[INFO] fetching crate dcc-rs 0.3.0...
[INFO] checking dcc-rs-0.3.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate dcc-rs 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate dcc-rs 0.3.0
[INFO] finished tweaking crates.io crate dcc-rs 0.3.0
[INFO] tweaked toml for crates.io crate dcc-rs 0.3.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dcc-rs 0.3.0 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 22 packages to latest compatible versions
[INFO] [stderr]       Adding defmt v0.3.100 (available: v1.0.1)
[INFO] [stderr]       Adding embedded-hal v0.2.7 (available: v1.0.0)
[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] 3488b092034c82afcb1a0eb38206a1ea039e1449029b231f8a2e6f7605ae96c7
[INFO] running `Command { std: "docker" "start" "-a" "3488b092034c82afcb1a0eb38206a1ea039e1449029b231f8a2e6f7605ae96c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3488b092034c82afcb1a0eb38206a1ea039e1449029b231f8a2e6f7605ae96c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3488b092034c82afcb1a0eb38206a1ea039e1449029b231f8a2e6f7605ae96c7", kill_on_drop: false }`
[INFO] [stdout] 3488b092034c82afcb1a0eb38206a1ea039e1449029b231f8a2e6f7605ae96c7
[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] d28c74d2fb079570227308cedbc47d2e34039b51a80c2e9413052d347f9d0cb5
[INFO] running `Command { std: "docker" "start" "-a" "d28c74d2fb079570227308cedbc47d2e34039b51a80c2e9413052d347f9d0cb5", kill_on_drop: false }`
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]     Checking dcc-rs v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `extended::*`
[INFO] [stdout]   --> src/packets/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use extended::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `extended::*`
[INFO] [stdout]   --> src/packets/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use extended::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Preamble` is never constructed
[INFO] [stdout]   --> src/packets/mod.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Preamble(BitArr!(for 14, in u8, Msb0));
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Preamble` is never constructed
[INFO] [stdout]   --> src/packets/mod.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Preamble(BitArr!(for 14, in u8, Msb0));
[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: std::result::Result<bool, Infallible>
[INFO] [stdout]    --> src/lib.rs:195:60
[INFO] [stdout]     |
[INFO] [stdout] 195 |           fn is_set_high(&self) -> Result<bool, Self::Error> {
[INFO] [stdout]     |  ____________________________________________________________^
[INFO] [stdout] 196 | |             Ok(self.state)
[INFO] [stdout] 197 | |         }
[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: std::result::Result<bool, Infallible>
[INFO] [stdout]    --> src/lib.rs:196:13
[INFO] [stdout]     |
[INFO] [stdout] 196 |             Ok(self.state)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<bool, Infallible>
[INFO] [stdout]    --> src/lib.rs:200:59
[INFO] [stdout]     |
[INFO] [stdout] 200 |           fn is_set_low(&self) -> Result<bool, Self::Error> {
[INFO] [stdout]     |  ___________________________________________________________^
[INFO] [stdout] 201 | |             Ok(!self.state)
[INFO] [stdout] 202 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<bool, Infallible>
[INFO] [stdout]    --> src/lib.rs:201:13
[INFO] [stdout]     |
[INFO] [stdout] 201 |             Ok(!self.state)
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<bool, Infallible>
[INFO] [stdout]    --> src/lib.rs:208:17
[INFO] [stdout]     |
[INFO] [stdout] 208 |         assert!(pin.is_set_low().unwrap());
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<bool, Infallible>
[INFO] [stdout]    --> src/lib.rs:210:17
[INFO] [stdout]     |
[INFO] [stdout] 210 |         assert!(pin.is_set_high().unwrap());
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<bool, Infallible>
[INFO] [stdout]    --> src/lib.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |         assert!(pin.is_set_low().unwrap());
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u32, Infallible>
[INFO] [stdout]    --> src/lib.rs:226:29
[INFO] [stdout]     |
[INFO] [stdout] 226 |             let new_delay = dcc.tick().unwrap();
[INFO] [stdout]     |                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u32, Infallible>
[INFO] [stdout]    --> src/lib.rs:235:29
[INFO] [stdout]     |
[INFO] [stdout] 235 |             let new_delay = dcc.tick().unwrap();
[INFO] [stdout]     |                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u32, Infallible>
[INFO] [stdout]    --> src/lib.rs:242:29
[INFO] [stdout]     |
[INFO] [stdout] 242 |             let new_delay = dcc.tick().unwrap();
[INFO] [stdout]     |                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<u32, Infallible>
[INFO] [stdout]    --> src/lib.rs:249:29
[INFO] [stdout]     |
[INFO] [stdout] 249 |             let new_delay = dcc.tick().unwrap();
[INFO] [stdout]     |                             ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dcc-rs` (lib test) due to 11 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d28c74d2fb079570227308cedbc47d2e34039b51a80c2e9413052d347f9d0cb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d28c74d2fb079570227308cedbc47d2e34039b51a80c2e9413052d347f9d0cb5", kill_on_drop: false }`
[INFO] [stdout] d28c74d2fb079570227308cedbc47d2e34039b51a80c2e9413052d347f9d0cb5