[INFO] fetching crate gn 0.1.5...
[INFO] checking gn-0.1.5 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate gn 0.1.5 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate gn 0.1.5 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gn 0.1.5
[INFO] finished tweaking crates.io crate gn 0.1.5
[INFO] tweaked toml for crates.io crate gn 0.1.5 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate gn 0.1.5 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unsafe-libyaml v0.2.4
[INFO] [stderr]   Downloaded serde-gron v0.1.2
[INFO] [stderr]   Downloaded bool_ext v0.5.1
[INFO] [stderr]   Downloaded serde_yaml v0.9.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3286f0f39426827d58f339409e417bbe55499c585761cfb6a5a0e15703e5f85b
[INFO] running `Command { std: "docker" "start" "-a" "3286f0f39426827d58f339409e417bbe55499c585761cfb6a5a0e15703e5f85b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3286f0f39426827d58f339409e417bbe55499c585761cfb6a5a0e15703e5f85b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3286f0f39426827d58f339409e417bbe55499c585761cfb6a5a0e15703e5f85b", kill_on_drop: false }`
[INFO] [stdout] 3286f0f39426827d58f339409e417bbe55499c585761cfb6a5a0e15703e5f85b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebf90b9fbe0dab63711eb48f35ef7bdf4cbf1877fc59be9aa755b363dfeb1f9c
[INFO] running `Command { std: "docker" "start" "-a" "ebf90b9fbe0dab63711eb48f35ef7bdf4cbf1877fc59be9aa755b363dfeb1f9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.100
[INFO] [stderr]    Compiling serde_derive v1.0.144
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling once_cell v1.14.0
[INFO] [stderr]    Compiling serde_json v1.0.85
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling anyhow v1.0.65
[INFO] [stderr]     Checking unsafe-libyaml v0.2.4
[INFO] [stderr]     Checking bool_ext v0.5.1
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.35
[INFO] [stderr]    Compiling clap_derive v3.2.18
[INFO] [stderr]    Compiling thiserror v1.0.35
[INFO] [stderr]    Compiling pest v2.3.1
[INFO] [stderr]     Checking clap v3.2.22
[INFO] [stderr]    Compiling pest_meta v2.3.1
[INFO] [stderr]    Compiling pest_generator v2.3.1
[INFO] [stderr]    Compiling pest_derive v2.3.1
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]     Checking url v2.3.1
[INFO] [stderr]     Checking serde_yaml v0.9.13
[INFO] [stderr]     Checking json5 v0.4.1
[INFO] [stderr]     Checking serde-gron v0.1.2
[INFO] [stderr]     Checking gn v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             let mut args = args;
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `OutputWriter` is never used
[INFO] [stdout]   --> src/output/mod.rs:41:11
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub trait OutputWriter<Value> {
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             let mut args = args;
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `OutputWriter` is never used
[INFO] [stdout]   --> src/output/mod.rs:41:11
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub trait OutputWriter<Value> {
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.03s
[INFO] running `Command { std: "docker" "inspect" "ebf90b9fbe0dab63711eb48f35ef7bdf4cbf1877fc59be9aa755b363dfeb1f9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebf90b9fbe0dab63711eb48f35ef7bdf4cbf1877fc59be9aa755b363dfeb1f9c", kill_on_drop: false }`
[INFO] [stdout] ebf90b9fbe0dab63711eb48f35ef7bdf4cbf1877fc59be9aa755b363dfeb1f9c