[INFO] cloning repository https://github.com/ifukazoo/json-parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ifukazoo/json-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fifukazoo%2Fjson-parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fifukazoo%2Fjson-parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e51aaf18ef495f44d67e7899886159940e5b0142
[INFO] checking ifukazoo/json-parser against master#ffa2e7ae8fbf9badc035740db949b9dae271c29f for pr-78338
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fifukazoo%2Fjson-parser" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ifukazoo/json-parser on toolchain ffa2e7ae8fbf9badc035740db949b9dae271c29f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa2e7ae8fbf9badc035740db949b9dae271c29f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ifukazoo/json-parser
[INFO] finished tweaking git repo https://github.com/ifukazoo/json-parser
[INFO] tweaked toml for git repo https://github.com/ifukazoo/json-parser written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ifukazoo/json-parser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa2e7ae8fbf9badc035740db949b9dae271c29f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa2e7ae8fbf9badc035740db949b9dae271c29f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e078ec3f40013aafd2bd3ad75b54ad4ff48a6153f3fd5a0299430047db4b5223
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e078ec3f40013aafd2bd3ad75b54ad4ff48a6153f3fd5a0299430047db4b5223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e078ec3f40013aafd2bd3ad75b54ad4ff48a6153f3fd5a0299430047db4b5223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e078ec3f40013aafd2bd3ad75b54ad4ff48a6153f3fd5a0299430047db4b5223", kill_on_drop: false }`
[INFO] [stdout] e078ec3f40013aafd2bd3ad75b54ad4ff48a6153f3fd5a0299430047db4b5223
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa2e7ae8fbf9badc035740db949b9dae271c29f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a61b920013b8e10daba00d8a538dc56a6198de50ffa3ca96614b47b723a9669d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a61b920013b8e10daba00d8a538dc56a6198de50ffa3ca96614b47b723a9669d", kill_on_drop: false }`
[INFO] [stderr]     Checking json-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lexer.rs:290:9
[INFO] [stdout]     |
[INFO] [stdout] 290 |         ///
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 291 |         Token::new(StrBody, 0, 2), //
[INFO] [stdout]     |         ------------------------- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lexer.rs:330:9
[INFO] [stdout]     |
[INFO] [stdout] 330 |         ///
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 331 |         Token::new(IllegalToken, 0, 1), //
[INFO] [stdout]     |         ------------------------------ rustdoc does not generate documentation for expressions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "a61b920013b8e10daba00d8a538dc56a6198de50ffa3ca96614b47b723a9669d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a61b920013b8e10daba00d8a538dc56a6198de50ffa3ca96614b47b723a9669d", kill_on_drop: false }`
[INFO] [stdout] a61b920013b8e10daba00d8a538dc56a6198de50ffa3ca96614b47b723a9669d