[INFO] fetching crate tusk 0.0.1...
[INFO] checking tusk-0.0.1 against master#029c9e18dd1f4668e1d42bb187c1c263dfe20093 for pr-157562
[INFO] extracting crate tusk 0.0.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate tusk 0.0.1
[INFO] finished tweaking crates.io crate tusk 0.0.1
[INFO] tweaked toml for crates.io crate tusk 0.0.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tusk 0.0.1 on toolchain 029c9e18dd1f4668e1d42bb187c1c263dfe20093
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+029c9e18dd1f4668e1d42bb187c1c263dfe20093" "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" "+029c9e18dd1f4668e1d42bb187c1c263dfe20093" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+029c9e18dd1f4668e1d42bb187c1c263dfe20093" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5cf1f1e3eedb9991bd27bfd8a62aadc2cd0295e0f3256901dbf0dae966787017
[INFO] running `Command { std: "docker" "start" "5cf1f1e3eedb9991bd27bfd8a62aadc2cd0295e0f3256901dbf0dae966787017", 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" "5cf1f1e3eedb9991bd27bfd8a62aadc2cd0295e0f3256901dbf0dae966787017" "/opt/rustwide/cargo-home/bin/cargo" "+029c9e18dd1f4668e1d42bb187c1c263dfe20093" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5cf1f1e3eedb9991bd27bfd8a62aadc2cd0295e0f3256901dbf0dae966787017", 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" "5cf1f1e3eedb9991bd27bfd8a62aadc2cd0295e0f3256901dbf0dae966787017" "/opt/rustwide/cargo-home/bin/cargo" "+029c9e18dd1f4668e1d42bb187c1c263dfe20093" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking aes-gcm v0.8.0
[INFO] [stderr]     Checking v_escape v0.7.4
[INFO] [stderr]     Checking crossbeam-deque v0.8.6
[INFO] [stderr]     Checking hkdf v0.10.0
[INFO] [stderr]     Checking rand v0.8.6
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]    Compiling actix-web v0.7.19
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking tower-service v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling actix_derive v0.3.2
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking regex v1.12.4
[INFO] [stderr]     Checking sha1_smol v1.0.1
[INFO] [stderr]     Checking percent-encoding v2.3.2
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]     Checking mime v0.3.17
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking cookie v0.11.5
[INFO] [stderr]     Checking sha1 v0.6.1
[INFO] [stderr]     Checking flate2 v1.1.9
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking actix v0.7.9
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking csv-core v0.1.13
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking csv v1.4.0
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking actix-net v0.2.6
[INFO] [stderr]     Checking rayon v1.12.0
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking brotli2 v0.3.2
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]     Checking tusk v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/tusk/mod.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |         /// Load the agent
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 58 |         let reader = File::open(&master_config_file_buf)?;
[INFO] [stdout]    |         -------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/tusk/mod.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |         /// Load the agent
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 58 |         let reader = File::open(&master_config_file_buf)?;
[INFO] [stdout]    |         -------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/plugins/inputs/mod.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             _ => unimplemented!(),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/plugins/inputs/mod.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             InputFormat::JSON => serde_json::from_reader(input)?,
[INFO] [stdout]    |             ----------------- matches some of the same values
[INFO] [stdout] 61 |             InputFormat::YAML => serde_yaml::from_reader(input)?,
[INFO] [stdout]    |             ----------------- matches some of the same values
[INFO] [stdout] 62 |             InputFormat::Bincode => bincode::deserialize_from(input)?,
[INFO] [stdout]    |             -------------------- matches some of the same values
[INFO] [stdout] 63 |             _ => unimplemented!(),
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/plugins/outputs/mod.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             _ => unimplemented!(),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/plugins/outputs/mod.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             OutputFormat::JSON => serde_json::to_writer(output, &readings)?,
[INFO] [stdout]    |             ------------------ matches some of the same values
[INFO] [stdout] 47 |             OutputFormat::YAML => serde_yaml::to_writer(output, &readings)?,
[INFO] [stdout]    |             ------------------ matches some of the same values
[INFO] [stdout] 48 |             OutputFormat::Bincode => bincode::serialize_into(output, &readings)?,
[INFO] [stdout]    |             --------------------- matches some of the same values
[INFO] [stdout] 49 |             _ => unimplemented!(),
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/plugins/inputs/mod.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             _ => unimplemented!(),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/plugins/inputs/mod.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             InputFormat::JSON => serde_json::from_reader(input)?,
[INFO] [stdout]    |             ----------------- matches some of the same values
[INFO] [stdout] 61 |             InputFormat::YAML => serde_yaml::from_reader(input)?,
