[INFO] fetching crate fswallet 0.1.0-alpha.0...
[INFO] checking fswallet-0.1.0-alpha.0 against try#14e4661efa5acbf985e4fe564baae04683366cc1 for pr-157696
[INFO] extracting crate fswallet 0.1.0-alpha.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate fswallet 0.1.0-alpha.0
[INFO] finished tweaking crates.io crate fswallet 0.1.0-alpha.0
[INFO] tweaked toml for crates.io crate fswallet 0.1.0-alpha.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fswallet 0.1.0-alpha.0 on toolchain 14e4661efa5acbf985e4fe564baae04683366cc1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 75 packages to latest compatible versions
[INFO] [stderr]       Adding base58 v0.1.0 (available: v0.2.0)
[INFO] [stderr]       Adding cc v1.0.26 (available: v1.2.65)
[INFO] [stderr]       Adding clap v2.34.0 (available: v4.6.1)
[INFO] [stderr]       Adding hdwallet v0.2.2 (available: v0.2.5)
[INFO] [stderr]       Adding hdwallet-bitcoin v0.2.1 (available: v0.2.5)
[INFO] [stderr]       Adding hex v0.3.2 (available: v0.4.3)
[INFO] [stderr]       Adding home v0.3.4 (available: v0.5.12)
[INFO] [stderr]       Adding rand v0.6.5 (available: v0.10.1)
[INFO] [stderr]       Adding ring v0.14.6 (available: v0.17.14)
[INFO] [stderr]       Adding ripemd160 v0.8.0 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "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] 21193ea463ceb2e6147464f3521271a46f6e2e5bf2f828666356eba5aab76b48
[INFO] running `Command { std: "docker" "start" "21193ea463ceb2e6147464f3521271a46f6e2e5bf2f828666356eba5aab76b48", 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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "21193ea463ceb2e6147464f3521271a46f6e2e5bf2f828666356eba5aab76b48" "/opt/rustwide/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21193ea463ceb2e6147464f3521271a46f6e2e5bf2f828666356eba5aab76b48", 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" "21193ea463ceb2e6147464f3521271a46f6e2e5bf2f828666356eba5aab76b48" "/opt/rustwide/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling cc v1.0.26
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking memchr v2.8.2
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking untrusted v0.6.2
[INFO] [stderr]     Checking miniz_oxide v0.8.9
[INFO] [stderr]    Compiling syn v2.0.118
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking ripemd160 v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking object v0.37.3
[INFO] [stderr]     Checking base58 v0.1.0
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking serde_json v1.0.150
[INFO] [stderr]     Checking home v0.3.4
[INFO] [stderr]    Compiling secp256k1 v0.12.2
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking hdwallet v0.2.2
[INFO] [stderr]     Checking hdwallet-bitcoin v0.2.1
[INFO] [stderr]     Checking backtrace v0.3.76
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking fswallet v0.1.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::util::hex::ToHex`
[INFO] [stdout]  --> src/cli.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::util::hex::ToHex;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `App`, `Arg`, and `SubCommand`
[INFO] [stdout]  --> src/cli.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use clap::{App, Arg, ArgMatches, SubCommand};
[INFO] [stdout]   |            ^^^  ^^^              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hdwallet_bitcoin::Network as BitcoinNetwork`
[INFO] [stdout]  --> src/cli.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use hdwallet_bitcoin::Network as BitcoinNetwork;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::error`
[INFO] [stdout]  --> src/cli.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use log::error;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]   --> src/cli.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use serde::Serialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File` and `self`
[INFO] [stdout]   --> src/cli.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fs::{self, File};
[INFO] [stdout]    |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `Write`
[INFO] [stdout]   --> src/cli.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::io::{Read, Write};
[INFO] [stdout]    |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Derivation` and `KeySeed`
[INFO] [stdout]  --> src/key_manage.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Derivation, ExtendedPrivKey, KeySeed,
[INFO] [stdout]   |     ^^^^^^^^^^                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Network` and `PrivKey as BitcoinPrivKey`
[INFO] [stdout]   --> src/key_manage.rs:11:24
[INFO] [stdout]    |
[INFO] [stdout] 11 | use hdwallet_bitcoin::{Network, PrivKey as BitcoinPrivKey};
[INFO] [stdout]    |                        ^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::key::KeyFile`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::key::KeyFile;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::key_manage::KeyManage`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::key_manage::KeyManage;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::key_store::KeyStore`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::key_store::KeyStore;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::util::hex::ToHex`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::util::hex::ToHex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ExtendedPrivKey` and `KeySeed`
