[INFO] cloning repository https://github.com/fulstaph/minmaxheap-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fulstaph/minmaxheap-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffulstaph%2Fminmaxheap-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffulstaph%2Fminmaxheap-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c3f5d581174735248fa2e4d2a38bcfa184f7091c
[INFO] checking fulstaph/minmaxheap-rust against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffulstaph%2Fminmaxheap-rust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fulstaph/minmaxheap-rust on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fulstaph/minmaxheap-rust
[INFO] finished tweaking git repo https://github.com/fulstaph/minmaxheap-rust
[INFO] tweaked toml for git repo https://github.com/fulstaph/minmaxheap-rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/fulstaph/minmaxheap-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.12
[INFO] [stderr]   Downloaded conditional v0.1.1
[INFO] [stderr]   Downloaded conditional_impl v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92ce1aafd9ccea6c4c67dfd6adbb9c44a337701bfea525302282194366e0b2fb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "92ce1aafd9ccea6c4c67dfd6adbb9c44a337701bfea525302282194366e0b2fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92ce1aafd9ccea6c4c67dfd6adbb9c44a337701bfea525302282194366e0b2fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92ce1aafd9ccea6c4c67dfd6adbb9c44a337701bfea525302282194366e0b2fb", kill_on_drop: false }`
[INFO] [stdout] 92ce1aafd9ccea6c4c67dfd6adbb9c44a337701bfea525302282194366e0b2fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] 0f2ca50d230bb17b9a2fd767b3d3d21d5b9d6fdd83e089b08bc25c911a66fbbd
[INFO] running `Command { std: "docker" "start" "-a" "0f2ca50d230bb17b9a2fd767b3d3d21d5b9d6fdd83e089b08bc25c911a66fbbd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling proc-macro-hack v0.5.12
[INFO] [stderr]    Compiling conditional_impl v0.1.1
[INFO] [stderr]     Checking conditional v0.1.1
[INFO] [stderr]     Checking min-max-heap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/minmaxheap/minmaxheap.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Range`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Range;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/minmaxheap/minmaxheap.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::minmaxheap::minmaxheap::MinMaxHeap`
[INFO] [stdout]  --> src/minmaxheap/minmaxheap_tests.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::minmaxheap::minmaxheap::MinMaxHeap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> src/minmaxheap/minmaxheap_tests.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::Rng;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Range`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Range;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from`
[INFO] [stdout]   --> src/minmaxheap/minmaxheap.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn from(v: &Vec<T>) -> Self {
[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: `with_capacity`
[INFO] [stdout]   --> src/minmaxheap/minmaxheap.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn with_capacity(len: usize) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `empty`
[INFO] [stdout]   --> src/minmaxheap/minmaxheap.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_min`
[INFO] [stdout]   --> src/minmaxheap/minmaxheap.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn peek_min(&self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_max`
[INFO] [stdout]   --> src/minmaxheap/minmaxheap.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn peek_max(&self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `erase`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn erase(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `right_child`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap.rs:218:12
[INFO] [stdout]     |
[INFO] [stdout] 218 |     pub fn right_child(index: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_on_max_level`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap.rs:229:12
[INFO] [stdout]     |
[INFO] [stdout] 229 |     pub fn is_on_max_level(index: usize) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Operation`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap_tests.rs:112:6
[INFO] [stdout]     |
[INFO] [stdout] 112 | enum Operation {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap_tests.rs:122:12
[INFO] [stdout]     |
[INFO] [stdout] 122 |     pub fn from(num: i32) -> Option<Operation> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_random_data_set`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap_tests.rs:135:4
[INFO] [stdout]     |
[INFO] [stdout] 135 | fn generate_random_data_set(size: usize) -> Vec<i64> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `with_capacity`
[INFO] [stdout]   --> src/minmaxheap/minmaxheap.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn with_capacity(len: usize) -> Self {
[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: `erase`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub fn erase(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `right_child`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap.rs:218:12
[INFO] [stdout]     |
[INFO] [stdout] 218 |     pub fn right_child(index: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_on_max_level`
[INFO] [stdout]    --> src/minmaxheap/minmaxheap.rs:229:12
[INFO] [stdout]     |
[INFO] [stdout] 229 |     pub fn is_on_max_level(index: usize) -> bool {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.35s
[INFO] running `Command { std: "docker" "inspect" "0f2ca50d230bb17b9a2fd767b3d3d21d5b9d6fdd83e089b08bc25c911a66fbbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f2ca50d230bb17b9a2fd767b3d3d21d5b9d6fdd83e089b08bc25c911a66fbbd", kill_on_drop: false }`
[INFO] [stdout] 0f2ca50d230bb17b9a2fd767b3d3d21d5b9d6fdd83e089b08bc25c911a66fbbd