[INFO] updating cached repository https://github.com/cottonguard/rust-lazy
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 37a1abf985479fb6dc1197b515c4fcf3786ba281
[INFO] checking cottonguard/rust-lazy against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcottonguard%2Frust-lazy" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cottonguard/rust-lazy on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/cottonguard/rust-lazy already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3f839e7f1eac163589e8353fb068c80ad95d698228e32c1d46e5ee495f2ad330
[INFO] running `"docker" "start" "-a" "3f839e7f1eac163589e8353fb068c80ad95d698228e32c1d46e5ee495f2ad330"`
[INFO] [stderr]     Checking list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/lazy.rs:72:17
[INFO] [stderr]    |
[INFO] [stderr] 72 |         let mut v = Lazy::value(234);
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lazy.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |         let mut v = Lazy::value(234);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]   --> src/lazy_cell.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn value(v: T) -> LazyCell<fn() -> T, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Thunk`
[INFO] [stderr]  --> src/lazy.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     Thunk(F),
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]  --> src/lazy.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn value(v: T) -> Lazy<fn() -> T, T> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `thunk`
[INFO] [stderr]   --> src/lazy.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn thunk(f: F) -> Lazy<F, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_if_forced`
[INFO] [stderr]   --> src/lazy.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn get_if_forced(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_forced`
[INFO] [stderr]   --> src/lazy.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn is_forced(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_inner`
[INFO] [stderr]   --> src/lazy.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn into_inner(mut self) -> T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `thunk`
[INFO] [stderr]   --> src/lazy_cell.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn thunk(f: F) -> LazyCell<F, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_inner`
[INFO] [stderr]   --> src/lazy_cell.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn into_inner(self) -> T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]   --> src/lazy_cell.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn value(v: T) -> LazyCell<fn() -> T, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.65s
[INFO] running `"docker" "inspect" "3f839e7f1eac163589e8353fb068c80ad95d698228e32c1d46e5ee495f2ad330"`
[INFO] running `"docker" "rm" "-f" "3f839e7f1eac163589e8353fb068c80ad95d698228e32c1d46e5ee495f2ad330"`
[INFO] [stdout] 3f839e7f1eac163589e8353fb068c80ad95d698228e32c1d46e5ee495f2ad330