[INFO] updating cached repository XOSplicer/rust_crypto_challenge
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/XOSplicer/rust_crypto_challenge
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/XOSplicer/rust_crypto_challenge" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/XOSplicer/rust_crypto_challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/XOSplicer/rust_crypto_challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/XOSplicer/rust_crypto_challenge" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/XOSplicer/rust_crypto_challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/XOSplicer/rust_crypto_challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7c1ad87a68853b71829a38ada2fa1a06b4331a5d
[INFO] sha for GitHub repo XOSplicer/rust_crypto_challenge: 7c1ad87a68853b71829a38ada2fa1a06b4331a5d
[INFO] validating manifest of XOSplicer/rust_crypto_challenge 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 XOSplicer/rust_crypto_challenge 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 XOSplicer/rust_crypto_challenge
[INFO] finished frobbing XOSplicer/rust_crypto_challenge
[INFO] frobbed toml for XOSplicer/rust_crypto_challenge written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/XOSplicer/rust_crypto_challenge/Cargo.toml
[INFO] started frobbing XOSplicer/rust_crypto_challenge
[INFO] finished frobbing XOSplicer/rust_crypto_challenge
[INFO] frobbed toml for XOSplicer/rust_crypto_challenge written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/XOSplicer/rust_crypto_challenge/Cargo.toml
[INFO] crate XOSplicer/rust_crypto_challenge 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] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking XOSplicer/rust_crypto_challenge against try#06a150c7d11500b41499224f165e9de1de096768 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-4/try#06a150c7d11500b41499224f165e9de1de096768:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/XOSplicer/rust_crypto_challenge:/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" "+06a150c7d11500b41499224f165e9de1de096768-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] bc55ffce61e94bd33b5877b92fe9209a814e213b27a6817dd4679d3dbe9757e6
[INFO] running `"docker" "start" "-a" "bc55ffce61e94bd33b5877b92fe9209a814e213b27a6817dd4679d3dbe9757e6"`
[INFO] [stderr]     Checking crypto_challenge v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core.rs:49:7
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let mut vec6bit = Vec::new();
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/core.rs:21:2
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn new() -> Hex {
[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/core.rs:91:2
[INFO] [stderr]    |
[INFO] [stderr] 91 |     pub fn new() -> Base64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core.rs:49:7
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let mut vec6bit = Vec::new();
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/core.rs:21:2
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn new() -> Hex {
[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/core.rs:91:2
[INFO] [stderr]    |
[INFO] [stderr] 91 |     pub fn new() -> Base64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `"docker" "inspect" "bc55ffce61e94bd33b5877b92fe9209a814e213b27a6817dd4679d3dbe9757e6"`
[INFO] running `"docker" "rm" "-f" "bc55ffce61e94bd33b5877b92fe9209a814e213b27a6817dd4679d3dbe9757e6"`
[INFO] [stdout] bc55ffce61e94bd33b5877b92fe9209a814e213b27a6817dd4679d3dbe9757e6