[INFO] updating cached repository https://github.com/leshow/rust_mnemonic
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9a7876be13a7893b4e417dab328d6232a30218d5
[INFO] checking leshow/rust_mnemonic against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleshow%2Frust_mnemonic" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leshow/rust_mnemonic 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/leshow/rust_mnemonic
[INFO] finished tweaking git repo https://github.com/leshow/rust_mnemonic
[INFO] tweaked toml for git repo https://github.com/leshow/rust_mnemonic written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/leshow/rust_mnemonic 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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] e49772597fe8289c21d879a8d09cd11018284f995294f67bce7c040dff27de2c
[INFO] running `"docker" "start" "-a" "e49772597fe8289c21d879a8d09cd11018284f995294f67bce7c040dff27de2c"`
[INFO] [stderr]     Checking serde v1.0.55
[INFO] [stderr]     Checking getopts v0.2.17
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling syn v0.13.10
[INFO] [stderr]    Compiling serde_derive v1.0.55
[INFO] [stderr]     Checking serde_json v1.0.17
[INFO] [stderr]     Checking rust_mnemonic v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: static item is never used: `PBKDF2_KEY_LEN`
[INFO] [stderr]   --> src/mnemonic.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | static PBKDF2_KEY_LEN: usize = 64;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `DIGEST_ALG`
[INFO] [stderr]   --> src/mnemonic.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | static DIGEST_ALG: &digest::Algorithm = &digest::SHA512;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_seed`
[INFO] [stderr]   --> src/mnemonic.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 | /     pub fn to_seed<S, M>(&self, mnemonic: M, seed_value: S) -> Vec<u8>
[INFO] [stderr] 41 | |     where
[INFO] [stderr] 42 | |         S: AsRef<str>,
[INFO] [stderr] 43 | |         M: AsRef<str>,
[INFO] [stderr] ...  |
[INFO] [stderr] 55 | |         result
[INFO] [stderr] 56 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `salt`
[INFO] [stderr]   --> src/mnemonic.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn salt<S: AsRef<str>>(&self, username: S) -> Vec<u8> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_json`
[INFO] [stderr]   --> src/mnemonic.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn to_json(&self, wordslist: &[String]) -> Result<String, MnemonicError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Num`
[INFO] [stderr]   --> src/settings.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Num(u8),
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `PBKDF2_KEY_LEN`
[INFO] [stderr]   --> src/mnemonic.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | static PBKDF2_KEY_LEN: usize = 64;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `DIGEST_ALG`
[INFO] [stderr]   --> src/mnemonic.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | static DIGEST_ALG: &digest::Algorithm = &digest::SHA512;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_seed`
[INFO] [stderr]   --> src/mnemonic.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 | /     pub fn to_seed<S, M>(&self, mnemonic: M, seed_value: S) -> Vec<u8>
[INFO] [stderr] 41 | |     where
[INFO] [stderr] 42 | |         S: AsRef<str>,
[INFO] [stderr] 43 | |         M: AsRef<str>,
[INFO] [stderr] ...  |
[INFO] [stderr] 55 | |         result
[INFO] [stderr] 56 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `salt`
[INFO] [stderr]   --> src/mnemonic.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn salt<S: AsRef<str>>(&self, username: S) -> Vec<u8> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_json`
[INFO] [stderr]   --> src/mnemonic.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn to_json(&self, wordslist: &[String]) -> Result<String, MnemonicError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Num`
[INFO] [stderr]   --> src/settings.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Num(u8),
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.18s
[INFO] running `"docker" "inspect" "e49772597fe8289c21d879a8d09cd11018284f995294f67bce7c040dff27de2c"`
[INFO] running `"docker" "rm" "-f" "e49772597fe8289c21d879a8d09cd11018284f995294f67bce7c040dff27de2c"`
[INFO] [stdout] e49772597fe8289c21d879a8d09cd11018284f995294f67bce7c040dff27de2c