[INFO] fetching crate optim 0.2.0...
[INFO] testing optim-0.2.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate optim 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate optim 0.2.0
[INFO] finished tweaking crates.io crate optim 0.2.0
[INFO] tweaked toml for crates.io crate optim 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate optim 0.2.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate optim 0.2.0 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f9091f5e84639553b2b32181716802ef2d7fabd0eae8ecdb941f1592fd4da24c
[INFO] running `Command { std: "docker" "start" "-a" "f9091f5e84639553b2b32181716802ef2d7fabd0eae8ecdb941f1592fd4da24c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9091f5e84639553b2b32181716802ef2d7fabd0eae8ecdb941f1592fd4da24c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9091f5e84639553b2b32181716802ef2d7fabd0eae8ecdb941f1592fd4da24c", kill_on_drop: false }`
[INFO] [stdout] f9091f5e84639553b2b32181716802ef2d7fabd0eae8ecdb941f1592fd4da24c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c654948984ee4503269d1e01eab851cd7ce5fa5a01a2b2fcd898ef868bbe0a6c
[INFO] running `Command { std: "docker" "start" "-a" "c654948984ee4503269d1e01eab851cd7ce5fa5a01a2b2fcd898ef868bbe0a6c", kill_on_drop: false }`
[INFO] [stderr]    Compiling optim v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `constraint`
[INFO] [stdout]   --> src/lib.rs:24:36
[INFO] [stdout]    |
[INFO] [stdout] 24 |   pub fn add_constraint(&mut self, constraint: Constraint) {}
[INFO] [stdout]    |                                    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]    |
[INFO] [stdout] 24 |   pub fn add_constraint(&mut self, _constraint: Constraint) {}
[INFO] [stdout]    |                                    +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named struct `Constraint` (notice the capitalization)
[INFO] [stdout]    |
[INFO] [stdout] 24 -   pub fn add_constraint(&mut self, constraint: Constraint) {}
[INFO] [stdout] 24 +   pub fn add_constraint(&mut self, Constraint: Constraint) {}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variable`
[INFO] [stdout]   --> src/lib.rs:25:30
[INFO] [stdout]    |
[INFO] [stdout] 25 |   pub fn maximise(&mut self, variable: Variable) {}
[INFO] [stdout]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variable`
[INFO] [stdout]   --> src/lib.rs:26:30
[INFO] [stdout]    |
[INFO] [stdout] 26 |   pub fn minimise(&mut self, variable: Variable) {}
[INFO] [stdout]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `constraints` is never read
[INFO] [stdout]  --> src/lib.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Model {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 4 |   variables: HashMap<String, Option<f64>>,
[INFO] [stdout] 5 |   constraints: Vec<Constraint>,
[INFO] [stdout]   |   ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "c654948984ee4503269d1e01eab851cd7ce5fa5a01a2b2fcd898ef868bbe0a6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c654948984ee4503269d1e01eab851cd7ce5fa5a01a2b2fcd898ef868bbe0a6c", kill_on_drop: false }`
[INFO] [stdout] c654948984ee4503269d1e01eab851cd7ce5fa5a01a2b2fcd898ef868bbe0a6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0806c034ecaa8c7045350266045b442ad517a605b78a08e663e46e25f3318352
[INFO] running `Command { std: "docker" "start" "-a" "0806c034ecaa8c7045350266045b442ad517a605b78a08e663e46e25f3318352", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `constraint`
[INFO] [stdout]   --> src/lib.rs:24:36
[INFO] [stdout]    |
[INFO] [stdout] 24 |   pub fn add_constraint(&mut self, constraint: Constraint) {}
[INFO] [stdout]    |                                    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]    |
[INFO] [stdout] 24 |   pub fn add_constraint(&mut self, _constraint: Constraint) {}
[INFO] [stdout]    |                                    +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named struct `Constraint` (notice the capitalization)
[INFO] [stdout]    |
[INFO] [stdout] 24 -   pub fn add_constraint(&mut self, constraint: Constraint) {}
[INFO] [stdout] 24 +   pub fn add_constraint(&mut self, Constraint: Constraint) {}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variable`
[INFO] [stdout]   --> src/lib.rs:25:30
[INFO] [stdout]    |
[INFO] [stdout] 25 |   pub fn maximise(&mut self, variable: Variable) {}
[INFO] [stdout]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variable`
[INFO] [stdout]   --> src/lib.rs:26:30
[INFO] [stdout]    |
[INFO] [stdout] 26 |   pub fn minimise(&mut self, variable: Variable) {}
[INFO] [stdout]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling optim v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `constraints` is never read
