[INFO] cloning repository https://github.com/yzyDavid/YBase
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yzyDavid/YBase" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FyzyDavid%2FYBase", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FyzyDavid%2FYBase'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ff6c15216bafcfe6da83c1683fb7178d9e6926b
[INFO] checking yzyDavid/YBase against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FyzyDavid%2FYBase" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yzyDavid/YBase
[INFO] finished tweaking git repo https://github.com/yzyDavid/YBase
[INFO] tweaked toml for git repo https://github.com/yzyDavid/YBase written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yzyDavid/YBase on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yzyDavid/YBase 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 377f992f22df0f134a3776875df753ddc6b8ef8fc2c3865ccceb61b685995762
[INFO] running `Command { std: "docker" "start" "-a" "377f992f22df0f134a3776875df753ddc6b8ef8fc2c3865ccceb61b685995762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "377f992f22df0f134a3776875df753ddc6b8ef8fc2c3865ccceb61b685995762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "377f992f22df0f134a3776875df753ddc6b8ef8fc2c3865ccceb61b685995762", kill_on_drop: false }`
[INFO] [stdout] 377f992f22df0f134a3776875df753ddc6b8ef8fc2c3865ccceb61b685995762
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1be85961bdade09eac6bc6537bc68283ab8dfd843686bcd0c35084ccee2b72f3
[INFO] running `Command { std: "docker" "start" "-a" "1be85961bdade09eac6bc6537bc68283ab8dfd843686bcd0c35084ccee2b72f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]     Checking ucd-util v0.1.5
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking humantime v1.2.0
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking rand_core v0.3.1
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[INFO] [stderr]     Checking regex-syntax v0.6.10
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking regex v1.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking ybase v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::collections::HashMap;
[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 import: `std::thread::current`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::thread::current;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Serialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` 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: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:19:21
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Deserialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: this warning originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Serialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[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: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Deserialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: this warning originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Serialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[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: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Deserialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: this warning originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::collections::HashMap;
[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 import: `std::thread::current`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::thread::current;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Serialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` 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: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:19:21
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Deserialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: this warning originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Serialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[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: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Deserialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: this warning originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Serialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[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: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = note: using a cfg inside a derive macro will use the cfgs from the destination crate and not the ones from the defining crate
[INFO] [stdout]    = help: try referring to `Deserialize` crate for guidance on how handle this unexpected cfg
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: this warning originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `os_string`
[INFO] [stdout]   --> src/error.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn from(os_string: std::ffi::OsString) -> Self {
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_os_string`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Record` is never constructed
[INFO] [stdout]  --> src/nexus/value.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Record(u64, Vec<Value>);
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/nexus/value.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Record(u64, Vec<Value>);
[INFO] [stdout]   |            ------ ^^^  ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `meta_path` and `context` are never read
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct FixMapStorageEngine {
[INFO] [stdout]    |            ------------------- fields in this struct
[INFO] [stdout] 47 |     meta_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 48 |     meta: Meta,
[INFO] [stdout] 49 |     context: RuntimeContext,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `alloc_page` and `sync_meta` are never used
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | impl FixMapStorageEngine {
[INFO] [stdout]    | ------------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |     fn alloc_page(&mut self) -> Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 |     fn sync_meta(&self) {
[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/storage/fixmap/engine.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^--------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_FieldDef`
[INFO] [stdout] 20 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 21 | struct FieldDef {
[INFO] [stdout]    |        -------- `FieldDef` is not local
[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: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:19:21
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^----------
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     `Deserialize` is not local
[INFO] [stdout]    |                     move the `impl` block outside of this constant `_IMPL_DESERIALIZE_FOR_FieldDef`
[INFO] [stdout] 20 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 21 | struct FieldDef {
[INFO] [stdout]    |        -------- `FieldDef` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Deserialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Deserialize` 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: this warning originates in the derive macro `Deserialize` (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/storage/fixmap/engine.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^--------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_Schema`
[INFO] [stdout] 27 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 28 | pub struct Schema {
[INFO] [stdout]    |            ------ `Schema` is not local
[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: 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: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^----------
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     `Deserialize` is not local
[INFO] [stdout]    |                     move the `impl` block outside of this constant `_IMPL_DESERIALIZE_FOR_Schema`
[INFO] [stdout] 27 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 28 | pub struct Schema {
