[INFO] updating cached repository https://github.com/adrianbrink/rustlings
[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] 0f7a4dbe9c6744b4f27a2960564cb8f67b4fda15
[INFO] checking adrianbrink/rustlings against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadrianbrink%2Frustlings" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/adrianbrink/rustlings on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/adrianbrink/rustlings
[INFO] finished tweaking git repo https://github.com/adrianbrink/rustlings
[INFO] tweaked toml for git repo https://github.com/adrianbrink/rustlings written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/adrianbrink/rustlings already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-1/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" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d3013acd1eb3d36aa1d5e321050ab28bf8df0f4fdce329c92a4a490a42ad693d
[INFO] running `"docker" "start" "-a" "d3013acd1eb3d36aa1d5e321050ab28bf8df0f4fdce329c92a4a490a42ad693d"`
[INFO] [stderr]     Checking rustlings v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `is_even`
[INFO] [stderr]  --> src/tests.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn is_even(num: i32) -> bool {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `times_two`
[INFO] [stderr]  --> src/tests.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn times_two(num: i32) -> i32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.06s
[INFO] running `"docker" "inspect" "d3013acd1eb3d36aa1d5e321050ab28bf8df0f4fdce329c92a4a490a42ad693d"`
[INFO] running `"docker" "rm" "-f" "d3013acd1eb3d36aa1d5e321050ab28bf8df0f4fdce329c92a4a490a42ad693d"`
[INFO] [stdout] d3013acd1eb3d36aa1d5e321050ab28bf8df0f4fdce329c92a4a490a42ad693d