[INFO] updating cached repository https://github.com/benblank/cryptopals-rust
[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] e105b5a68589e170414be673ab2d2bf0eefa2475
[INFO] checking benblank/cryptopals-rust against master#9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7 for pr-64564
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbenblank%2Fcryptopals-rust" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/benblank/cryptopals-rust on toolchain 9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/benblank/cryptopals-rust
[INFO] finished tweaking git repo https://github.com/benblank/cryptopals-rust
[INFO] tweaked toml for git repo https://github.com/benblank/cryptopals-rust written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/benblank/cryptopals-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/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" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6f423a49ef50ada4a83513afb54f1509a310162425e51d99d44a65315a1c511a
[INFO] running `"docker" "start" "-a" "6f423a49ef50ada4a83513afb54f1509a310162425e51d99d44a65315a1c511a"`
[INFO] [stderr]     Checking cryptopals v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `encrypt_block`
[INFO] [stderr]   --> src/rijndael.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | pub fn encrypt_block(block: &[u8], key: &[u8]) -> Result<Vec<u8>, String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mix_column`
[INFO] [stderr]    --> src/rijndael.rs:230:1
[INFO] [stderr]     |
[INFO] [stderr] 230 | fn mix_column(column: &mut [u8]) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mix_columns`
[INFO] [stderr]    --> src/rijndael.rs:251:1
[INFO] [stderr]     |
[INFO] [stderr] 251 | fn mix_columns(state: &mut [u8]) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `shift_rows`
[INFO] [stderr]    --> src/rijndael.rs:257:1
[INFO] [stderr]     |
[INFO] [stderr] 257 | fn shift_rows(state: &mut [u8]) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.79s
[INFO] running `"docker" "inspect" "6f423a49ef50ada4a83513afb54f1509a310162425e51d99d44a65315a1c511a"`
[INFO] running `"docker" "rm" "-f" "6f423a49ef50ada4a83513afb54f1509a310162425e51d99d44a65315a1c511a"`
[INFO] [stdout] 6f423a49ef50ada4a83513afb54f1509a310162425e51d99d44a65315a1c511a