[INFO] fetching crate named_args 0.0.1...
[INFO] building named_args-0.0.1 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate named_args 0.0.1 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate named_args 0.0.1
[INFO] finished tweaking crates.io crate named_args 0.0.1
[INFO] tweaked toml for crates.io crate named_args 0.0.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate named_args 0.0.1 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate named_args 0.0.1 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3d3e887e1b45f6bcb3b827f44e48ec2797958cd5323d696a41ff1a410e83e6db
[INFO] running `Command { std: "docker" "start" "-a" "3d3e887e1b45f6bcb3b827f44e48ec2797958cd5323d696a41ff1a410e83e6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d3e887e1b45f6bcb3b827f44e48ec2797958cd5323d696a41ff1a410e83e6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d3e887e1b45f6bcb3b827f44e48ec2797958cd5323d696a41ff1a410e83e6db", kill_on_drop: false }`
[INFO] [stdout] 3d3e887e1b45f6bcb3b827f44e48ec2797958cd5323d696a41ff1a410e83e6db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 591b3702efd31f16cabc1c4b6faa2eceeee8ef3009dd9e8671a8bacc6444fd3e
[INFO] running `Command { std: "docker" "start" "-a" "591b3702efd31f16cabc1c4b6faa2eceeee8ef3009dd9e8671a8bacc6444fd3e", kill_on_drop: false }`
[INFO] [stderr]    Compiling named_args v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/poc.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn func(&self, x: Option<i32>, y: i32, z: Option<i32>) {
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/poc.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn func(&self, x: Option<i32>, y: i32, z: Option<i32>) {
[INFO] [stdout]    |                                        ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/poc.rs:12:48
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn func(&self, x: Option<i32>, y: i32, z: Option<i32>) {
[INFO] [stdout]    |                                                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "591b3702efd31f16cabc1c4b6faa2eceeee8ef3009dd9e8671a8bacc6444fd3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "591b3702efd31f16cabc1c4b6faa2eceeee8ef3009dd9e8671a8bacc6444fd3e", kill_on_drop: false }`
[INFO] [stdout] 591b3702efd31f16cabc1c4b6faa2eceeee8ef3009dd9e8671a8bacc6444fd3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5705357d6b519e5c819cd35d0a042be5f67756734f24ee888ddd21a0b20e425e
[INFO] running `Command { std: "docker" "start" "-a" "5705357d6b519e5c819cd35d0a042be5f67756734f24ee888ddd21a0b20e425e", kill_on_drop: false }`
[INFO] [stderr]    Compiling named_args v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/poc.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn func(&self, x: Option<i32>, y: i32, z: Option<i32>) {
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/poc.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn func(&self, x: Option<i32>, y: i32, z: Option<i32>) {
[INFO] [stdout]    |                                        ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/poc.rs:12:48
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn func(&self, x: Option<i32>, y: i32, z: Option<i32>) {
[INFO] [stdout]    |                                                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "5705357d6b519e5c819cd35d0a042be5f67756734f24ee888ddd21a0b20e425e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5705357d6b519e5c819cd35d0a042be5f67756734f24ee888ddd21a0b20e425e", kill_on_drop: false }`
[INFO] [stdout] 5705357d6b519e5c819cd35d0a042be5f67756734f24ee888ddd21a0b20e425e