[INFO] cloning repository https://github.com/Yuta1004/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/Yuta1004/json_parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYuta1004%2Fjson_parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYuta1004%2Fjson_parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4aa0d82f276d8fcf9953e714cf170b4c6c388aa
[INFO] checking Yuta1004/json_parser against master#fd0c901b00ee1e08a250039cdb90258603497e20 for pr-153692
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYuta1004%2Fjson_parser" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Yuta1004/json_parser
[INFO] finished tweaking git repo https://github.com/Yuta1004/json_parser
[INFO] tweaked toml for git repo https://github.com/Yuta1004/json_parser written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Yuta1004/json_parser on toolchain fd0c901b00ee1e08a250039cdb90258603497e20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fd0c901b00ee1e08a250039cdb90258603497e20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Yuta1004/json_parser 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" "+fd0c901b00ee1e08a250039cdb90258603497e20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+fd0c901b00ee1e08a250039cdb90258603497e20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 639a831c2b89b70963262133ce3ce16f96b02d2b48c800ba85d4ec2a6a894ec9
[INFO] running `Command { std: "docker" "start" "-a" "639a831c2b89b70963262133ce3ce16f96b02d2b48c800ba85d4ec2a6a894ec9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "639a831c2b89b70963262133ce3ce16f96b02d2b48c800ba85d4ec2a6a894ec9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "639a831c2b89b70963262133ce3ce16f96b02d2b48c800ba85d4ec2a6a894ec9", kill_on_drop: false }`
[INFO] [stdout] 639a831c2b89b70963262133ce3ce16f96b02d2b48c800ba85d4ec2a6a894ec9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+fd0c901b00ee1e08a250039cdb90258603497e20" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75c0dbf32675b6c9c0ec0329917f092f9f2a36501666994e4605fafe62d197c5
[INFO] running `Command { std: "docker" "start" "-a" "75c0dbf32675b6c9c0ec0329917f092f9f2a36501666994e4605fafe62d197c5", kill_on_drop: false }`
[INFO] [stderr]     Checking json_parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]  --> src/parser/mtype/value.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Value {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `new_num`, `new_bool`, and `new_str` are never used
[INFO] [stdout]   --> src/parser/mtype/value.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl Value {
[INFO] [stdout]    | ---------- associated functions in this implementation
[INFO] [stdout]  8 |     pub fn new_num(val: i32) -> Value {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn new_bool(val: bool) -> Value {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn new_str(val: impl Into<String>) -> Value {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Array` is never constructed
[INFO] [stdout]  --> src/parser/mtype/array.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Array {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, and `len` are never used
[INFO] [stdout]   --> src/parser/mtype/array.rs:8:8
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl Array {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout]  8 |     fn new() -> Array {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn push(self: &mut Array, val: Value) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn len(self: &Array) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "75c0dbf32675b6c9c0ec0329917f092f9f2a36501666994e4605fafe62d197c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75c0dbf32675b6c9c0ec0329917f092f9f2a36501666994e4605fafe62d197c5", kill_on_drop: false }`
[INFO] [stdout] 75c0dbf32675b6c9c0ec0329917f092f9f2a36501666994e4605fafe62d197c5