fac", kill_on_drop: false }`
[INFO] [stdout] b540757ef520fe43b9f813f1a9460c0d9dd0eae6e32cff0664f20ff3fe235fac