[INFO] updating cached repository https://github.com/jeremyletang/trueskill-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9ef44f2c5695636836303c7cb1fdede1ac7804cd
[INFO] checking jeremyletang/trueskill-rs against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremyletang%2Ftrueskill-rs" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeremyletang/trueskill-rs on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "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 work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/jeremyletang/trueskill-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8d3aca775bb14fca98af32e2dd0ea31bbc5af5571946c7d2bcd3bef1a2cdf662
[INFO] running `"docker" "start" "-a" "8d3aca775bb14fca98af32e2dd0ea31bbc5af5571946c7d2bcd3bef1a2cdf662"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking trueskill v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `complementary_error`
[INFO] [stderr]  --> src/math.rs:4:1
[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:18:1
[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:27:1
[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:36:1
[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:60:1
[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: function is never used: `complementary_error_inv`
[INFO] [stderr]   --> src/math.rs:36:1
[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:60:1
[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]     Finished dev [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `"docker" "inspect" "8d3aca775bb14fca98af32e2dd0ea31bbc5af5571946c7d2bcd3bef1a2cdf662"`
[INFO] running `"docker" "rm" "-f" "8d3aca775bb14fca98af32e2dd0ea31bbc5af5571946c7d2bcd3bef1a2cdf662"`
[INFO] [stdout] 8d3aca775bb14fca98af32e2dd0ea31bbc5af5571946c7d2bcd3bef1a2cdf662