[INFO] cloning repository https://github.com/leshow/rust_mnemonic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leshow/rust_mnemonic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleshow%2Frust_mnemonic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleshow%2Frust_mnemonic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 698ab998972f881f23b2fa9e45819e744c9869c6
[INFO] checking leshow/rust_mnemonic against try#09eeb2bacb9b40b2ed1d47f03177442c0632cda1 for pr-157710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleshow%2Frust_mnemonic" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[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-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/leshow/rust_mnemonic on toolchain 09eeb2bacb9b40b2ed1d47f03177442c0632cda1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/leshow/rust_mnemonic already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] a6f649e5df1fc8434036072dd3b44590abea2d963862d47a92dd3896ea45f3f8
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[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a6f649e5df1fc8434036072dd3b44590abea2d963862d47a92dd3896ea45f3f8" "/opt/rustwide/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6f649e5df1fc8434036072dd3b44590abea2d963862d47a92dd3896ea45f3f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a6f649e5df1fc8434036072dd3b44590abea2d963862d47a92dd3896ea45f3f8" "/opt/rustwide/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]     Checking serde v1.0.55
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking spin v0.5.0
[INFO] [stderr]     Checking untrusted v0.6.2
[INFO] [stderr]     Checking getopts v0.2.17
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling syn v0.13.10
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking rand v0.6.5
[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] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/mnemonic.rs:133:32
[INFO] [stdout]     |
[INFO] [stdout] 133 |             Io(ref err) => err.description(),
[INFO] [stdout]     |                                ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/mnemonic.rs:134:35
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Serde(ref err) => err.description(),
[INFO] [stdout]     |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/mnemonic.rs:133:32
[INFO] [stdout]     |
[INFO] [stdout] 133 |             Io(ref err) => err.description(),
[INFO] [stdout]     |                                ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/mnemonic.rs:134:35
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Serde(ref err) => err.description(),
[INFO] [stdout]     |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/mnemonic.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(Serialize)]
[INFO] [stdout]    |          -^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `MnemonicResponse` is not local
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_MnemonicResponse`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Serialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Serialize` may come from an old version of the `serde_derive` crate, try updating your dependency with `cargo update -p serde_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/settings.rs:27:30
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(f) => panic!(f.to_string()),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(f) => panic!("{}", f.to_string()),
[INFO] [stdout]    |                              +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/mnemonic.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(Serialize)]
[INFO] [stdout]    |          -^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `MnemonicResponse` is not local
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_MnemonicResponse`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Serialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Serialize` may come from an old version of the `serde_derive` crate, try updating your dependency with `cargo update -p serde_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/settings.rs:27:30
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(f) => panic!(f.to_string()),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(f) => panic!("{}", f.to_string()),
[INFO] [stdout]    |                              +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/mnemonic.rs:133:32
[INFO] [stdout]     |
[INFO] [stdout] 133 |             Io(ref err) => err.description(),
[INFO] [stdout]     |                                ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/mnemonic.rs:134:35
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Serde(ref err) => err.description(),
[INFO] [stdout]     |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `PBKDF2_KEY_LEN` is never used
[INFO] [stdout]   --> src/mnemonic.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | static PBKDF2_KEY_LEN: usize = 64;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MnemonicResponse` is never constructed
[INFO] [stdout]   --> src/mnemonic.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct MnemonicResponse<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `pbkdf2_rounds` is never read
[INFO] [stdout]   --> src/mnemonic.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Mnemonic {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 22 |     pub mnemonic: Vec<u8>,
[INFO] [stdout] 23 |     pub pbkdf2_rounds: NonZeroU32,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `DIGEST_ALG` is never used
[INFO] [stdout]   --> src/mnemonic.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | static DIGEST_ALG: &digest::Algorithm = &digest::SHA512;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_seed`, `salt`, and `to_json` are never used
[INFO] [stdout]   --> src/mnemonic.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Mnemonic {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn to_seed<S, M>(&self, mnemonic: M, seed_value: S) -> Vec<u8>
