[INFO] updating cached repository https://github.com/scalalang2/rust-crypto-for-tutorial
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] f15b8fd6bd0f2b19843f4e0c3f2e4aa7c85fc0a4
[INFO] checking scalalang2/rust-crypto-for-tutorial against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscalalang2%2Frust-crypto-for-tutorial" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scalalang2/rust-crypto-for-tutorial on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/scalalang2/rust-crypto-for-tutorial
[INFO] finished tweaking git repo https://github.com/scalalang2/rust-crypto-for-tutorial
[INFO] tweaked toml for git repo https://github.com/scalalang2/rust-crypto-for-tutorial written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/scalalang2/rust-crypto-for-tutorial already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "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] 66d10f6cca073c044b8ee83be382269d08856d7241e78a4bf9cc293a4c027732
[INFO] running `"docker" "start" "-a" "66d10f6cca073c044b8ee83be382269d08856d7241e78a4bf9cc293a4c027732"`
[INFO] [stderr]     Checking rust-crypto-for-tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `Shift`
[INFO] [stderr]  --> src/one_time_pad.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Shift {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `start`
[INFO] [stderr]  --> src/one_time_pad.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn start() {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Shift`
[INFO] [stderr]  --> src/one_time_pad.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Shift {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `start`
[INFO] [stderr]  --> src/one_time_pad.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn start() {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `"docker" "inspect" "66d10f6cca073c044b8ee83be382269d08856d7241e78a4bf9cc293a4c027732"`
[INFO] running `"docker" "rm" "-f" "66d10f6cca073c044b8ee83be382269d08856d7241e78a4bf9cc293a4c027732"`
[INFO] [stdout] 66d10f6cca073c044b8ee83be382269d08856d7241e78a4bf9cc293a4c027732