[INFO] cloning repository https://github.com/jeremyletang/trueskill-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeremyletang/trueskill-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremyletang%2Ftrueskill-rs"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremyletang%2Ftrueskill-rs'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9ef44f2c5695636836303c7cb1fdede1ac7804cd
[INFO] checking jeremyletang/trueskill-rs against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremyletang%2Ftrueskill-rs" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeremyletang/trueskill-rs on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jeremyletang/trueskill-rs
[INFO] finished tweaking git repo https://github.com/jeremyletang/trueskill-rs
[INFO] tweaked toml for git repo https://github.com/jeremyletang/trueskill-rs written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jeremyletang/trueskill-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-12/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9cfded0c79914354bbed3ca77e137aa432118b63d57facc62fe0049a460e7344
[INFO] running `"docker" "start" "-a" "9cfded0c79914354bbed3ca77e137aa432118b63d57facc62fe0049a460e7344"`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking trueskill v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/math.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | /     (F::one() / (cast::<f64, F>(2f64).unwrap() *
[INFO] [stderr] 32 | |         cast::<f64, F>(::std::f64::consts::PI).unwrap()).sqrt() * sigma_.abs() *
[INFO] [stderr] 33 | |             (-((((x - mu_) / sigma_.abs())).powi(2) / cast::<f64, F>(2f64).unwrap())).exp())
[INFO] [stderr]    | |____________________________________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 31 |     F::one() / (cast::<f64, F>(2f64).unwrap() *
[INFO] [stderr] 32 |         cast::<f64, F>(::std::f64::consts::PI).unwrap()).sqrt() * sigma_.abs() *
[INFO] [stderr] 33 |             (-((((x - mu_) / sigma_.abs())).powi(2) / cast::<f64, F>(2f64).unwrap())).exp()
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `complementary_error`
[INFO] [stderr]  --> src/math.rs:4:4
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn complementary_error<F: Float + One + Zero>(x: F) -> F {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cumulative_distribution`
[INFO] [stderr]   --> src/math.rs:18:4
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn cumulative_distribution<F: Float + One + Zero>(x: F, mu: Option<F>, sigma: Option<F>) -> F {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `probability_density`
[INFO] [stderr]   --> src/math.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn probability_density<F: Float + One + Zero>(x: F, mu: Option<F>, sigma: Option<F>) -> F {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `complementary_error_inv`
[INFO] [stderr]   --> src/math.rs:36:4
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn complementary_error_inv<F: Float + One + Zero>(mut y: F) -> F {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cumulative_distribution_inv`
[INFO] [stderr]   --> src/math.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn cumulative_distribution_inv<F: Float + One + Zero>(x: F, mu: Option<F>, sigma: Option<F>) -> F {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/math.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | /     (F::one() / (cast::<f64, F>(2f64).unwrap() *
[INFO] [stderr] 32 | |         cast::<f64, F>(::std::f64::consts::PI).unwrap()).sqrt() * sigma_.abs() *
[INFO] [stderr] 33 | |             (-((((x - mu_) / sigma_.abs())).powi(2) / cast::<f64, F>(2f64).unwrap())).exp())
[INFO] [stderr]    | |____________________________________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 31 |     F::one() / (cast::<f64, F>(2f64).unwrap() *
[INFO] [stderr] 32 |         cast::<f64, F>(::std::f64::consts::PI).unwrap()).sqrt() * sigma_.abs() *
[INFO] [stderr] 33 |             (-((((x - mu_) / sigma_.abs())).powi(2) / cast::<f64, F>(2f64).unwrap())).exp()
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `complementary_error_inv`
[INFO] [stderr]   --> src/math.rs:36:4
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn complementary_error_inv<F: Float + One + Zero>(mut y: F) -> F {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cumulative_distribution_inv`
[INFO] [stderr]   --> src/math.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn cumulative_distribution_inv<F: Float + One + Zero>(x: F, mu: Option<F>, sigma: Option<F>) -> F {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.65s
[INFO] running `"docker" "inspect" "9cfded0c79914354bbed3ca77e137aa432118b63d57facc62fe0049a460e7344"`
[INFO] running `"docker" "rm" "-f" "9cfded0c79914354bbed3ca77e137aa432118b63d57facc62fe0049a460e7344"`
[INFO] [stdout] 9cfded0c79914354bbed3ca77e137aa432118b63d57facc62fe0049a460e7344