[INFO] cloning repository https://github.com/gitletH/rust-macro-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gitletH/rust-macro-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FgitletH%2Frust-macro-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FgitletH%2Frust-macro-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a85f231cb9db049557807e3ca17667f5bc4fde7
[INFO] checking gitletH/rust-macro-example/3a85f231cb9db049557807e3ca17667f5bc4fde7 against try#1f308f12738d8cc40bb23bf0c8114b37c164bb49 for pr-137268
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FgitletH%2Frust-macro-example" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gitletH/rust-macro-example on toolchain 1f308f12738d8cc40bb23bf0c8114b37c164bb49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gitletH/rust-macro-example
[INFO] finished tweaking git repo https://github.com/gitletH/rust-macro-example
[INFO] tweaked toml for git repo https://github.com/gitletH/rust-macro-example written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/gitletH/rust-macro-example 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" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking gitletH/rust-macro-example/3a85f231cb9db049557807e3ca17667f5bc4fde7 against try#1f308f12738d8cc40bb23bf0c8114b37c164bb49 for pr-137268
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FgitletH%2Frust-macro-example" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gitletH/rust-macro-example on toolchain 1f308f12738d8cc40bb23bf0c8114b37c164bb49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gitletH/rust-macro-example
[INFO] finished tweaking git repo https://github.com/gitletH/rust-macro-example
[INFO] tweaked toml for git repo https://github.com/gitletH/rust-macro-example written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/gitletH/rust-macro-example 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" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3dd40314b7223f70d7368ba07851f902b0d65c5a1cb63e37a7d9d8b3fd884262
[INFO] running `Command { std: "docker" "start" "-a" "3dd40314b7223f70d7368ba07851f902b0d65c5a1cb63e37a7d9d8b3fd884262", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3dd40314b7223f70d7368ba07851f902b0d65c5a1cb63e37a7d9d8b3fd884262", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dd40314b7223f70d7368ba07851f902b0d65c5a1cb63e37a7d9d8b3fd884262", kill_on_drop: false }`
[INFO] [stdout] 3dd40314b7223f70d7368ba07851f902b0d65c5a1cb63e37a7d9d8b3fd884262
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1f308f12738d8cc40bb23bf0c8114b37c164bb49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7d90cac206a4aab6402378a939d4d594db76dc17fc440652c249396d2d0abb2
[INFO] running `Command { std: "docker" "start" "-a" "c7d90cac206a4aab6402378a939d4d594db76dc17fc440652c249396d2d0abb2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking lib1 v0.1.0 (/opt/rustwide/workdir/lib1)
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling lib v0.1.0 (/opt/rustwide/workdir/lib)
[INFO] [stdout] warning: unused imports: `Error` and `parse_quote`
[INFO] [stdout]  --> lib/src/lib.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | use syn::{parse_quote, Error, parse_macro_input, DeriveInput, Data};
[INFO] [stdout]   |           ^^^^^^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attr`
[INFO] [stdout]   --> lib/src/lib.rs:55:25
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn AssertReturnSync(attr: TokenStream, item: TokenStream) -> TokenStream {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_attr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `AssertReturnSync` should have a snake case name
[INFO] [stdout]   --> lib/src/lib.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn AssertReturnSync(attr: TokenStream, item: TokenStream) -> TokenStream {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `assert_return_sync`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] TokenStream [
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "const",
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "_",
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ':',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "fn",
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout] TokenStream [
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]     Group {
[INFO] [stdout]         ident: "const",
[INFO] [stdout]         delimiter: Parenthesis,
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "_",
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ':',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "fn",
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]     Group {
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '=',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '|',
[INFO] [stdout]         spacing: Joint,
[INFO] [stdout]         span: #0 bytes(692..693),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '|',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(693..694),
[INFO] [stdout]     },
[INFO] [stdout]     Group {
[INFO] [stdout]         delimiter: Brace,
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ';',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         delimiter: Parenthesis,
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout] ]
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '=',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '|',
[INFO] [stdout]         spacing: Joint,
[INFO] [stdout]         span: #0 bytes(692..693),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '|',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(693..694),
[INFO] [stdout]     },
[INFO] [stdout]     Group {
[INFO] [stdout]         delimiter: Brace,
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ';',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(692..694),
[INFO] [stdout]     },
[INFO] [stdout] ]
[INFO] [stdout] TokenStream [
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "const",
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "_",
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ':',
[INFO] [stdout] TokenStream [
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "const",
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]     Ident {
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]         ident: "_",
[INFO] [stdout]     },
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "fn",
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     Group {
[INFO] [stdout]         delimiter: Parenthesis,
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ':',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '=',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]         ch: '|',
[INFO] [stdout]     },
[INFO] [stdout]         spacing: Joint,
[INFO] [stdout]     Ident {
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]         ident: "fn",
[INFO] [stdout]     },
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     Punct {
[INFO] [stdout]     },
[INFO] [stdout]         ch: '|',
[INFO] [stdout]     Group {
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         delimiter: Parenthesis,
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]     },
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     Group {
[INFO] [stdout]     },
[INFO] [stdout]         delimiter: Brace,
[INFO] [stdout]     Punct {
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         ch: '=',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ';',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout] ]
[INFO] [stdout] TokenStream [
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "const",
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]         ch: '|',
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "_",
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         spacing: Joint,
[INFO] [stdout]         ch: ':',
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "fn",
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]         ch: '|',
[INFO] [stdout]     Group {
[INFO] [stdout]         delimiter: Parenthesis,
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '=',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '|',
[INFO] [stdout]         spacing: Joint,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '|',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Group {
[INFO] [stdout]         delimiter: Brace,
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ';',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout] ]
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     Group {
[INFO] [stdout]         delimiter: Brace,
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ';',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(703..707),
[INFO] [stdout]     },
[INFO] [stdout] ]
[INFO] [stdout] TokenStream [
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "const",
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "_",
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ':',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Ident {
[INFO] [stdout]         ident: "fn",
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Group {
[INFO] [stdout]         delimiter: Parenthesis,
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '=',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '|',
[INFO] [stdout]         spacing: Joint,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: '|',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Group {
[INFO] [stdout]         delimiter: Brace,
[INFO] [stdout]         stream: TokenStream [],
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout]     Punct {
[INFO] [stdout]         ch: ';',
[INFO] [stdout]         spacing: Alone,
[INFO] [stdout]         span: #0 bytes(716..723),
[INFO] [stdout]     },
[INFO] [stdout] ]
[INFO] [stdout] warning: fields `a`, `b`, and `c` are never read
[INFO] [stdout]   --> src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Foo {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 43 |     a: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 44 |     b: bool,
[INFO] [stdout]    |     ^
[INFO] [stdout] 45 |     c: Vec<u8>,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a`, `b`, and `c` are never read
[INFO] [stdout]   --> src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct Foo {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 43 |     a: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 44 |     b: bool,
[INFO] [stdout]    |     ^
[INFO] [stdout] 45 |     c: Vec<u8>,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.89s
[INFO] running `Command { std: "docker" "inspect" "c7d90cac206a4aab6402378a939d4d594db76dc17fc440652c249396d2d0abb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7d90cac206a4aab6402378a939d4d594db76dc17fc440652c249396d2d0abb2", kill_on_drop: false }`
[INFO] [stdout] c7d90cac206a4aab6402378a939d4d594db76dc17fc440652c249396d2d0abb2