[INFO] [stdout]   --> src/main.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 | use hdwallet::{ExtendedPrivKey, KeySeed};
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hdwallet_bitcoin::Network as BitcoinNetwork`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use hdwallet_bitcoin::Network as BitcoinNetwork;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use serde::Serialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File` and `self`
[INFO] [stdout]   --> src/main.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::fs::{self, File};
[INFO] [stdout]    |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `Write`
[INFO] [stdout]   --> src/main.rs:19:15
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::io::{Read, Write};
[INFO] [stdout]    |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::util::hex::ToHex`
[INFO] [stdout]  --> src/cli.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::util::hex::ToHex;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `App`, `Arg`, and `SubCommand`
[INFO] [stdout]  --> src/cli.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use clap::{App, Arg, ArgMatches, SubCommand};
[INFO] [stdout]   |            ^^^  ^^^              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hdwallet_bitcoin::Network as BitcoinNetwork`
[INFO] [stdout]  --> src/cli.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use hdwallet_bitcoin::Network as BitcoinNetwork;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::error`
[INFO] [stdout]  --> src/cli.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use log::error;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]   --> src/cli.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use serde::Serialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File` and `self`
[INFO] [stdout]   --> src/cli.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::fs::{self, File};
[INFO] [stdout]    |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `Write`
[INFO] [stdout]   --> src/cli.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::io::{Read, Write};
[INFO] [stdout]    |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Derivation` and `KeySeed`
[INFO] [stdout]  --> src/key_manage.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Derivation, ExtendedPrivKey, KeySeed,
[INFO] [stdout]   |     ^^^^^^^^^^                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Network` and `PrivKey as BitcoinPrivKey`
[INFO] [stdout]   --> src/key_manage.rs:11:24
[INFO] [stdout]    |
[INFO] [stdout] 11 | use hdwallet_bitcoin::{Network, PrivKey as BitcoinPrivKey};
[INFO] [stdout]    |                        ^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::key::KeyFile`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::key::KeyFile;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::key_manage::KeyManage`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::key_manage::KeyManage;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::key_store::KeyStore`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::key_store::KeyStore;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::util::hex::ToHex`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::util::hex::ToHex;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ExtendedPrivKey` and `KeySeed`
[INFO] [stdout]   --> src/main.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 | use hdwallet::{ExtendedPrivKey, KeySeed};
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hdwallet_bitcoin::Network as BitcoinNetwork`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use hdwallet_bitcoin::Network as BitcoinNetwork;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use serde::Serialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File` and `self`
[INFO] [stdout]   --> src/main.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::fs::{self, File};
[INFO] [stdout]    |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read` and `Write`
[INFO] [stdout]   --> src/main.rs:19:15
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::io::{Read, Write};
[INFO] [stdout]    |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_matches`
[INFO] [stdout]   --> src/cli.rs:54:23
[INFO] [stdout]    |
[INFO] [stdout] 54 |         ("list", Some(sub_matches)) => match key_store.read_key_names() {
[INFO] [stdout]    |                       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/util/serde.rs:4:32
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn ser_hex<S>(data: &[u8], mut serializer: S) -> Result<S::Ok, S::Error>
[INFO] [stdout]   |                                ----^^^^^^^^^^
[INFO] [stdout]   |                                |
[INFO] [stdout]   |                                help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cli.rs:82:17
