[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-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/XOSplicer/rust_crypto_challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/XOSplicer/rust_crypto_challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/XOSplicer/rust_crypto_challenge" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/XOSplicer/rust_crypto_challenge"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/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#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of XOSplicer/rust_crypto_challenge on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-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-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/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-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/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/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking XOSplicer/rust_crypto_challenge against try#99a7498759a22b5684caf798a98b7e90ad9d2443 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-7/try#99a7498759a22b5684caf798a98b7e90ad9d2443:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/XOSplicer/rust_crypto_challenge:/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" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 57a5f2a15c05dfd7ed97bf462def5d0878697fe608a75321a86ab12b8df6f92b
[INFO] running `"docker" "start" "-a" "57a5f2a15c05dfd7ed97bf462def5d0878697fe608a75321a86ab12b8df6f92b"`
[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 0.97s
[INFO] running `"docker" "inspect" "57a5f2a15c05dfd7ed97bf462def5d0878697fe608a75321a86ab12b8df6f92b"`
[INFO] running `"docker" "rm" "-f" "57a5f2a15c05dfd7ed97bf462def5d0878697fe608a75321a86ab12b8df6f92b"`
[INFO] [stdout] 57a5f2a15c05dfd7ed97bf462def5d0878697fe608a75321a86ab12b8df6f92b