[INFO] [stdout]    |            ------ `Schema` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Deserialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Deserialize` 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: this warning originates in the derive macro `Deserialize` (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/storage/fixmap/engine.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^--------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_Meta`
[INFO] [stdout] 33 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 34 | pub struct Meta {
[INFO] [stdout]    |            ---- `Meta` is not local
[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: 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: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^----------
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     `Deserialize` is not local
[INFO] [stdout]    |                     move the `impl` block outside of this constant `_IMPL_DESERIALIZE_FOR_Meta`
[INFO] [stdout] 33 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 34 | pub struct Meta {
[INFO] [stdout]    |            ---- `Meta` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Deserialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Deserialize` 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: this warning originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         self.mmap_file(&page_path);
[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] 63 |         let _ = self.mmap_file(&page_path);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |         serde_json::to_string(&self.meta);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 94 |         let _ = serde_json::to_string(&self.meta);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/storage/fixmap/engine.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |             self.mmap_file(&page_path);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 108 |             let _ = self.mmap_file(&page_path);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `os_string`
[INFO] [stdout]   --> src/error.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn from(os_string: std::ffi::OsString) -> Self {
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_os_string`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Record` is never constructed
[INFO] [stdout]  --> src/nexus/value.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Record(u64, Vec<Value>);
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/nexus/value.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Record(u64, Vec<Value>);
[INFO] [stdout]   |            ------ ^^^  ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `meta_path` and `context` are never read
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct FixMapStorageEngine {
[INFO] [stdout]    |            ------------------- fields in this struct
[INFO] [stdout] 47 |     meta_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 48 |     meta: Meta,
[INFO] [stdout] 49 |     context: RuntimeContext,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `alloc_page` and `sync_meta` are never used
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | impl FixMapStorageEngine {
[INFO] [stdout]    | ------------------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |     fn alloc_page(&mut self) -> Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 |     fn sync_meta(&self) {
[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/storage/fixmap/engine.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^--------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_FieldDef`
[INFO] [stdout] 20 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 21 | struct FieldDef {
[INFO] [stdout]    |        -------- `FieldDef` is not local
[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: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:19:21
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^----------
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     `Deserialize` is not local
[INFO] [stdout]    |                     move the `impl` block outside of this constant `_IMPL_DESERIALIZE_FOR_FieldDef`
[INFO] [stdout] 20 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 21 | struct FieldDef {
[INFO] [stdout]    |        -------- `FieldDef` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Deserialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Deserialize` 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: this warning originates in the derive macro `Deserialize` (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/storage/fixmap/engine.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^--------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_Schema`
[INFO] [stdout] 27 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 28 | pub struct Schema {
[INFO] [stdout]    |            ------ `Schema` is not local
[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: 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: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:26:21
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^----------
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     `Deserialize` is not local
[INFO] [stdout]    |                     move the `impl` block outside of this constant `_IMPL_DESERIALIZE_FOR_Schema`
[INFO] [stdout] 27 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 28 | pub struct Schema {
[INFO] [stdout]    |            ------ `Schema` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Deserialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Deserialize` 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: this warning originates in the derive macro `Deserialize` (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/storage/fixmap/engine.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |          ^--------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Serialize` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_IMPL_SERIALIZE_FOR_Meta`
[INFO] [stdout] 33 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 34 | pub struct Meta {
[INFO] [stdout]    |            ---- `Meta` is not local
[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: 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: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 | #[derive(Serialize, Deserialize, Debug)]
[INFO] [stdout]    |                     ^----------
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     `Deserialize` is not local
[INFO] [stdout]    |                     move the `impl` block outside of this constant `_IMPL_DESERIALIZE_FOR_Meta`
[INFO] [stdout] 33 | #[serde(deny_unknown_fields)]
[INFO] [stdout] 34 | pub struct Meta {
[INFO] [stdout]    |            ---- `Meta` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `Deserialize` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `Deserialize` 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: this warning originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         self.mmap_file(&page_path);
[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] 63 |         let _ = self.mmap_file(&page_path);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/storage/fixmap/engine.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |         serde_json::to_string(&self.meta);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 94 |         let _ = serde_json::to_string(&self.meta);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/storage/fixmap/engine.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |             self.mmap_file(&page_path);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 108 |             let _ = self.mmap_file(&page_path);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ybase` (lib test) due to 1 previous error; 21 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `ybase` (lib) due to 1 previous error; 21 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1be85961bdade09eac6bc6537bc68283ab8dfd843686bcd0c35084ccee2b72f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1be85961bdade09eac6bc6537bc68283ab8dfd843686bcd0c35084ccee2b72f3", kill_on_drop: false }`
[INFO] [stdout] 1be85961bdade09eac6bc6537bc68283ab8dfd843686bcd0c35084ccee2b72f3
