[INFO] cloning repository https://github.com/exphp-share/json-pretty
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/exphp-share/json-pretty" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexphp-share%2Fjson-pretty", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexphp-share%2Fjson-pretty'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c653d6744a05c5118e3d91de5d374219ef83bca9
[INFO] checking exphp-share/json-pretty against try#87f2ecc56b5f6032b075c8934ebc77f28d57183c for pr-148190
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexphp-share%2Fjson-pretty" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/exphp-share/json-pretty
[INFO] finished tweaking git repo https://github.com/exphp-share/json-pretty
[INFO] tweaked toml for git repo https://github.com/exphp-share/json-pretty written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/exphp-share/json-pretty on toolchain 87f2ecc56b5f6032b075c8934ebc77f28d57183c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/exphp-share/json-pretty 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" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking exphp-share/json-pretty against try#87f2ecc56b5f6032b075c8934ebc77f28d57183c for pr-148190
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexphp-share%2Fjson-pretty" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/exphp-share/json-pretty
[INFO] finished tweaking git repo https://github.com/exphp-share/json-pretty
[INFO] tweaked toml for git repo https://github.com/exphp-share/json-pretty written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/exphp-share/json-pretty on toolchain 87f2ecc56b5f6032b075c8934ebc77f28d57183c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/exphp-share/json-pretty 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" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8122adee39218c6dce945367618abb3d8ee194947645e9203125abf67e7a7411
[INFO] running `Command { std: "docker" "start" "-a" "8122adee39218c6dce945367618abb3d8ee194947645e9203125abf67e7a7411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8122adee39218c6dce945367618abb3d8ee194947645e9203125abf67e7a7411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8122adee39218c6dce945367618abb3d8ee194947645e9203125abf67e7a7411", kill_on_drop: false }`
[INFO] [stdout] 8122adee39218c6dce945367618abb3d8ee194947645e9203125abf67e7a7411
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b338f8628458f2a8d97c1f752c1c78e59b93546a6de9d18b802aee1f8f35fd7
[INFO] running `Command { std: "docker" "start" "-a" "1b338f8628458f2a8d97c1f752c1c78e59b93546a6de9d18b802aee1f8f35fd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking json-pretty v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut in_text = String::new();
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `in_text`
[INFO] [stdout]  --> src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut in_text = String::new();
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_in_text`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `stringify` is never used
[INFO] [stdout]   --> src/fmt.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn stringify<T: Format>(value: &T) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `stringify_with` is never used
[INFO] [stdout]   --> src/fmt.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn stringify_with<T: Format>(value: &T, config: Config) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `max_columns` is never used
[INFO] [stdout]   --> src/fmt.rs:81:12
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl Config {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 81 |     pub fn max_columns(mut self, width: usize) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Either` is never used
[INFO] [stdout]    --> src/fmt.rs:349:6
[INFO] [stdout]     |
[INFO] [stdout] 349 | enum Either<A, B> { This(A), That(B) }
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `State` is never constructed
[INFO] [stdout]    --> src/fmt.rs:404:8
[INFO] [stdout]     |
[INFO] [stdout] 404 | struct State {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/fmt.rs:418:8
[INFO] [stdout]     |
[INFO] [stdout] 417 | impl State {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] 418 |     fn new() -> Self { State {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_inner` is never used
[INFO] [stdout]    --> src/fmt.rs:147:16
[INFO] [stdout]     |
[INFO] [stdout] 122 |     impl<W: io::Write> Formatter<W> {
[INFO] [stdout]     |     ------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 147 |         pub fn into_inner(mut self) -> Result<W> {
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `fmt_label` and `fmt_separated` are never used
[INFO] [stdout]    --> src/fmt.rs:170:16
[INFO] [stdout]     |
[INFO] [stdout] 161 |     impl<W: io::Write> Formatter<W> {
[INFO] [stdout]     |     ------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 170 |         pub fn fmt_label<T: Format>(&mut self, label: T) -> Result {
[INFO] [stdout]     |                ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 232 |         pub fn fmt_separated<T: Format, B>(
[INFO] [stdout]     |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut in_text = String::new();
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `in_text`
[INFO] [stdout]  --> src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut in_text = String::new();
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_in_text`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `stringify` is never used
[INFO] [stdout]   --> src/fmt.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn stringify<T: Format>(value: &T) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `stringify_with` is never used
[INFO] [stdout]   --> src/fmt.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn stringify_with<T: Format>(value: &T, config: Config) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `max_columns` is never used
[INFO] [stdout]   --> src/fmt.rs:81:12
[INFO] [stdout]    |
[INFO] [stdout] 72 | impl Config {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 81 |     pub fn max_columns(mut self, width: usize) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Either` is never used
[INFO] [stdout]    --> src/fmt.rs:349:6
[INFO] [stdout]     |
[INFO] [stdout] 349 | enum Either<A, B> { This(A), That(B) }
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `State` is never constructed
[INFO] [stdout]    --> src/fmt.rs:404:8
[INFO] [stdout]     |
[INFO] [stdout] 404 | struct State {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/fmt.rs:418:8
[INFO] [stdout]     |
[INFO] [stdout] 417 | impl State {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] 418 |     fn new() -> Self { State {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_inner` is never used
[INFO] [stdout]    --> src/fmt.rs:147:16
[INFO] [stdout]     |
[INFO] [stdout] 122 |     impl<W: io::Write> Formatter<W> {
[INFO] [stdout]     |     ------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 147 |         pub fn into_inner(mut self) -> Result<W> {
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `fmt_label` and `fmt_separated` are never used
[INFO] [stdout]    --> src/fmt.rs:170:16
[INFO] [stdout]     |
[INFO] [stdout] 161 |     impl<W: io::Write> Formatter<W> {
[INFO] [stdout]     |     ------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 170 |         pub fn fmt_label<T: Format>(&mut self, label: T) -> Result {
[INFO] [stdout]     |                ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 232 |         pub fn fmt_separated<T: Format, B>(
[INFO] [stdout]     |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.79s
[INFO] running `Command { std: "docker" "inspect" "1b338f8628458f2a8d97c1f752c1c78e59b93546a6de9d18b802aee1f8f35fd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b338f8628458f2a8d97c1f752c1c78e59b93546a6de9d18b802aee1f8f35fd7", kill_on_drop: false }`
[INFO] [stdout] 1b338f8628458f2a8d97c1f752c1c78e59b93546a6de9d18b802aee1f8f35fd7
