[INFO] cloning repository https://github.com/KillingSpark/sessionman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KillingSpark/sessionman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKillingSpark%2Fsessionman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKillingSpark%2Fsessionman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 949ba0db3f7142241451a826941a291ae785766e
[INFO] checking KillingSpark/sessionman against eca445e5ae4a6679cc27d3a09106ce245e13a5a6 for pr-162478
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKillingSpark%2Fsessionman" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/KillingSpark/sessionman
[INFO] finished tweaking git repo https://github.com/KillingSpark/sessionman
[INFO] tweaked toml for git repo https://github.com/KillingSpark/sessionman written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/KillingSpark/sessionman on toolchain eca445e5ae4a6679cc27d3a09106ce245e13a5a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "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" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to highest compatible versions
[INFO] [stderr]       Adding nix v0.26.4 (available: v0.31.3)
[INFO] [stderr]       Adding rustbus v0.3.2 (available: v0.19.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded acl-rs v0.1.1
[INFO] [stderr]   Downloaded rustbus v0.3.2
[INFO] [stderr]   Downloaded acl-sys v1.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736
[INFO] running `Command { std: "docker" "start" "b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736", 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" "b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736", 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" "b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736" "/opt/rustwide/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]     Checking acl-sys v1.2.2
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]     Checking rustbus v0.3.2
[INFO] [stderr]     Checking acl-rs v0.1.1
[INFO] [stderr]     Checking sessionman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 14 |
[INFO] [stdout] 15 |     let mut sesman = session::SessionManager::new().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 14 |
[INFO] [stdout] 15 |     let mut sesman = session::SessionManager::new().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FREEZE_FILE_NAME` is never used
[INFO] [stdout]  --> src/cgroupv2.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const FREEZE_FILE_NAME: &'static str = "cgroup.freeze";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cgroupv2.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |     IoError(std::io::Error),
[INFO] [stdout]    |     ------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 28 -     IoError(std::io::Error),
[INFO] [stdout] 28 +     IoError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cgroupv2.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |     CantCreate(std::io::Error),
[INFO] [stdout]    |     ---------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 30 -     CantCreate(std::io::Error),
[INFO] [stdout] 30 +     CantCreate(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cgroupv2.rs:31:21
[INFO] [stdout]    |
[INFO] [stdout] 31 |     InvalidPidEntry(String),
[INFO] [stdout]    |     --------------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 31 -     InvalidPidEntry(String),
[INFO] [stdout] 31 +     InvalidPidEntry(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `freeze` and `thaw` are never used
[INFO] [stdout]    --> src/cgroupv2.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout]  46 | impl Cgroup {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub fn freeze(&mut self) -> Result<(), Error> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |     pub fn thaw(&mut self) -> Result<(), Error> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/seat.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Seat {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 11 |     pub id: SeatId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Seat` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `seat_tag` is never read
[INFO] [stdout]   --> src/seat.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Device {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 23 |     pub dev_name: PathBuf,
[INFO] [stdout] 24 |     pub seat_tag: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Device` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `IoError` is never constructed
[INFO] [stdout]   --> src/seat.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub enum Error {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 29 |     IoError(std::io::Error),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `cgroup` are never read
[INFO] [stdout]   --> src/session.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Session {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 29 |     id: SessionId,
[INFO] [stdout] 30 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     cgroup: cgroupv2::Cgroup,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Session` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:38:24
[INFO] [stdout]    |
[INFO] [stdout] 38 |     SessionExistsOnTTY(String),
[INFO] [stdout]    |     ------------------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 38 -     SessionExistsOnTTY(String),
[INFO] [stdout] 38 +     SessionExistsOnTTY(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:39:22
[INFO] [stdout]    |
[INFO] [stdout] 39 |     CantCreateCgroup(cgroupv2::Error),
[INFO] [stdout]    |     ---------------- ^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 39 -     CantCreateCgroup(cgroupv2::Error),
[INFO] [stdout] 39 +     CantCreateCgroup(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |     CantMoveCgroup(cgroupv2::Error),
[INFO] [stdout]    |     -------------- ^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 40 -     CantMoveCgroup(cgroupv2::Error),
[INFO] [stdout] 40 +     CantMoveCgroup(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     SeatTaken(SessionId),
[INFO] [stdout]    |     --------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AquireError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 45 -     SeatTaken(SessionId),
[INFO] [stdout] 45 +     SeatTaken(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |     UnknownSeat(seat::SeatId),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AquireError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 46 -     UnknownSeat(seat::SeatId),
[INFO] [stdout] 46 +     UnknownSeat(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FREEZE_FILE_NAME` is never used
[INFO] [stdout]  --> src/cgroupv2.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const FREEZE_FILE_NAME: &'static str = "cgroup.freeze";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cgroupv2.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |     IoError(std::io::Error),
[INFO] [stdout]    |     ------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 28 -     IoError(std::io::Error),
