[INFO] cloning repository https://github.com/mmmpa/treeer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mmmpa/treeer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmmpa%2Ftreeer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmmpa%2Ftreeer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] df131f871c0e09b8d4baae8912c033d079809288
[INFO] checking mmmpa/treeer against 895980e0290783bb09b1ccf1b11f14eb09b10430 for pr-160186
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmmpa%2Ftreeer" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/mmmpa/treeer
[INFO] finished tweaking git repo https://github.com/mmmpa/treeer
[INFO] tweaked toml for git repo https://github.com/mmmpa/treeer written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mmmpa/treeer on toolchain 895980e0290783bb09b1ccf1b11f14eb09b10430
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mmmpa/treeer 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" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5
[INFO] running `Command { std: "docker" "start" "77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5", 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" "77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5", 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" "77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking json v0.12.1
[INFO] [stderr]     Checking treeer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `errors` is never read
[INFO] [stdout]  --> src/treeer/errors.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct TreeerErr {
[INFO] [stdout]   |            --------- field in this struct
[INFO] [stdout] 6 |     errors: Errors
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TreeerErr` has a derived impl for the trait `Debug`, 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: field `0` is never read
[INFO] [stdout]   --> src/treeer/errors.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     IoError(std::io::Error),
[INFO] [stdout]    |     ------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Errors` 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] 16 -     IoError(std::io::Error),
[INFO] [stdout] 16 +     IoError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treeer/errors.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 17 |     FromUtf8Error(std::string::FromUtf8Error),
[INFO] [stdout]    |     ------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Errors` 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] 17 -     FromUtf8Error(std::string::FromUtf8Error),
[INFO] [stdout] 17 +     FromUtf8Error(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_mut` is never used
[INFO] [stdout]   --> src/treeer/tag.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait Tag: Debug + 'static + StateAccessor + Sized {
[INFO] [stdout]    |           --- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn set_mut<M: Modifier<State>>(&mut self, m: M) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]  --> src/treeer/attr_helpers.rs:3:39
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn class<'a>(v: &'a [&'a str]) -> Class { Class(v) }
[INFO] [stdout]   |                      --   --          ^^^^^ the same lifetime is hidden here
[INFO] [stdout]   |                      |    |
[INFO] [stdout]   |                      |    the lifetime is named here
[INFO] [stdout]   |                      the lifetime is named here
[INFO] [stdout]   |
[INFO] [stdout]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn class<'a>(v: &'a [&'a str]) -> Class<'a> { Class(v) }
[INFO] [stdout]   |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `errors` is never read
[INFO] [stdout]  --> src/treeer/errors.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct TreeerErr {
[INFO] [stdout]   |            --------- field in this struct
[INFO] [stdout] 6 |     errors: Errors
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TreeerErr` has a derived impl for the trait `Debug`, 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: field `0` is never read
[INFO] [stdout]   --> src/treeer/errors.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     IoError(std::io::Error),
[INFO] [stdout]    |     ------- ^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Errors` 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] 16 -     IoError(std::io::Error),
[INFO] [stdout] 16 +     IoError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treeer/errors.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 17 |     FromUtf8Error(std::string::FromUtf8Error),
[INFO] [stdout]    |     ------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Errors` 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] 17 -     FromUtf8Error(std::string::FromUtf8Error),
[INFO] [stdout] 17 +     FromUtf8Error(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_mut` is never used
[INFO] [stdout]   --> src/treeer/tag.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub trait Tag: Debug + 'static + StateAccessor + Sized {
[INFO] [stdout]    |           --- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn set_mut<M: Modifier<State>>(&mut self, m: M) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]  --> src/treeer/attr_helpers.rs:3:39
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn class<'a>(v: &'a [&'a str]) -> Class { Class(v) }
[INFO] [stdout]   |                      --   --          ^^^^^ the same lifetime is hidden here
[INFO] [stdout]   |                      |    |
[INFO] [stdout]   |                      |    the lifetime is named here
[INFO] [stdout]   |                      the lifetime is named here
[INFO] [stdout]   |
[INFO] [stdout]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn class<'a>(v: &'a [&'a str]) -> Class<'a> { Class(v) }
[INFO] [stdout]   |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5", kill_on_drop: false }`
[INFO] [stdout] 77c3e3a43644d55cd736184e90ce05d1b8a4a8695c9e63ac0e70adaf373f9ad5