[INFO] [stdout]  --> src/lib.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Model {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 4 |   variables: HashMap<String, Option<f64>>,
[INFO] [stdout] 5 |   constraints: Vec<Constraint>,
[INFO] [stdout]   |   ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `constraint`
[INFO] [stdout]   --> src/lib.rs:24:36
[INFO] [stdout]    |
[INFO] [stdout] 24 |   pub fn add_constraint(&mut self, constraint: Constraint) {}
[INFO] [stdout]    |                                    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]    |
[INFO] [stdout] 24 |   pub fn add_constraint(&mut self, _constraint: Constraint) {}
[INFO] [stdout]    |                                    +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named struct `Constraint` (notice the capitalization)
[INFO] [stdout]    |
[INFO] [stdout] 24 -   pub fn add_constraint(&mut self, constraint: Constraint) {}
[INFO] [stdout] 24 +   pub fn add_constraint(&mut self, Constraint: Constraint) {}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variable`
[INFO] [stdout]   --> src/lib.rs:25:30
[INFO] [stdout]    |
[INFO] [stdout] 25 |   pub fn maximise(&mut self, variable: Variable) {}
[INFO] [stdout]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variable`
[INFO] [stdout]   --> src/lib.rs:26:30
[INFO] [stdout]    |
[INFO] [stdout] 26 |   pub fn minimise(&mut self, variable: Variable) {}
[INFO] [stdout]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `constraints` is never read
[INFO] [stdout]  --> src/lib.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Model {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 4 |   variables: HashMap<String, Option<f64>>,
[INFO] [stdout] 5 |   constraints: Vec<Constraint>,
[INFO] [stdout]   |   ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "0806c034ecaa8c7045350266045b442ad517a605b78a08e663e46e25f3318352", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0806c034ecaa8c7045350266045b442ad517a605b78a08e663e46e25f3318352", kill_on_drop: false }`
[INFO] [stdout] 0806c034ecaa8c7045350266045b442ad517a605b78a08e663e46e25f3318352
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 01a10d0695b6f8977c19fee3e6d302eb6b28a5b111606e0d69d61bd7107539c2
[INFO] running `Command { std: "docker" "start" "-a" "01a10d0695b6f8977c19fee3e6d302eb6b28a5b111606e0d69d61bd7107539c2", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `constraint`
[INFO] [stderr]   --> src/lib.rs:24:36
[INFO] [stderr]    |
[INFO] [stderr] 24 |   pub fn add_constraint(&mut self, constraint: Constraint) {}
[INFO] [stderr]    |                                    ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: if this is intentional, prefix it with an underscore
[INFO] [stderr]    |
[INFO] [stderr] 24 |   pub fn add_constraint(&mut self, _constraint: Constraint) {}
[INFO] [stderr]    |                                    +
[INFO] [stderr] help: you might have meant to pattern match on the similarly named struct `Constraint` (notice the capitalization)
[INFO] [stderr]    |
[INFO] [stderr] 24 -   pub fn add_constraint(&mut self, constraint: Constraint) {}
[INFO] [stderr] 24 +   pub fn add_constraint(&mut self, Constraint: Constraint) {}
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `variable`
[INFO] [stderr]   --> src/lib.rs:25:30
[INFO] [stderr]    |
[INFO] [stderr] 25 |   pub fn maximise(&mut self, variable: Variable) {}
[INFO] [stderr]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variable`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `variable`
[INFO] [stderr]   --> src/lib.rs:26:30
[INFO] [stderr]    |
[INFO] [stderr] 26 |   pub fn minimise(&mut self, variable: Variable) {}
[INFO] [stderr]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variable`
[INFO] [stderr] 
[INFO] [stderr] warning: field `constraints` is never read
[INFO] [stderr]  --> src/lib.rs:5:3
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Model {
[INFO] [stderr]   |            ----- field in this struct
[INFO] [stderr] 4 |   variables: HashMap<String, Option<f64>>,
[INFO] [stderr] 5 |   constraints: Vec<Constraint>,
[INFO] [stderr]   |   ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `optim` (lib) generated 4 warnings (run `cargo fix --lib -p optim` to apply 1 suggestion)
[INFO] [stderr] warning: `optim` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/optim-45a10ad3d2e92b5d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/optim-ba63b9bb06be949f)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests optim
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "01a10d0695b6f8977c19fee3e6d302eb6b28a5b111606e0d69d61bd7107539c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01a10d0695b6f8977c19fee3e6d302eb6b28a5b111606e0d69d61bd7107539c2", kill_on_drop: false }`
[INFO] [stdout] 01a10d0695b6f8977c19fee3e6d302eb6b28a5b111606e0d69d61bd7107539c2