[INFO] updating cached repository https://github.com/fulstaph/minmaxheap-rust
[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] c3f5d581174735248fa2e4d2a38bcfa184f7091c
[INFO] testing fulstaph/minmaxheap-rust against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffulstaph%2Fminmaxheap-rust" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fulstaph/minmaxheap-rust on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-8/source/Cargo.toml
[INFO] crate git repo https://github.com/fulstaph/minmaxheap-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d251f0bcaa8321e15fd0fe14a0c0baa46ad161c7e4c2b9ca13c3684f5c9aeb42
[INFO] running `"docker" "start" "-a" "d251f0bcaa8321e15fd0fe14a0c0baa46ad161c7e4c2b9ca13c3684f5c9aeb42"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling proc-macro-hack v0.5.12
[INFO] [stderr]    Compiling conditional_impl v0.1.1
[INFO] [stderr]    Compiling conditional v0.1.1
[INFO] [stderr]    Compiling min-max-heap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]  --> src/minmaxheap/minmaxheap.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Deref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::minmaxheap::minmaxheap::MinMaxHeap`
[INFO] [stderr]  --> src/minmaxheap/minmaxheap_tests.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::minmaxheap::minmaxheap::MinMaxHeap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]  --> src/minmaxheap/minmaxheap_tests.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rand::Rng;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Range`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Range;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]   --> src/minmaxheap/minmaxheap.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn from(v: &Vec<T>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `with_capacity`
[INFO] [stderr]   --> src/minmaxheap/minmaxheap.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn with_capacity(len: usize) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/minmaxheap/minmaxheap.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_min`
[INFO] [stderr]   --> src/minmaxheap/minmaxheap.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn peek_min(&self) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_max`
[INFO] [stderr]   --> src/minmaxheap/minmaxheap.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn peek_max(&self) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `erase`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn erase(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right_child`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:218:12
[INFO] [stderr]     |
[INFO] [stderr] 218 |     pub fn right_child(index: usize) -> usize {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_on_max_level`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:229:12
[INFO] [stderr]     |
[INFO] [stderr] 229 |     pub fn is_on_max_level(index: usize) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Operation`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap_tests.rs:112:6
[INFO] [stderr]     |
[INFO] [stderr] 112 | enum Operation {
[INFO] [stderr]     |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap_tests.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 |     pub fn from(num: i32) -> Option<Operation> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `generate_random_data_set`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap_tests.rs:135:4
[INFO] [stderr]     |
[INFO] [stderr] 135 | fn generate_random_data_set(size: usize) -> Vec<i64> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.88s
[INFO] running `"docker" "inspect" "d251f0bcaa8321e15fd0fe14a0c0baa46ad161c7e4c2b9ca13c3684f5c9aeb42"`
[INFO] running `"docker" "rm" "-f" "d251f0bcaa8321e15fd0fe14a0c0baa46ad161c7e4c2b9ca13c3684f5c9aeb42"`
[INFO] [stdout] d251f0bcaa8321e15fd0fe14a0c0baa46ad161c7e4c2b9ca13c3684f5c9aeb42
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1aa2b1a4f6995f072662fc8eda404278a0b02a0f116db94594b5f22a9faed4d4
[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" "1aa2b1a4f6995f072662fc8eda404278a0b02a0f116db94594b5f22a9faed4d4"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling min-max-heap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]  --> src/minmaxheap/minmaxheap.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Deref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Range`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Range;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `with_capacity`
[INFO] [stderr]   --> src/minmaxheap/minmaxheap.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn with_capacity(len: usize) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `erase`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn erase(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right_child`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:218:12
[INFO] [stderr]     |
[INFO] [stderr] 218 |     pub fn right_child(index: usize) -> usize {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_on_max_level`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:229:12
[INFO] [stderr]     |
[INFO] [stderr] 229 |     pub fn is_on_max_level(index: usize) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `"docker" "inspect" "1aa2b1a4f6995f072662fc8eda404278a0b02a0f116db94594b5f22a9faed4d4"`
[INFO] running `"docker" "rm" "-f" "1aa2b1a4f6995f072662fc8eda404278a0b02a0f116db94594b5f22a9faed4d4"`
[INFO] [stdout] 1aa2b1a4f6995f072662fc8eda404278a0b02a0f116db94594b5f22a9faed4d4
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] adfa83d40e08a08aac98c92e8b2b80b134ec5d3ac8cdc8175ff5a66aede243c0
[INFO] running `"docker" "start" "-a" "adfa83d40e08a08aac98c92e8b2b80b134ec5d3ac8cdc8175ff5a66aede243c0"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]  --> src/minmaxheap/minmaxheap.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Deref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Range`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops::Range;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `with_capacity`
[INFO] [stderr]   --> src/minmaxheap/minmaxheap.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn with_capacity(len: usize) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `erase`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     pub fn erase(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right_child`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:218:12
[INFO] [stderr]     |
[INFO] [stderr] 218 |     pub fn right_child(index: usize) -> usize {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_on_max_level`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:229:12
[INFO] [stderr]     |
[INFO] [stderr] 229 |     pub fn is_on_max_level(index: usize) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/min_max_heap-8c50ffdcc84853a4
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test minmaxheap::minmaxheap_tests::peek_max_test ... ok
[INFO] [stdout] test minmaxheap::minmaxheap_tests::pop_max_test ... ok
[INFO] [stdout] test minmaxheap::minmaxheap_tests::pop_min_test ... ok
[INFO] [stdout] test minmaxheap::minmaxheap_tests::pop_last_test ... ok
[INFO] [stdout] test minmaxheap::minmaxheap_tests::peek_min_test ... ok
[INFO] [stdout] test minmaxheap::minmaxheap_tests::weird_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "adfa83d40e08a08aac98c92e8b2b80b134ec5d3ac8cdc8175ff5a66aede243c0"`
[INFO] running `"docker" "rm" "-f" "adfa83d40e08a08aac98c92e8b2b80b134ec5d3ac8cdc8175ff5a66aede243c0"`
[INFO] [stdout] adfa83d40e08a08aac98c92e8b2b80b134ec5d3ac8cdc8175ff5a66aede243c0