[INFO] cloning repository https://github.com/XOSplicer/rust_crypto_challenge
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/XOSplicer/rust_crypto_challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXOSplicer%2Frust_crypto_challenge"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXOSplicer%2Frust_crypto_challenge'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7c1ad87a68853b71829a38ada2fa1a06b4331a5d
[INFO] checking XOSplicer/rust_crypto_challenge against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FXOSplicer%2Frust_crypto_challenge" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/XOSplicer/rust_crypto_challenge on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/XOSplicer/rust_crypto_challenge
[INFO] finished tweaking git repo https://github.com/XOSplicer/rust_crypto_challenge
[INFO] tweaked toml for git repo https://github.com/XOSplicer/rust_crypto_challenge written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/XOSplicer/rust_crypto_challenge already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3077dd018dc61965d5f3a152211dedb927d0b4b573566d8c61dcd5fc8b49ac4c
[INFO] running `"docker" "start" "-a" "3077dd018dc61965d5f3a152211dedb927d0b4b573566d8c61dcd5fc8b49ac4c"`
[INFO] [stderr]     Checking crypto_challenge v0.1.0 (/opt/rustwide/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 1.38s
[INFO] running `"docker" "inspect" "3077dd018dc61965d5f3a152211dedb927d0b4b573566d8c61dcd5fc8b49ac4c"`
[INFO] running `"docker" "rm" "-f" "3077dd018dc61965d5f3a152211dedb927d0b4b573566d8c61dcd5fc8b49ac4c"`
[INFO] [stdout] 3077dd018dc61965d5f3a152211dedb927d0b4b573566d8c61dcd5fc8b49ac4c