[INFO] cloning repository https://github.com/cottonguard/rust-lazy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cottonguard/rust-lazy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcottonguard%2Frust-lazy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcottonguard%2Frust-lazy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 37a1abf985479fb6dc1197b515c4fcf3786ba281
[INFO] checking cottonguard/rust-lazy against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcottonguard%2Frust-lazy" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cottonguard/rust-lazy 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/cottonguard/rust-lazy
[INFO] finished tweaking git repo https://github.com/cottonguard/rust-lazy
[INFO] tweaked toml for git repo https://github.com/cottonguard/rust-lazy written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/cottonguard/rust-lazy 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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stdout] bc8a8b0ac4e95112a94b6080ca2f8087b53d1dc983a5cbcccaa1ef6c87869213
[INFO] running `Command { std: "docker" "start" "-a" "bc8a8b0ac4e95112a94b6080ca2f8087b53d1dc983a5cbcccaa1ef6c87869213", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc8a8b0ac4e95112a94b6080ca2f8087b53d1dc983a5cbcccaa1ef6c87869213", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc8a8b0ac4e95112a94b6080ca2f8087b53d1dc983a5cbcccaa1ef6c87869213", kill_on_drop: false }`
[INFO] [stdout] bc8a8b0ac4e95112a94b6080ca2f8087b53d1dc983a5cbcccaa1ef6c87869213
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stdout] 7a51764204a487bf2432e4657df9c43e527c46df0a613fd3e053453c71c89b11
[INFO] running `Command { std: "docker" "start" "-a" "7a51764204a487bf2432e4657df9c43e527c46df0a613fd3e053453c71c89b11", kill_on_drop: false }`
[INFO] [stderr]     Checking list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Thunk`
[INFO] [stdout]  --> src/lazy.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Thunk(F),
[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: `value`
[INFO] [stdout]  --> src/lazy.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn value(v: T) -> Lazy<fn() -> T, T> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `thunk`
[INFO] [stdout]   --> src/lazy.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn thunk(f: F) -> Lazy<F, T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_if_forced`
[INFO] [stdout]   --> src/lazy.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn get_if_forced(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_forced`
[INFO] [stdout]   --> src/lazy.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn is_forced(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_inner`
[INFO] [stdout]   --> src/lazy.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn into_inner(mut self) -> T {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `thunk`
[INFO] [stdout]   --> src/lazy_cell.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn thunk(f: F) -> LazyCell<F, T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_inner`
[INFO] [stdout]   --> src/lazy_cell.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn into_inner(self) -> T {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/lazy_cell.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn value(v: T) -> LazyCell<fn() -> T, T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/lazy.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let mut v = Lazy::value(234);
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lazy.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let mut v = Lazy::value(234);
[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: associated function is never used: `value`
[INFO] [stdout]   --> src/lazy_cell.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn value(v: T) -> LazyCell<fn() -> T, T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "7a51764204a487bf2432e4657df9c43e527c46df0a613fd3e053453c71c89b11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a51764204a487bf2432e4657df9c43e527c46df0a613fd3e053453c71c89b11", kill_on_drop: false }`
[INFO] [stdout] 7a51764204a487bf2432e4657df9c43e527c46df0a613fd3e053453c71c89b11