[INFO] fetching crate prologue_logger 0.1.0...
[INFO] checking prologue_logger-0.1.0 against f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1 for pr-160235-1
[INFO] extracting crate prologue_logger 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate prologue_logger 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate prologue_logger 0.1.0
[INFO] tweaked toml for crates.io crate prologue_logger 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate prologue_logger 0.1.0 on toolchain f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate prologue_logger 0.1.0 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" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: explicit `package.readme` can be inferred
[INFO] [stderr]   --> Cargo.toml:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | readme = "README.md"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::manual_readme` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.readme`
[INFO] [stderr] warning: `prologue_logger` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0
[INFO] running `Command { std: "docker" "start" "bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0", 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" "bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0" "/opt/rustwide/cargo-home/bin/cargo" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0", 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" "bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0" "/opt/rustwide/cargo-home/bin/cargo" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: explicit `package.readme` can be inferred
[INFO] [stderr]   --> Cargo.toml:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | readme = "README.md"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::manual_readme` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.readme`
[INFO] [stderr] warning: `prologue_logger` (manifest) generated 1 warning
[INFO] [stderr]     Checking prologue_logger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: named argument `len` is not used by name
[INFO] [stdout]   --> src/internals.rs:36:47
[INFO] [stdout]    |
[INFO] [stdout] 36 |             StyledObject(format!("{: >len$}", len = len))
[INFO] [stdout]    |                                   ---------   ^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]    |                                   |
[INFO] [stdout]    |                                   this formatting argument uses named argument `len` by position
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(named_arguments_used_positionally)]` on by default
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 36 |             StyledObject(format!("{len: >len$}", len = len))
[INFO] [stdout]    |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: named argument `len` is not used by name
[INFO] [stdout]   --> src/internals.rs:36:47
[INFO] [stdout]    |
[INFO] [stdout] 36 |             StyledObject(format!("{: >len$}", len = len))
[INFO] [stdout]    |                                   ---------   ^^^ this named argument is referred to by position in formatting string
[INFO] [stdout]    |                                   |
[INFO] [stdout]    |                                   this formatting argument uses named argument `len` by position
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(named_arguments_used_positionally)]` on by default
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 36 |             StyledObject(format!("{len: >len$}", len = len))
[INFO] [stdout]    |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Title` is never constructed
[INFO] [stdout]   --> src/internals.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct Title<T: Display>(pub T);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Title` is never constructed
[INFO] [stdout]   --> src/internals.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct Title<T: Display>(pub T);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0", kill_on_drop: false }`
[INFO] [stdout] bab19a853de671a03ff1f1441fca121400a64cf934c53e0bb01b8bb425695bb0