[INFO] updating cached repository fotcorn/rust_crypto_challenges
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fotcorn/rust_crypto_challenges
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fotcorn/rust_crypto_challenges" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/fotcorn/rust_crypto_challenges"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/fotcorn/rust_crypto_challenges'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fotcorn/rust_crypto_challenges" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/fotcorn/rust_crypto_challenges"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/fotcorn/rust_crypto_challenges'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 04eb07f2844dc52b581385f8d3bdc52ac05656dc
[INFO] sha for GitHub repo fotcorn/rust_crypto_challenges: 04eb07f2844dc52b581385f8d3bdc52ac05656dc
[INFO] validating manifest of fotcorn/rust_crypto_challenges on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of fotcorn/rust_crypto_challenges on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing fotcorn/rust_crypto_challenges
[INFO] finished frobbing fotcorn/rust_crypto_challenges
[INFO] frobbed toml for fotcorn/rust_crypto_challenges written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/fotcorn/rust_crypto_challenges/Cargo.toml
[INFO] started frobbing fotcorn/rust_crypto_challenges
[INFO] finished frobbing fotcorn/rust_crypto_challenges
[INFO] frobbed toml for fotcorn/rust_crypto_challenges written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/fotcorn/rust_crypto_challenges/Cargo.toml
[INFO] crate fotcorn/rust_crypto_challenges already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/fotcorn/rust_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" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking fotcorn/rust_crypto_challenges against try#f45cc3094ee337acd688771b9234318046b0572d for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-0/try#f45cc3094ee337acd688771b9234318046b0572d:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/fotcorn/rust_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" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e3e0f8477010eab1f220fbf58e161d6bb38c61075e46055fa691f0007a6bf734
[INFO] running `"docker" "start" "-a" "e3e0f8477010eab1f220fbf58e161d6bb38c61075e46055fa691f0007a6bf734"`
[INFO] [stderr]     Checking rust_crypto_challenges v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Decryptor`
[INFO] [stderr]   --> src/bin/set1_challenge7.rs:11:31
[INFO] [stderr]    |
[INFO] [stderr] 11 | use crypto::symmetriccipher::{Decryptor};
[INFO] [stderr]    |                               ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Decryptor`
[INFO] [stderr]   --> src/bin/set1_challenge7.rs:11:31
[INFO] [stderr]    |
[INFO] [stderr] 11 | use crypto::symmetriccipher::{Decryptor};
[INFO] [stderr]    |                               ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.91s
[INFO] running `"docker" "inspect" "e3e0f8477010eab1f220fbf58e161d6bb38c61075e46055fa691f0007a6bf734"`
[INFO] running `"docker" "rm" "-f" "e3e0f8477010eab1f220fbf58e161d6bb38c61075e46055fa691f0007a6bf734"`
[INFO] [stdout] e3e0f8477010eab1f220fbf58e161d6bb38c61075e46055fa691f0007a6bf734