[INFO] fetching crate rigs 0.0.8...
[INFO] checking rigs-0.0.8 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rigs 0.0.8 into /workspace/builds/worker-4-tc2/source
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate rigs 0.0.8
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate rigs 0.0.8
[INFO] tweaked toml for crates.io crate rigs 0.0.8 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rigs 0.0.8 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 rigs 0.0.8 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] [stderr]     Blocking waiting for file lock on package cache
[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] 95b44b5c688f042c15d0b92f791872f24a198861040c4ca3c839b3546fbe0c01
[INFO] running `Command { std: "docker" "start" "-a" "95b44b5c688f042c15d0b92f791872f24a198861040c4ca3c839b3546fbe0c01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95b44b5c688f042c15d0b92f791872f24a198861040c4ca3c839b3546fbe0c01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95b44b5c688f042c15d0b92f791872f24a198861040c4ca3c839b3546fbe0c01", kill_on_drop: false }`
[INFO] [stdout] 95b44b5c688f042c15d0b92f791872f24a198861040c4ca3c839b3546fbe0c01
[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] 0aa0981f136c9c8af21928c85e71f9edc17f5e6fa86ae4c4fe88569baac3f2ec
[INFO] running `Command { std: "docker" "start" "-a" "0aa0981f136c9c8af21928c85e71f9edc17f5e6fa86ae4c4fe88569baac3f2ec", kill_on_drop: false }`
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[INFO] [stderr]     Checking rigs v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `ExampleStructParameterToHaveADescription` is never constructed
[INFO] [stdout]    --> examples/tool.rs:125:8
[INFO] [stdout]     |
[INFO] [stdout] 125 | struct ExampleStructParameterToHaveADescription {
[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 `ThirdField` is never constructed
[INFO] [stdout]    --> examples/tool.rs:135:8
[INFO] [stdout]     |
[INFO] [stdout] 135 | struct ThirdField {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:74:50
[INFO] [stdout]    |
[INFO] [stdout] 74 |   fn sub(x: f64, y: f64) -> Result<f64, CalcError> {
[INFO] [stdout]    |  __________________________________________________^
[INFO] [stdout] 75 | |     tracing::info!("Sub tool is called");
[INFO] [stdout] 76 | |     Ok(x - y)
[INFO] [stdout] 77 | | }
[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<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Ok(x - y)
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | / #[tool(
[INFO] [stdout] 70 | |     description = "Subtract y from x (i.e.: x - y)",
[INFO] [stdout] 71 | |     arg(x, description = "The number to subtract from"),
[INFO] [stdout] 72 | |     arg(y, description = "The number to subtract")
[INFO] [stdout] 73 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | / #[tool(
[INFO] [stdout] 70 | |     description = "Subtract y from x (i.e.: x - y)",
[INFO] [stdout] 71 | |     arg(x, description = "The number to subtract from"),
[INFO] [stdout] 72 | |     arg(y, description = "The number to subtract")
[INFO] [stdout] 73 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the attribute macro `tool` (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<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:80:50
[INFO] [stdout]    |
[INFO] [stdout] 80 |   fn add(x: f64, y: f64) -> Result<f64, CalcError> {
[INFO] [stdout]    |  __________________________________________________^
[INFO] [stdout] 81 | |     tracing::info!("Add tool is called");
[INFO] [stdout] 82 | |     Ok(x + y)
[INFO] [stdout] 83 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 82 |     Ok(x + y)
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 | #[tool]
[INFO] [stdout]    | ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 | #[tool]
[INFO] [stdout]    | ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the attribute macro `tool` (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<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:86:50
[INFO] [stdout]    |
[INFO] [stdout] 86 |   fn mul(x: f64, y: f64) -> Result<f64, CalcError> {
[INFO] [stdout]    |  __________________________________________________^
[INFO] [stdout] 87 | |     tracing::info!("Mul tool is called");
[INFO] [stdout] 88 | |     Ok(x * y)
[INFO] [stdout] 89 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:88:5
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Ok(x * y)
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:85:1
[INFO] [stdout]    |
[INFO] [stdout] 85 | #[tool(name = "Multiply", description = "Multiply x and y (i.e.: x * y)")]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, CalcError>
[INFO] [stdout]   --> examples/tool.rs:85:1
[INFO] [stdout]    |
[INFO] [stdout] 85 | #[tool(name = "Multiply", description = "Multiply x and y (i.e.: x * y)")]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the attribute macro `tool` (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<std::string::String, CalcError>
[INFO] [stdout]    --> examples/tool.rs:96:52
[INFO] [stdout]     |
[INFO] [stdout]  96 |   fn exec(x: ExecShell) -> Result<String, CalcError> {
[INFO] [stdout]     |  ____________________________________________________^
[INFO] [stdout]  97 | |     tracing::info!("exec tool is called");
[INFO] [stdout]  98 | |     let results = serde_json::to_string(&x).unwrap();
[INFO] [stdout] ...   |
[INFO] [stdout] 101 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, CalcError>
[INFO] [stdout]    --> examples/tool.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 |     Ok(results)
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, CalcError>
[INFO] [stdout]   --> examples/tool.rs:93:1
[INFO] [stdout]    |
[INFO] [stdout] 93 | / #[tool(description = "
[INFO] [stdout] 94 | | Execute the shell command, can execute multiple commands at once.
[INFO] [stdout] 95 | | ")]
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, CalcError>
[INFO] [stdout]   --> examples/tool.rs:93:1
[INFO] [stdout]    |
[INFO] [stdout] 93 | / #[tool(description = "
[INFO] [stdout] 94 | | Execute the shell command, can execute multiple commands at once.
[INFO] [stdout] 95 | | ")]
[INFO] [stdout]    | |___^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the attribute macro `tool` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rigs` (example "tool") due to 16 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0aa0981f136c9c8af21928c85e71f9edc17f5e6fa86ae4c4fe88569baac3f2ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aa0981f136c9c8af21928c85e71f9edc17f5e6fa86ae4c4fe88569baac3f2ec", kill_on_drop: false }`
[INFO] [stdout] 0aa0981f136c9c8af21928c85e71f9edc17f5e6fa86ae4c4fe88569baac3f2ec
