[INFO] updating cached repository leshow/rust_mnemonic
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/leshow/rust_mnemonic
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/leshow/rust_mnemonic" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/leshow/rust_mnemonic"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/leshow/rust_mnemonic'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/leshow/rust_mnemonic" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/leshow/rust_mnemonic"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/leshow/rust_mnemonic'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9a7876be13a7893b4e417dab328d6232a30218d5
[INFO] sha for GitHub repo leshow/rust_mnemonic: 9a7876be13a7893b4e417dab328d6232a30218d5
[INFO] validating manifest of leshow/rust_mnemonic on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of leshow/rust_mnemonic on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing leshow/rust_mnemonic
[INFO] finished frobbing leshow/rust_mnemonic
[INFO] frobbed toml for leshow/rust_mnemonic written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/leshow/rust_mnemonic/Cargo.toml
[INFO] started frobbing leshow/rust_mnemonic
[INFO] finished frobbing leshow/rust_mnemonic
[INFO] frobbed toml for leshow/rust_mnemonic written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/leshow/rust_mnemonic/Cargo.toml
[INFO] crate leshow/rust_mnemonic already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking leshow/rust_mnemonic against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/leshow/rust_mnemonic:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 57db465631a4a697121a95199d9162c3f875233789c0c69b8efa7be7050fe61c
[INFO] running `"docker" "start" "-a" "57db465631a4a697121a95199d9162c3f875233789c0c69b8efa7be7050fe61c"`
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking rust_mnemonic v0.3.0 (/opt/crater/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: struct is never constructed: `MnemonicResponse`
[INFO] [stderr]   --> src/mnemonic.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct MnemonicResponse<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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: struct is never constructed: `MnemonicResponse`
[INFO] [stderr]   --> src/mnemonic.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct MnemonicResponse<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 12.69s
[INFO] running `"docker" "inspect" "57db465631a4a697121a95199d9162c3f875233789c0c69b8efa7be7050fe61c"`
[INFO] running `"docker" "rm" "-f" "57db465631a4a697121a95199d9162c3f875233789c0c69b8efa7be7050fe61c"`
[INFO] [stdout] 57db465631a4a697121a95199d9162c3f875233789c0c69b8efa7be7050fe61c