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn salt<S: AsRef<str>>(&self, username: S) -> Vec<u8> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     pub fn to_json(&self, wordslist: &[String]) -> Result<String, MnemonicError> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MnemonicError` is never used
[INFO] [stdout]    --> src/mnemonic.rs:104:10
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub enum MnemonicError {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `seed` and `mode` are never read
[INFO] [stdout]  --> src/settings.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct RuntimeSettings {
[INFO] [stdout]   |            --------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 8 |     pub seed: Option<String>,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 9 |     pub mode: Mode,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Num` is never constructed
[INFO] [stdout]   --> src/settings.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum Mode {
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] 13 |     Default,
[INFO] [stdout] 14 |     Num(u8),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/mnemonic.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(Serialize)]
[INFO] [stdout]    |          -^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `MnemonicResponse` is not local
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_MnemonicResponse`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Serialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Serialize` may come from an old version of the `serde_derive` crate, try updating your dependency with `cargo update -p serde_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/settings.rs:27:30
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(f) => panic!(f.to_string()),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(f) => panic!("{}", f.to_string()),
[INFO] [stdout]    |                              +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/mnemonic.rs:133:32
[INFO] [stdout]     |
[INFO] [stdout] 133 |             Io(ref err) => err.description(),
[INFO] [stdout]     |                                ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/mnemonic.rs:134:35
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Serde(ref err) => err.description(),
[INFO] [stdout]     |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `PBKDF2_KEY_LEN` is never used
[INFO] [stdout]   --> src/mnemonic.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | static PBKDF2_KEY_LEN: usize = 64;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MnemonicResponse` is never constructed
[INFO] [stdout]   --> src/mnemonic.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct MnemonicResponse<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `pbkdf2_rounds` is never read
[INFO] [stdout]   --> src/mnemonic.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Mnemonic {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 22 |     pub mnemonic: Vec<u8>,
[INFO] [stdout] 23 |     pub pbkdf2_rounds: NonZeroU32,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `DIGEST_ALG` is never used
[INFO] [stdout]   --> src/mnemonic.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | static DIGEST_ALG: &digest::Algorithm = &digest::SHA512;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_seed`, `salt`, and `to_json` are never used
[INFO] [stdout]   --> src/mnemonic.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Mnemonic {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn to_seed<S, M>(&self, mnemonic: M, seed_value: S) -> Vec<u8>
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn salt<S: AsRef<str>>(&self, username: S) -> Vec<u8> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     pub fn to_json(&self, wordslist: &[String]) -> Result<String, MnemonicError> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MnemonicError` is never used
[INFO] [stdout]    --> src/mnemonic.rs:104:10
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub enum MnemonicError {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `seed` and `mode` are never read
[INFO] [stdout]  --> src/settings.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct RuntimeSettings {
[INFO] [stdout]   |            --------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 8 |     pub seed: Option<String>,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 9 |     pub mode: Mode,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Num` is never constructed
[INFO] [stdout]   --> src/settings.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum Mode {
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] 13 |     Default,
[INFO] [stdout] 14 |     Num(u8),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.08s
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/mnemonic.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(Serialize)]
[INFO] [stdout]    |          -^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `MnemonicResponse` is not local
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_MnemonicResponse`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Serialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Serialize` may come from an old version of the `serde_derive` crate, try updating your dependency with `cargo update -p serde_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/settings.rs:27:30
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(f) => panic!(f.to_string()),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(f) => panic!("{}", f.to_string()),
[INFO] [stdout]    |                              +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v3.2.1, syn v0.13.10
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 9`
[INFO] running `Command { std: "docker" "inspect" "a6f649e5df1fc8434036072dd3b44590abea2d963862d47a92dd3896ea45f3f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6f649e5df1fc8434036072dd3b44590abea2d963862d47a92dd3896ea45f3f8", kill_on_drop: false }`
[INFO] [stdout] a6f649e5df1fc8434036072dd3b44590abea2d963862d47a92dd3896ea45f3f8
