[INFO] updating cached repository https://github.com/dinkdino/rust_algo
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] fc8630a2f999803aafc1e190f0b992eb616d28dd
[INFO] checking dinkdino/rust_algo against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdinkdino%2Frust_algo" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dinkdino/rust_algo on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/dinkdino/rust_algo
[INFO] finished tweaking git repo https://github.com/dinkdino/rust_algo
[INFO] tweaked toml for git repo https://github.com/dinkdino/rust_algo written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/dinkdino/rust_algo already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2d0143f425ab0eca450c4f390c0ae838e2dc679ead01e6f15a3434377d8938cb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "2d0143f425ab0eca450c4f390c0ae838e2dc679ead01e6f15a3434377d8938cb"`
[INFO] [stderr]     Checking rust_algo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `heap::*`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use heap::*;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Heap`
[INFO] [stderr]  --> src/heap.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Heap<T: PartialOrd, F> {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/heap.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(compare: F) -> Heap<T, F> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sink`
[INFO] [stderr]   --> src/heap.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn sink(&mut self, index: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/heap.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn push(&mut self, value: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/heap.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn pop(&mut self) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `heap::*`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use heap::*;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Heap`
[INFO] [stderr]  --> src/heap.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Heap<T: PartialOrd, F> {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/heap.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(compare: F) -> Heap<T, F> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sink`
[INFO] [stderr]   --> src/heap.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn sink(&mut self, index: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/heap.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn push(&mut self, value: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/heap.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn pop(&mut self) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "2d0143f425ab0eca450c4f390c0ae838e2dc679ead01e6f15a3434377d8938cb"`
[INFO] running `"docker" "rm" "-f" "2d0143f425ab0eca450c4f390c0ae838e2dc679ead01e6f15a3434377d8938cb"`
[INFO] [stdout] 2d0143f425ab0eca450c4f390c0ae838e2dc679ead01e6f15a3434377d8938cb