[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-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/fotcorn/rust_crypto_challenges"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/fotcorn/rust_crypto_challenges'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fotcorn/rust_crypto_challenges" "work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/fotcorn/rust_crypto_challenges"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/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#efe2f32a6b8217425f361ec7c206910c611c03ee
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of fotcorn/rust_crypto_challenges on toolchain try#78b0bd8441ef961f6475e3d47fe3bca38cb83432
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-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-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/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-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/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/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/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/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking fotcorn/rust_crypto_challenges against master#efe2f32a6b8217425f361ec7c206910c611c03ee for pr-60039
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039/worker-6/master#efe2f32a6b8217425f361ec7c206910c611c03ee:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/fotcorn/rust_crypto_challenges:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 869c75a26ac6a16df49d3fc0316e63564f055f05d24191142bff20abf97e97ca
[INFO] running `"docker" "start" "-a" "869c75a26ac6a16df49d3fc0316e63564f055f05d24191142bff20abf97e97ca"`
[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 4.48s
[INFO] running `"docker" "inspect" "869c75a26ac6a16df49d3fc0316e63564f055f05d24191142bff20abf97e97ca"`
[INFO] running `"docker" "rm" "-f" "869c75a26ac6a16df49d3fc0316e63564f055f05d24191142bff20abf97e97ca"`
[INFO] [stdout] 869c75a26ac6a16df49d3fc0316e63564f055f05d24191142bff20abf97e97ca