[INFO] cloning repository https://github.com/rwxdash/unravel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rwxdash/unravel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frwxdash%2Funravel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frwxdash%2Funravel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84ccb298dcc8df84ef43b22114fbd0278920f2aa
[INFO] checking rwxdash/unravel against f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1 for pr-160235-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frwxdash%2Funravel" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rwxdash/unravel
[INFO] finished tweaking git repo https://github.com/rwxdash/unravel
[INFO] tweaked toml for git repo https://github.com/rwxdash/unravel written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rwxdash/unravel 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 git repo https://github.com/rwxdash/unravel 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad
[INFO] running `Command { std: "docker" "start" "4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad", 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" "4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad" "/opt/rustwide/cargo-home/bin/cargo" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad", 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" "4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad" "/opt/rustwide/cargo-home/bin/cargo" "+f99a7560a6b5f0a5e6894aea7e8afe0e01d3edd1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking unravel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `CharIndices` and `Chars`
[INFO] [stdout]  --> src/lib.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::str::{CharIndices, Chars};
[INFO] [stdout]   |                ^^^^^^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `CharIndices` and `Chars`
[INFO] [stdout]  --> src/lib.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::str::{CharIndices, Chars};
[INFO] [stdout]   |                ^^^^^^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/lib.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut val: JsonValue;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `ConfirmedValid` is never constructed
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | enum Validation {
[INFO] [stdout]    |      ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 12 |     ConfirmedValid,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/lib.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut val: JsonValue;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `ConfirmedValid` is never constructed
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | enum Validation {
[INFO] [stdout]    |      ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 12 |     ConfirmedValid,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next_token`
[INFO] [stdout]   --> src/main.rs:23:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |     while let Some(next_token) = lexer.next_token() {
[INFO] [stdout]    |                    ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_token`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next_token`
[INFO] [stdout]   --> src/main.rs:23:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |     while let Some(next_token) = lexer.next_token() {
[INFO] [stdout]    |                    ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_token`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad", kill_on_drop: false }`
[INFO] [stdout] 4c7fbcc503bf5bbe627e2338890a5c7404a87c5e59653297587e51c431dcb1ad