[INFO] fetching crate serbzip-core 0.10.0...
[INFO] checking serbzip-core-0.10.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate serbzip-core 0.10.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate serbzip-core 0.10.0
[INFO] finished tweaking crates.io crate serbzip-core 0.10.0
[INFO] tweaked toml for crates.io crate serbzip-core 0.10.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serbzip-core 0.10.0 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 21 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[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] 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] 898a4051354d06e28bed7e9c70b0f99d891f83aaab9f9fc97d2d8e0beb06ce5f
[INFO] running `Command { std: "docker" "start" "-a" "898a4051354d06e28bed7e9c70b0f99d891f83aaab9f9fc97d2d8e0beb06ce5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "898a4051354d06e28bed7e9c70b0f99d891f83aaab9f9fc97d2d8e0beb06ce5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "898a4051354d06e28bed7e9c70b0f99d891f83aaab9f9fc97d2d8e0beb06ce5f", kill_on_drop: false }`
[INFO] [stdout] 898a4051354d06e28bed7e9c70b0f99d891f83aaab9f9fc97d2d8e0beb06ce5f
[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] 55fde0bb0accff8d2b49b919d75e47991fa6f6e6d34793da352d58d6f3382072
[INFO] running `Command { std: "docker" "start" "-a" "55fde0bb0accff8d2b49b919d75e47991fa6f6e6d34793da352d58d6f3382072", kill_on_drop: false }`
[INFO] [stderr]    Compiling virtue v0.0.18
[INFO] [stderr]     Checking unty v0.0.4
[INFO] [stderr]    Compiling bincode_derive v2.0.1
[INFO] [stderr]     Checking bincode v2.0.1
[INFO] [stderr]     Checking serbzip-core v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs.rs:45:51
[INFO] [stdout]    |
[INFO] [stdout] 45 |             transcoder::transcode(r, w, |_, line| Ok(self.compress_line(line)));
[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<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid.rs:26:76
[INFO] [stdout]    |
[INFO] [stdout] 26 |       fn expand_line(&self, line: &str) -> Result<String, Self::ExpandError> {
[INFO] [stdout]    |  ____________________________________________________________________________^
[INFO] [stdout] 27 | |         Ok(line
[INFO] [stdout] 28 | |             .split_whitespace()
[INFO] [stdout] 29 | |             .enumerate()
[INFO] [stdout] 30 | |             .map(|(pos, _)| if pos == 0 { "what" } else { " what" })
[INFO] [stdout] 31 | |             .fold(String::new(), String::add))
[INFO] [stdout] 32 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | /         Ok(line
[INFO] [stdout] 28 | |             .split_whitespace()
[INFO] [stdout] 29 | |             .enumerate()
[INFO] [stdout] 30 | |             .map(|(pos, _)| if pos == 0 { "what" } else { " what" })
[INFO] [stdout] 31 | |             .fold(String::new(), String::add))
[INFO] [stdout]    | |______________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serbzip-core` (lib) due to 3 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<String, Infallible>
[INFO] [stdout]   --> src/codecs.rs:45:51
[INFO] [stdout]    |
[INFO] [stdout] 45 |             transcoder::transcode(r, w, |_, line| Ok(self.compress_line(line)));
[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<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid.rs:26:76
[INFO] [stdout]    |
[INFO] [stdout] 26 |       fn expand_line(&self, line: &str) -> Result<String, Self::ExpandError> {
[INFO] [stdout]    |  ____________________________________________________________________________^
[INFO] [stdout] 27 | |         Ok(line
[INFO] [stdout] 28 | |             .split_whitespace()
[INFO] [stdout] 29 | |             .enumerate()
[INFO] [stdout] 30 | |             .map(|(pos, _)| if pos == 0 { "what" } else { " what" })
[INFO] [stdout] 31 | |             .fold(String::new(), String::add))
[INFO] [stdout] 32 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | /         Ok(line
[INFO] [stdout] 28 | |             .split_whitespace()
[INFO] [stdout] 29 | |             .enumerate()
[INFO] [stdout] 30 | |             .map(|(pos, _)| if pos == 0 { "what" } else { " what" })
[INFO] [stdout] 31 | |             .fold(String::new(), String::add))
[INFO] [stdout]    | |______________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid/tests.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         Ok(String::from("what what what")),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid/tests.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Armenoid::default().expand_line("inch inch inch")
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid/tests.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     assert_eq!(
[INFO] [stdout] 17 | |         Ok(String::from("what what what")),
[INFO] [stdout] 18 | |         Armenoid::default().expand_line("inch inch inch")
[INFO] [stdout] 19 | |     );
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (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: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid/tests.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     assert_eq!(
[INFO] [stdout] 17 | |         Ok(String::from("what what what")),
[INFO] [stdout] 18 | |         Armenoid::default().expand_line("inch inch inch")
[INFO] [stdout] 19 | |     );
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (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: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid/tests.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     assert_eq!(
[INFO] [stdout] 17 | |         Ok(String::from("what what what")),
[INFO] [stdout] 18 | |         Armenoid::default().expand_line("inch inch inch")
[INFO] [stdout] 19 | |     );
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (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: Result<String, Infallible>
[INFO] [stdout]   --> src/codecs/armenoid/tests.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     assert_eq!(
[INFO] [stdout] 17 | |         Ok(String::from("what what what")),
[INFO] [stdout] 18 | |         Armenoid::default().expand_line("inch inch inch")
[INFO] [stdout] 19 | |     );
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `assert_eq` (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: Result<String, Infallible>
[INFO] [stdout]    --> src/transcoder/tests.rs:100:78
[INFO] [stdout]     |
[INFO] [stdout] 100 |       let processor = |line_no: u32, line: &str| -> Result<String, Infallible> {
[INFO] [stdout]     |  ______________________________________________________________________________^
[INFO] [stdout] 101 | |         Ok(format!("{line_no}-{line}"))
[INFO] [stdout] 102 | |     };
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/transcoder/tests.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |         Ok(format!("{line_no}-{line}"))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/transcoder/tests.rs:137:78
[INFO] [stdout]     |
[INFO] [stdout] 137 |       let processor = |line_no: u32, line: &str| -> Result<String, Infallible> {
[INFO] [stdout]     |  ______________________________________________________________________________^
[INFO] [stdout] 138 | |         Ok(format!("{line_no}-{line}"))
[INFO] [stdout] 139 | |     };
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/transcoder/tests.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(format!("{line_no}-{line}"))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serbzip-core` (lib test) due to 13 previous errors
[INFO] running `Command { std: "docker" "inspect" "55fde0bb0accff8d2b49b919d75e47991fa6f6e6d34793da352d58d6f3382072", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55fde0bb0accff8d2b49b919d75e47991fa6f6e6d34793da352d58d6f3382072", kill_on_drop: false }`
[INFO] [stdout] 55fde0bb0accff8d2b49b919d75e47991fa6f6e6d34793da352d58d6f3382072
