[INFO] cloning repository https://github.com/tomaster777/tomn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tomaster777/tomn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomaster777%2Ftomn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomaster777%2Ftomn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a33b865de1285d306a2a1fca10d9d8afa0672bb
[INFO] checking tomaster777/tomn against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomaster777%2Ftomn" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tomaster777/tomn on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tomaster777/tomn
[INFO] finished tweaking git repo https://github.com/tomaster777/tomn
[INFO] tweaked toml for git repo https://github.com/tomaster777/tomn written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/tomaster777/tomn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26fcaecb39af2c9d100200acda3242924b781338da788ee11357919cf2b713f2
[INFO] running `Command { std: "docker" "start" "-a" "26fcaecb39af2c9d100200acda3242924b781338da788ee11357919cf2b713f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26fcaecb39af2c9d100200acda3242924b781338da788ee11357919cf2b713f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26fcaecb39af2c9d100200acda3242924b781338da788ee11357919cf2b713f2", kill_on_drop: false }`
[INFO] [stdout] 26fcaecb39af2c9d100200acda3242924b781338da788ee11357919cf2b713f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e396de72082311b5cac3bfe7de42c26587ccaf41ead358969ba7abedb4c4aeb
[INFO] running `Command { std: "docker" "start" "-a" "6e396de72082311b5cac3bfe7de42c26587ccaf41ead358969ba7abedb4c4aeb", kill_on_drop: false }`
[INFO] [stderr]     Checking tomn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Reader`
[INFO] [stdout]  --> src/reader.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) struct Reader {
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/reader.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn new(content: &str) -> Reader {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]   --> src/reader.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn peek(&self) -> String {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "6e396de72082311b5cac3bfe7de42c26587ccaf41ead358969ba7abedb4c4aeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e396de72082311b5cac3bfe7de42c26587ccaf41ead358969ba7abedb4c4aeb", kill_on_drop: false }`
[INFO] [stdout] 6e396de72082311b5cac3bfe7de42c26587ccaf41ead358969ba7abedb4c4aeb