[INFO] cloning repository https://github.com/luizlls/nitrine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/luizlls/nitrine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluizlls%2Fnitrine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluizlls%2Fnitrine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e31d4ac4e6d4cedfcf9a63666b3f8bb3f3211145
[INFO] checking luizlls/nitrine against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluizlls%2Fnitrine" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/luizlls/nitrine on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/luizlls/nitrine
[INFO] finished tweaking git repo https://github.com/luizlls/nitrine
[INFO] tweaked toml for git repo https://github.com/luizlls/nitrine written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/luizlls/nitrine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1b2dd2db2c3fec61f31a68bcb46132cdd17b19ddd2b7cb9567b5e66e96997217
[INFO] running `Command { std: "docker" "start" "-a" "1b2dd2db2c3fec61f31a68bcb46132cdd17b19ddd2b7cb9567b5e66e96997217", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b2dd2db2c3fec61f31a68bcb46132cdd17b19ddd2b7cb9567b5e66e96997217", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b2dd2db2c3fec61f31a68bcb46132cdd17b19ddd2b7cb9567b5e66e96997217", kill_on_drop: false }`
[INFO] [stdout] 1b2dd2db2c3fec61f31a68bcb46132cdd17b19ddd2b7cb9567b5e66e96997217
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8999b2a7f7c205df7d5b24d767258334cab7d820ed56beada5076eb773804a9d
[INFO] running `Command { std: "docker" "start" "-a" "8999b2a7f7c205df7d5b24d767258334cab7d820ed56beada5076eb773804a9d", kill_on_drop: false }`
[INFO] [stderr]     Checking nitrine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Context`
[INFO] [stdout]  --> src/analysis.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Context<'ctx> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/analysis.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn new() -> Context<'ctx> {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `nested`
[INFO] [stdout]   --> src/analysis.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn nested(parent: &'ctx Context) -> Context<'ctx> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/analysis.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn insert(&mut self, name: String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find`
[INFO] [stdout]   --> src/analysis.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn find(&self, name: &str) -> bool {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Analyzer`
[INFO] [stdout]   --> src/analysis.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct Analyzer {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Context`
[INFO] [stdout]  --> src/analysis.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Context<'ctx> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/analysis.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn new() -> Context<'ctx> {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `nested`
[INFO] [stdout]   --> src/analysis.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn nested(parent: &'ctx Context) -> Context<'ctx> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/analysis.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn insert(&mut self, name: String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find`
[INFO] [stdout]   --> src/analysis.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn find(&self, name: &str) -> bool {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Analyzer`
[INFO] [stdout]   --> src/analysis.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct Analyzer {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `Command { std: "docker" "inspect" "8999b2a7f7c205df7d5b24d767258334cab7d820ed56beada5076eb773804a9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8999b2a7f7c205df7d5b24d767258334cab7d820ed56beada5076eb773804a9d", kill_on_drop: false }`
[INFO] [stdout] 8999b2a7f7c205df7d5b24d767258334cab7d820ed56beada5076eb773804a9d