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 key_store.write_key(key, key_file);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 let _ = key_store.write_key(key, key_file);
[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/error.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Clone, Debug, Fail)]
[INFO] [stdout]   |                        ^---
[INFO] [stdout]   |                        |
[INFO] [stdout]   |                        `Fail` is not local
[INFO] [stdout]   |                        move the `impl` block outside of this constant `_DERIVE_failure_Fail_FOR_WalletError`
[INFO] [stdout] 5 | pub enum WalletError {
[INFO] [stdout]   |          ----------- `WalletError` is not local
[INFO] [stdout]   |
[INFO] [stdout]   = note: the derive macro `Fail` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]   = note: the derive macro `Fail` may come from an old version of the `failure_derive` crate, try updating your dependency with `cargo update -p failure_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 `Fail` (in Nightly builds, run with -Z macro-backtrace for more info)
[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/error.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Clone, Debug, Fail)]
[INFO] [stdout]   |                        ^---
[INFO] [stdout]   |                        |
[INFO] [stdout]   |                        `Display` is not local
[INFO] [stdout]   |                        move the `impl` block outside of this constant `_DERIVE_failure_core_fmt_Display_FOR_WalletError`
[INFO] [stdout] 5 | pub enum WalletError {
[INFO] [stdout]   |          ----------- `WalletError` is not local
[INFO] [stdout]   |
[INFO] [stdout]   = note: the derive macro `Fail` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]   = note: the derive macro `Fail` may come from an old version of the `failure_derive` crate, try updating your dependency with `cargo update -p failure_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: this warning originates in the derive macro `Fail` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sub_matches`
[INFO] [stdout]   --> src/cli.rs:54:23
[INFO] [stdout]    |
[INFO] [stdout] 54 |         ("list", Some(sub_matches)) => match key_store.read_key_names() {
[INFO] [stdout]    |                       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sub_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/util/serde.rs:4:32
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn ser_hex<S>(data: &[u8], mut serializer: S) -> Result<S::Ok, S::Error>
[INFO] [stdout]   |                                ----^^^^^^^^^^
[INFO] [stdout]   |                                |
[INFO] [stdout]   |                                help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/cli.rs:82:17
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 key_store.write_key(key, key_file);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 let _ = key_store.write_key(key, key_file);
[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/error.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Clone, Debug, Fail)]
[INFO] [stdout]   |                        ^---
[INFO] [stdout]   |                        |
[INFO] [stdout]   |                        `Fail` is not local
[INFO] [stdout]   |                        move the `impl` block outside of this constant `_DERIVE_failure_Fail_FOR_WalletError`
[INFO] [stdout] 5 | pub enum WalletError {
[INFO] [stdout]   |          ----------- `WalletError` is not local
[INFO] [stdout]   |
[INFO] [stdout]   = note: the derive macro `Fail` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]   = note: the derive macro `Fail` may come from an old version of the `failure_derive` crate, try updating your dependency with `cargo update -p failure_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 `Fail` (in Nightly builds, run with -Z macro-backtrace for more info)
[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/error.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Clone, Debug, Fail)]
[INFO] [stdout]   |                        ^---
[INFO] [stdout]   |                        |
[INFO] [stdout]   |                        `Display` is not local
[INFO] [stdout]   |                        move the `impl` block outside of this constant `_DERIVE_failure_core_fmt_Display_FOR_WalletError`
[INFO] [stdout] 5 | pub enum WalletError {
[INFO] [stdout]   |          ----------- `WalletError` is not local
[INFO] [stdout]   |
[INFO] [stdout]   = note: the derive macro `Fail` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]   = note: the derive macro `Fail` may come from an old version of the `failure_derive` crate, try updating your dependency with `cargo update -p failure_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: this warning originates in the derive macro `Fail` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.66s
[INFO] running `Command { std: "docker" "inspect" "21193ea463ceb2e6147464f3521271a46f6e2e5bf2f828666356eba5aab76b48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21193ea463ceb2e6147464f3521271a46f6e2e5bf2f828666356eba5aab76b48", kill_on_drop: false }`
[INFO] [stdout] 21193ea463ceb2e6147464f3521271a46f6e2e5bf2f828666356eba5aab76b48