[INFO] [stdout] 28 +     IoError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cgroupv2.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |     CantCreate(std::io::Error),
[INFO] [stdout]    |     ---------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 30 -     CantCreate(std::io::Error),
[INFO] [stdout] 30 +     CantCreate(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cgroupv2.rs:31:21
[INFO] [stdout]    |
[INFO] [stdout] 31 |     InvalidPidEntry(String),
[INFO] [stdout]    |     --------------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 31 -     InvalidPidEntry(String),
[INFO] [stdout] 31 +     InvalidPidEntry(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `freeze` and `thaw` are never used
[INFO] [stdout]    --> src/cgroupv2.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout]  46 | impl Cgroup {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub fn freeze(&mut self) -> Result<(), Error> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |     pub fn thaw(&mut self) -> Result<(), Error> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/seat.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Seat {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 11 |     pub id: SeatId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Seat` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `seat_tag` is never read
[INFO] [stdout]   --> src/seat.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Device {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 23 |     pub dev_name: PathBuf,
[INFO] [stdout] 24 |     pub seat_tag: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Device` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `IoError` is never constructed
[INFO] [stdout]   --> src/seat.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub enum Error {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 29 |     IoError(std::io::Error),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `cgroup` are never read
[INFO] [stdout]   --> src/session.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Session {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 29 |     id: SessionId,
[INFO] [stdout] 30 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     cgroup: cgroupv2::Cgroup,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Session` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:38:24
[INFO] [stdout]    |
[INFO] [stdout] 38 |     SessionExistsOnTTY(String),
[INFO] [stdout]    |     ------------------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 38 -     SessionExistsOnTTY(String),
[INFO] [stdout] 38 +     SessionExistsOnTTY(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:39:22
[INFO] [stdout]    |
[INFO] [stdout] 39 |     CantCreateCgroup(cgroupv2::Error),
[INFO] [stdout]    |     ---------------- ^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 39 -     CantCreateCgroup(cgroupv2::Error),
[INFO] [stdout] 39 +     CantCreateCgroup(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |     CantMoveCgroup(cgroupv2::Error),
[INFO] [stdout]    |     -------------- ^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 40 -     CantMoveCgroup(cgroupv2::Error),
[INFO] [stdout] 40 +     CantMoveCgroup(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     SeatTaken(SessionId),
[INFO] [stdout]    |     --------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AquireError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 45 -     SeatTaken(SessionId),
[INFO] [stdout] 45 +     SeatTaken(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |     UnknownSeat(seat::SeatId),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AquireError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 46 -     UnknownSeat(seat::SeatId),
[INFO] [stdout] 46 +     UnknownSeat(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:47:20
[INFO] [stdout]    |
[INFO] [stdout] 47 |     UnknownSession(SessionId),
[INFO] [stdout]    |     -------------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AquireError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 47 -     UnknownSession(SessionId),
[INFO] [stdout] 47 +     UnknownSession(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:44:19
[INFO] [stdout]    |
[INFO] [stdout] 44 |         for ev in inotify.read_events() {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 44 -         for ev in inotify.read_events() {
[INFO] [stdout] 44 +         while let Ok(ev) = inotify.read_events() {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 44 -         for ev in inotify.read_events() {
[INFO] [stdout] 44 +         if let Ok(ev) = inotify.read_events() {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/session.rs:47:20
[INFO] [stdout]    |
[INFO] [stdout] 47 |     UnknownSession(SessionId),
[INFO] [stdout]    |     -------------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AquireError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 47 -     UnknownSession(SessionId),
[INFO] [stdout] 47 +     UnknownSession(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/main.rs:44:19
[INFO] [stdout]    |
[INFO] [stdout] 44 |         for ev in inotify.read_events() {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 44 -         for ev in inotify.read_events() {
[INFO] [stdout] 44 +         while let Ok(ev) = inotify.read_events() {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 44 -         for ev in inotify.read_events() {
[INFO] [stdout] 44 +         if let Ok(ev) = inotify.read_events() {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/session.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |             self.session_aquire_seat(&session_id, &"seat0".into());
[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] 89 |             let _ = self.session_aquire_seat(&session_id, &"seat0".into());
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/session.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |             self.session_leave_seat(session_id, &seat_id);
[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] 95 |             let _ = self.session_leave_seat(session_id, &seat_id);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/session.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |             self.session_aquire_seat(&session_id, &"seat0".into());
[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] 89 |             let _ = self.session_aquire_seat(&session_id, &"seat0".into());
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/session.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |             self.session_leave_seat(session_id, &seat_id);
[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] 95 |             let _ = self.session_leave_seat(session_id, &seat_id);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.86s
[INFO] running `Command { std: "docker" "inspect" "b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736", kill_on_drop: false }`
[INFO] [stdout] b9604f9889c8ca4e24960a9b164d963ffe5f807c09713e8b7fcc636c5e4f2736