[INFO] [stdout]    |             ----------------- matches some of the same values
[INFO] [stdout] 62 |             InputFormat::Bincode => bincode::deserialize_from(input)?,
[INFO] [stdout]    |             -------------------- matches some of the same values
[INFO] [stdout] 63 |             _ => unimplemented!(),
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/plugins/outputs/mod.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             _ => unimplemented!(),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/plugins/outputs/mod.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             OutputFormat::JSON => serde_json::to_writer(output, &readings)?,
[INFO] [stdout]    |             ------------------ matches some of the same values
[INFO] [stdout] 47 |             OutputFormat::YAML => serde_yaml::to_writer(output, &readings)?,
[INFO] [stdout]    |             ------------------ matches some of the same values
[INFO] [stdout] 48 |             OutputFormat::Bincode => bincode::serialize_into(output, &readings)?,
[INFO] [stdout]    |             --------------------- matches some of the same values
[INFO] [stdout] 49 |             _ => unimplemented!(),
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/tusk/mod.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn default() -> Self {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] ...
[INFO] [stdout] 44 |             ..Default::default()
[INFO] [stdout]    |               ------------------ recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `wrapped`, `filter`, `tags`, and `dimensions` are never read
[INFO] [stdout]   --> src/tusk/wrapper.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Wrapper<P> {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 11 |     wrapped: P,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     filter: Option<filter::Filter>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 16 |     #[serde(default)]
[INFO] [stdout] 17 |     tags: Vec<Tag>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     #[serde(default)]
[INFO] [stdout] 19 |     dimensions: Dimensions,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Wrapper` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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/plugins/mod.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(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_PluginError`
[INFO] [stdout] 14 | pub enum PluginError {
[INFO] [stdout]    |          ----------- `PluginError` 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/plugins/mod.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(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_PluginError`
[INFO] [stdout] 14 | pub enum PluginError {
[INFO] [stdout]    |          ----------- `PluginError` 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 `Result` that must be used
[INFO] [stdout]   --> src/plugins/outputs/stdout.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 | /         self.format
[INFO] [stdout] 17 | |             .to_writer(BufWriter::new(io::stdout()), &readings);
[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] 16 |         let _ = self.format
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/tusk/mod.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn default() -> Self {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] ...
[INFO] [stdout] 44 |             ..Default::default()
[INFO] [stdout]    |               ------------------ recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `wrapped`, `filter`, `tags`, and `dimensions` are never read
[INFO] [stdout]   --> src/tusk/wrapper.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Wrapper<P> {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 11 |     wrapped: P,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     filter: Option<filter::Filter>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 16 |     #[serde(default)]
[INFO] [stdout] 17 |     tags: Vec<Tag>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     #[serde(default)]
[INFO] [stdout] 19 |     dimensions: Dimensions,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Wrapper` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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/plugins/mod.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(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_PluginError`
[INFO] [stdout] 14 | pub enum PluginError {
[INFO] [stdout]    |          ----------- `PluginError` 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/plugins/mod.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(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_PluginError`
[INFO] [stdout] 14 | pub enum PluginError {
[INFO] [stdout]    |          ----------- `PluginError` 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 `Result` that must be used
[INFO] [stdout]   --> src/plugins/outputs/stdout.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 | /         self.format
[INFO] [stdout] 17 | |             .to_writer(BufWriter::new(io::stdout()), &readings);
[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] 16 |         let _ = self.format
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 54.77s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.2.11, nom v4.2.3, v_htmlescape v0.4.5
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "5cf1f1e3eedb9991bd27bfd8a62aadc2cd0295e0f3256901dbf0dae966787017", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cf1f1e3eedb9991bd27bfd8a62aadc2cd0295e0f3256901dbf0dae966787017", kill_on_drop: false }`
[INFO] [stdout] 5cf1f1e3eedb9991bd27bfd8a62aadc2cd0295e0f3256901dbf0dae966787017
