[INFO] fetching crate lzs 0.1.1...
[INFO] checking lzs-0.1.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate lzs 0.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate lzs 0.1.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate lzs 0.1.1
[INFO] tweaked toml for crates.io crate lzs 0.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate lzs 0.1.1 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 lzs 0.1.1 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] 79b14717fa5fa5c454d80eddf1e98b9959521f3c687277db5549667d9b53c3ba
[INFO] running `Command { std: "docker" "start" "-a" "79b14717fa5fa5c454d80eddf1e98b9959521f3c687277db5549667d9b53c3ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79b14717fa5fa5c454d80eddf1e98b9959521f3c687277db5549667d9b53c3ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79b14717fa5fa5c454d80eddf1e98b9959521f3c687277db5549667d9b53c3ba", kill_on_drop: false }`
[INFO] [stdout] 79b14717fa5fa5c454d80eddf1e98b9959521f3c687277db5549667d9b53c3ba
[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] be1532a0f10a3401f17d8561a09712eb5953edc46dc58420bbeee3307d8f7a2c
[INFO] running `Command { std: "docker" "start" "-a" "be1532a0f10a3401f17d8561a09712eb5953edc46dc58420bbeee3307d8f7a2c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking plotters-backend v0.3.7
[INFO] [stderr]     Checking itoa v1.0.15
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking anstyle v1.0.2
[INFO] [stderr]     Checking ryu v1.0.20
[INFO] [stderr]     Checking half v2.2.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]     Checking clap_lex v0.5.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking once_cell v1.20.3
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking oorandom v11.1.5
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking clap_builder v4.3.24
[INFO] [stderr]     Checking lzs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking plotters-svg v0.3.7
[INFO] [stdout] error: this type will no longer be must used: Result<Option<u8>, Void>
[INFO] [stdout]   --> src/slice_safe.rs:32:59
[INFO] [stdout]    |
[INFO] [stdout] 32 |       fn read(&mut self) -> Result<Option<u8>, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________^
[INFO] [stdout] 33 | |         if let Some((&first, rest)) = self.data.split_first() {
[INFO] [stdout] 34 | |             self.data = rest;
[INFO] [stdout] 35 | |             Ok(Some(first))
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |     }
[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<Option<u8>, Void>
[INFO] [stdout]   --> src/slice_safe.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | /         if let Some((&first, rest)) = self.data.split_first() {
[INFO] [stdout] 34 | |             self.data = rest;
[INFO] [stdout] 35 | |             Ok(Some(first))
[INFO] [stdout] 36 | |         } else {
[INFO] [stdout] 37 | |             Ok(None)
[INFO] [stdout] 38 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<u8>, Void>
[INFO] [stdout]   --> src/slice_safe.rs:33:63
[INFO] [stdout]    |
[INFO] [stdout] 33 |           if let Some((&first, rest)) = self.data.split_first() {
[INFO] [stdout]    |  _______________________________________________________________^
[INFO] [stdout] 34 | |             self.data = rest;
[INFO] [stdout] 35 | |             Ok(Some(first))
[INFO] [stdout] 36 | |         } else {
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<u8>, Void>
[INFO] [stdout]   --> src/slice_safe.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Ok(Some(first))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<u8>, Void>
[INFO] [stdout]   --> src/slice_safe.rs:36:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |           } else {
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 37 | |             Ok(None)
[INFO] [stdout] 38 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<u8>, Void>
[INFO] [stdout]   --> src/slice_safe.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |             Ok(None)
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Void>
[INFO] [stdout]   --> src/vec.rs:37:58
[INFO] [stdout]    |
[INFO] [stdout] 37 |       fn finish(self) -> Result<Self::Output, Self::Error> {
[INFO] [stdout]    |  __________________________________________________________^
[INFO] [stdout] 38 | |         Ok(self.0)
[INFO] [stdout] 39 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<u8>, Void>
[INFO] [stdout]   --> src/vec.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Ok(self.0)
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lzs` (lib) due to 8 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "be1532a0f10a3401f17d8561a09712eb5953edc46dc58420bbeee3307d8f7a2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be1532a0f10a3401f17d8561a09712eb5953edc46dc58420bbeee3307d8f7a2c", kill_on_drop: false }`
[INFO] [stdout] be1532a0f10a3401f17d8561a09712eb5953edc46dc58420bbeee3307d8f7a2c
