[INFO] cloning repository https://github.com/yjyao/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yjyao/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyjyao%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyjyao%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6501ca2c3bd746e47e697e1dbcb10b23d623ca60
[INFO] checking yjyao/learn-rust against try#1779a8680dcd39c56ed600627cf6742ef07ed78c for pr-149045
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyjyao%2Flearn-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yjyao/learn-rust
[INFO] finished tweaking git repo https://github.com/yjyao/learn-rust
[INFO] tweaked toml for git repo https://github.com/yjyao/learn-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yjyao/learn-rust on toolchain 1779a8680dcd39c56ed600627cf6742ef07ed78c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yjyao/learn-rust 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" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert_float_eq v1.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 331de671919ba066391e281f809bb0f47d64c8622c6c845d26d7d5fba7785fec
[INFO] running `Command { std: "docker" "start" "-a" "331de671919ba066391e281f809bb0f47d64c8622c6c845d26d7d5fba7785fec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "331de671919ba066391e281f809bb0f47d64c8622c6c845d26d7d5fba7785fec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "331de671919ba066391e281f809bb0f47d64c8622c6c845d26d7d5fba7785fec", kill_on_drop: false }`
[INFO] [stdout] 331de671919ba066391e281f809bb0f47d64c8622c6c845d26d7d5fba7785fec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a8b828064aaa7250673d7e1601cb8c40ae644a8fbecd6cc16a6320f7ddfb296c
[INFO] running `Command { std: "docker" "start" "-a" "a8b828064aaa7250673d7e1601cb8c40ae644a8fbecd6cc16a6320f7ddfb296c", kill_on_drop: false }`
[INFO] [stderr]     Checking assert_float_eq v1.1.3
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:890:26
[INFO] [stdout]     |
[INFO] [stdout] 890 |     struct MetersSquared(i32);
[INFO] [stdout]     |            ------------- ^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `MetersSquared` 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: struct `Citation` is never constructed
[INFO] [stdout]     --> src/main.rs:1351:12
[INFO] [stdout]      |
[INFO] [stdout] 1351 |     struct Citation {
[INFO] [stdout]      |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]     --> src/main.rs:1906:20
[INFO] [stdout]      |
[INFO] [stdout] 1906 |         Element(T, Box<List<T>>),
[INFO] [stdout]      |         -------    ^^^^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `List` 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] 1906 -         Element(T, Box<List<T>>),
[INFO] [stdout] 1906 +         Element(T, ()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]     --> src/main.rs:2219:23
[INFO] [stdout]      |
[INFO] [stdout] 2219 |     struct Point(i32, i32);
[INFO] [stdout]      |            -----      ^^^
[INFO] [stdout]      |            |
[INFO] [stdout]      |            field in this struct
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider removing this field
[INFO] [stdout]      = note: `Point` 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/main.rs:890:26
[INFO] [stdout]     |
[INFO] [stdout] 890 |     struct MetersSquared(i32);
[INFO] [stdout]     |            ------------- ^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `MetersSquared` 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: struct `Citation` is never constructed
[INFO] [stdout]     --> src/main.rs:1351:12
[INFO] [stdout]      |
[INFO] [stdout] 1351 |     struct Citation {
[INFO] [stdout]      |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]     --> src/main.rs:1906:20
[INFO] [stdout]      |
[INFO] [stdout] 1906 |         Element(T, Box<List<T>>),
[INFO] [stdout]      |         -------    ^^^^^^^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         field in this variant
[INFO] [stdout]      |
[INFO] [stdout]      = note: `List` 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] 1906 -         Element(T, Box<List<T>>),
[INFO] [stdout] 1906 +         Element(T, ()),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]     --> src/main.rs:2219:23
[INFO] [stdout]      |
[INFO] [stdout] 2219 |     struct Point(i32, i32);
[INFO] [stdout]      |            -----      ^^^
[INFO] [stdout]      |            |
[INFO] [stdout]      |            field in this struct
[INFO] [stdout]      |
[INFO] [stdout]      = help: consider removing this field
[INFO] [stdout]      = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/main.rs:2172:29
[INFO] [stdout]      |
[INFO] [stdout] 2172 |         pub fn visit_doctor(&mut self, measurements: Measurements) -> HealthReport {
[INFO] [stdout]      |                             ^^^^^^^^^ the lifetime is elided here     ^^^^^^^^^^^^ the same lifetime is hidden 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: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 2172 |         pub fn visit_doctor(&mut self, measurements: Measurements) -> HealthReport<'_> {
[INFO] [stdout]      |                                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/main.rs:2374:26
[INFO] [stdout]      |
[INFO] [stdout] 2374 |     fn parse_field(data: &[u8]) -> Result<(Field, &[u8]), Error> {
[INFO] [stdout]      |                          ^^^^^             ^^^^^  ^^^^^ the same lifetime is elided here
[INFO] [stdout]      |                          |                 |
[INFO] [stdout]      |                          |                 the same lifetime is hidden here
[INFO] [stdout]      |                          the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 2374 |     fn parse_field(data: &[u8]) -> Result<(Field<'_>, &[u8]), Error> {
[INFO] [stdout]      |                                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/main.rs:2969:24
[INFO] [stdout]      |
[INFO] [stdout] 2969 |     fn tokenize(input: &str) -> Tokenizer {
[INFO] [stdout]      |                        ^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                        |
[INFO] [stdout]      |                        the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 2969 |     fn tokenize(input: &str) -> Tokenizer<'_> {
[INFO] [stdout]      |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.36s
[INFO] running `Command { std: "docker" "inspect" "a8b828064aaa7250673d7e1601cb8c40ae644a8fbecd6cc16a6320f7ddfb296c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8b828064aaa7250673d7e1601cb8c40ae644a8fbecd6cc16a6320f7ddfb296c", kill_on_drop: false }`
[INFO] [stdout] a8b828064aaa7250673d7e1601cb8c40ae644a8fbecd6cc16a6320f7ddfb296c
