[INFO] cloning repository https://github.com/Ki11erRabbit/caat_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ki11erRabbit/caat_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKi11erRabbit%2Fcaat_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKi11erRabbit%2Fcaat_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f3af16ed302e89aeda8e9c35420090cfe74923eb
[INFO] checking Ki11erRabbit/caat_rust against try#4907eac94165faff6c5e5e015670b1c584275f7b for pr-154149
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKi11erRabbit%2Fcaat_rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ki11erRabbit/caat_rust
[INFO] finished tweaking git repo https://github.com/Ki11erRabbit/caat_rust
[INFO] tweaked toml for git repo https://github.com/Ki11erRabbit/caat_rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ki11erRabbit/caat_rust on toolchain 4907eac94165faff6c5e5e015670b1c584275f7b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ki11erRabbit/caat_rust 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" "+4907eac94165faff6c5e5e015670b1c584275f7b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking Ki11erRabbit/caat_rust against try#4907eac94165faff6c5e5e015670b1c584275f7b for pr-154149
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKi11erRabbit%2Fcaat_rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ki11erRabbit/caat_rust
[INFO] finished tweaking git repo https://github.com/Ki11erRabbit/caat_rust
[INFO] tweaked toml for git repo https://github.com/Ki11erRabbit/caat_rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ki11erRabbit/caat_rust on toolchain 4907eac94165faff6c5e5e015670b1c584275f7b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ki11erRabbit/caat_rust 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" "+4907eac94165faff6c5e5e015670b1c584275f7b" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded intmap v0.7.1
[INFO] [stderr]   Downloaded spinning v0.1.0
[INFO] [stderr]   Downloaded async-channel v2.2.0
[INFO] [stderr]   Downloaded blocking v1.5.1
[INFO] [stderr]   Downloaded async-task v4.7.0
[INFO] [stderr]   Downloaded event-listener-strategy v0.5.0
[INFO] [stderr]   Downloaded event-listener v5.0.0
[INFO] [stderr]   Downloaded json v0.12.4
[INFO] [stderr]   Downloaded async-lock v3.3.0
[INFO] [stderr]   Downloaded interprocess v1.2.1
[INFO] [stderr]   Downloaded futures-lite v2.2.0
[INFO] [stderr]   Downloaded to_method v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7cd7a0dfe5eb8d5150236225a9b55d19d0d5069ada26990249d8d100488084c0
[INFO] running `Command { std: "docker" "start" "-a" "7cd7a0dfe5eb8d5150236225a9b55d19d0d5069ada26990249d8d100488084c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7cd7a0dfe5eb8d5150236225a9b55d19d0d5069ada26990249d8d100488084c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cd7a0dfe5eb8d5150236225a9b55d19d0d5069ada26990249d8d100488084c0", kill_on_drop: false }`
[INFO] [stdout] 7cd7a0dfe5eb8d5150236225a9b55d19d0d5069ada26990249d8d100488084c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98325b8bf737a99c5a0a7bf34eabf44a977ef99c7d689dd731166c59fd77a25e
[INFO] running `Command { std: "docker" "start" "-a" "98325b8bf737a99c5a0a7bf34eabf44a977ef99c7d689dd731166c59fd77a25e", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking parking v2.2.0
[INFO] [stderr]    Compiling semver v1.0.21
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]     Checking futures-lite v2.2.0
[INFO] [stderr]     Checking async-task v4.7.0
[INFO] [stderr]     Checking concurrent-queue v2.4.0
[INFO] [stderr]     Checking spinning v0.1.0
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking intmap v0.7.1
[INFO] [stderr]     Checking to_method v1.1.0
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking event-listener v5.0.0
[INFO] [stderr]     Checking event-listener v4.0.3
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking event-listener-strategy v0.4.0
[INFO] [stderr]     Checking async-lock v3.3.0
[INFO] [stderr]     Checking event-listener-strategy v0.5.0
[INFO] [stderr]    Compiling interprocess v1.2.1
[INFO] [stderr]     Checking async-channel v2.2.0
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]     Checking caat_rust v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:236:17
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 write!(f, "\"format\": {}", format);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 let _ = write!(f, "\"format\": {}", format);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:272:17
[INFO] [stdout]     |
[INFO] [stdout] 272 |                 write!(f, ", {}", format);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 272 |                 let _ = write!(f, ", {}", format);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:236:17
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 write!(f, "\"format\": {}", format);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 236 |                 let _ = write!(f, "\"format\": {}", format);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:272:17
[INFO] [stdout]     |
[INFO] [stdout] 272 |                 write!(f, ", {}", format);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 272 |                 let _ = write!(f, ", {}", format);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.07s
[INFO] running `Command { std: "docker" "inspect" "98325b8bf737a99c5a0a7bf34eabf44a977ef99c7d689dd731166c59fd77a25e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98325b8bf737a99c5a0a7bf34eabf44a977ef99c7d689dd731166c59fd77a25e", kill_on_drop: false }`
[INFO] [stdout] 98325b8bf737a99c5a0a7bf34eabf44a977ef99c7d689dd731166c59fd77a25e