[INFO] updating cached repository stallmanifold/rust-matasano-crypto-challenges
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stallmanifold/rust-matasano-crypto-challenges
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stallmanifold/rust-matasano-crypto-challenges" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/stallmanifold/rust-matasano-crypto-challenges"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/stallmanifold/rust-matasano-crypto-challenges'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stallmanifold/rust-matasano-crypto-challenges" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/stallmanifold/rust-matasano-crypto-challenges"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/stallmanifold/rust-matasano-crypto-challenges'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 354e6a55d47c0162ff8cd273eba4dc95d81ee5cb
[INFO] sha for GitHub repo stallmanifold/rust-matasano-crypto-challenges: 354e6a55d47c0162ff8cd273eba4dc95d81ee5cb
[INFO] validating manifest of stallmanifold/rust-matasano-crypto-challenges on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of stallmanifold/rust-matasano-crypto-challenges on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing stallmanifold/rust-matasano-crypto-challenges
[INFO] finished frobbing stallmanifold/rust-matasano-crypto-challenges
[INFO] frobbed toml for stallmanifold/rust-matasano-crypto-challenges written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/stallmanifold/rust-matasano-crypto-challenges/Cargo.toml
[INFO] started frobbing stallmanifold/rust-matasano-crypto-challenges
[INFO] finished frobbing stallmanifold/rust-matasano-crypto-challenges
[INFO] frobbed toml for stallmanifold/rust-matasano-crypto-challenges written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/stallmanifold/rust-matasano-crypto-challenges/Cargo.toml
[INFO] crate stallmanifold/rust-matasano-crypto-challenges already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/stallmanifold/rust-matasano-crypto-challenges/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking stallmanifold/rust-matasano-crypto-challenges against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-4/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/stallmanifold/rust-matasano-crypto-challenges:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4b544de937b844b793bef85be62ee4e4c236140d95b6f41612c9147c14af91fd
[INFO] running `"docker" "start" "-a" "4b544de937b844b793bef85be62ee4e4c236140d95b6f41612c9147c14af91fd"`
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking matasano-crypto-challenges v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/crypto/tests.rs:27:74
[INFO] [stderr]    |
[INFO] [stderr] 27 |     assert_eq!(String::from_utf8(ciphertext).unwrap(), String::from_utf8((expected_ct)).unwrap());
[INFO] [stderr]    |                                                                          ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/crypto/xor_cipher.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new(key: Vec<u8>) -> XorCipher {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/crypto/xor_cipher.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new(key: Vec<u8>) -> XorCipher {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.44s
[INFO] running `"docker" "inspect" "4b544de937b844b793bef85be62ee4e4c236140d95b6f41612c9147c14af91fd"`
[INFO] running `"docker" "rm" "-f" "4b544de937b844b793bef85be62ee4e4c236140d95b6f41612c9147c14af91fd"`
[INFO] [stdout] 4b544de937b844b793bef85be62ee4e4c236140d95b6f41612c9147c14af91fd