[INFO] updating cached 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" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c3f5d581174735248fa2e4d2a38bcfa184f7091c
[INFO] testing fulstaph/minmaxheap-rust against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffulstaph%2Fminmaxheap-rust" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fulstaph/minmaxheap-rust on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", 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-12/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" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7018f285abb2157663b471fe656ab2460397d5b41ba39adab780f1f3e322c46
[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" "e7018f285abb2157663b471fe656ab2460397d5b41ba39adab780f1f3e322c46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7018f285abb2157663b471fe656ab2460397d5b41ba39adab780f1f3e322c46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7018f285abb2157663b471fe656ab2460397d5b41ba39adab780f1f3e322c46", kill_on_drop: false }`
[INFO] [stdout] e7018f285abb2157663b471fe656ab2460397d5b41ba39adab780f1f3e322c46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--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] ef722346adef501aede734c9e0eafd9c2e535269996e5e3342fce91d8d7a446f
[INFO] running `Command { std: "docker" "start" "-a" "ef722346adef501aede734c9e0eafd9c2e535269996e5e3342fce91d8d7a446f", kill_on_drop: false }`
[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] [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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.74s
[INFO] running `Command { std: "docker" "inspect" "ef722346adef501aede734c9e0eafd9c2e535269996e5e3342fce91d8d7a446f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef722346adef501aede734c9e0eafd9c2e535269996e5e3342fce91d8d7a446f", kill_on_drop: false }`
[INFO] [stdout] ef722346adef501aede734c9e0eafd9c2e535269996e5e3342fce91d8d7a446f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75aea150882f97bce7483ef5444ff1106dd8eb856350be2fa3e82afb0ad2412d
[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" "75aea150882f97bce7483ef5444ff1106dd8eb856350be2fa3e82afb0ad2412d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling 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: 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 test [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "75aea150882f97bce7483ef5444ff1106dd8eb856350be2fa3e82afb0ad2412d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75aea150882f97bce7483ef5444ff1106dd8eb856350be2fa3e82afb0ad2412d", kill_on_drop: false }`
[INFO] [stdout] 75aea150882f97bce7483ef5444ff1106dd8eb856350be2fa3e82afb0ad2412d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 471abe6b87801f46b58462350504789091daa5d2a1ea8be0d62602b016a0109f
[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" "471abe6b87801f46b58462350504789091daa5d2a1ea8be0d62602b016a0109f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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: associated function is never used: `with_capacity`
[INFO] [stderr]   --> src/minmaxheap/minmaxheap.rs:32:12
[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: associated function is never used: `erase`
[INFO] [stderr]    --> src/minmaxheap/minmaxheap.rs:103:12
[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 0.11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/min_max_heap-1bab0a7ad5444a61
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test minmaxheap::minmaxheap_tests::peek_max_test ... ok
[INFO] [stdout] test minmaxheap::minmaxheap_tests::pop_last_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::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 `Command { std: "docker" "inspect" "471abe6b87801f46b58462350504789091daa5d2a1ea8be0d62602b016a0109f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "471abe6b87801f46b58462350504789091daa5d2a1ea8be0d62602b016a0109f", kill_on_drop: false }`
[INFO] [stdout] 471abe6b87801f46b58462350504789091daa5d2a1ea8be0d62602b016a0109f