[INFO] updating cached repository https://github.com/ParkinWu/search_tree
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/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] 1150f31d3a8e45ad85e0cf6389803ddb6d371521
[INFO] testing ParkinWu/search_tree against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FParkinWu%2Fsearch_tree" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ParkinWu/search_tree on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ParkinWu/search_tree
[INFO] finished tweaking git repo https://github.com/ParkinWu/search_tree
[INFO] tweaked toml for git repo https://github.com/ParkinWu/search_tree written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ParkinWu/search_tree already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /big/crater/work/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/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=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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 4bf2ed7d8a40a042855b712d0b0f35ae63e2773ecfd2556e15d3aa53ba7e0949
[INFO] running `"docker" "start" "-a" "4bf2ed7d8a40a042855b712d0b0f35ae63e2773ecfd2556e15d3aa53ba7e0949"`
[INFO] [stderr]    Compiling binary_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Formatter`
[INFO] [stderr]  --> src/main.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::{ Debug, Formatter};
[INFO] [stderr]   |                        ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `take_next`
[INFO] [stderr]   --> src/main.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn take_next(&mut self) -> Option<Box<Self>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_back`
[INFO] [stderr]   --> src/main.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     fn pop_back(&mut self) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_front`
[INFO] [stderr]    --> src/main.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     fn push_front(&mut self, elem: T) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop_front`
[INFO] [stderr]    --> src/main.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn pop_front(&mut self) -> Option<T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]    --> src/main.rs:127:5
[INFO] [stderr]     |
[INFO] [stderr] 127 |     fn iter(&self) -> Iter<T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tail`
[INFO] [stderr]    --> src/main.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 161 |     tail: &'a Raw<T>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `"docker" "inspect" "4bf2ed7d8a40a042855b712d0b0f35ae63e2773ecfd2556e15d3aa53ba7e0949"`
[INFO] running `"docker" "rm" "-f" "4bf2ed7d8a40a042855b712d0b0f35ae63e2773ecfd2556e15d3aa53ba7e0949"`
[INFO] [stdout] 4bf2ed7d8a40a042855b712d0b0f35ae63e2773ecfd2556e15d3aa53ba7e0949
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/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=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" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0d6fc7de28dc4138ed6063ead3f5f9304a9d537fd6935fc24e584685694617fc
[INFO] running `"docker" "start" "-a" "0d6fc7de28dc4138ed6063ead3f5f9304a9d537fd6935fc24e584685694617fc"`
[INFO] [stderr]    Compiling binary_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Formatter`
[INFO] [stderr]  --> src/main.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::{ Debug, Formatter};
[INFO] [stderr]   |                        ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]    --> src/main.rs:127:5
[INFO] [stderr]     |
[INFO] [stderr] 127 |     fn iter(&self) -> Iter<T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tail`
[INFO] [stderr]    --> src/main.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 161 |     tail: &'a Raw<T>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `"docker" "inspect" "0d6fc7de28dc4138ed6063ead3f5f9304a9d537fd6935fc24e584685694617fc"`
[INFO] running `"docker" "rm" "-f" "0d6fc7de28dc4138ed6063ead3f5f9304a9d537fd6935fc24e584685694617fc"`
[INFO] [stdout] 0d6fc7de28dc4138ed6063ead3f5f9304a9d537fd6935fc24e584685694617fc
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/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=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" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] cc9d54bb5c4310264970e98186b64d241be2d6c98e32a8e83662cba1a3ba05b2
[INFO] running `"docker" "start" "-a" "cc9d54bb5c4310264970e98186b64d241be2d6c98e32a8e83662cba1a3ba05b2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/binary_tree-d162133c98cb9077
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test pop_front_test ... ok
[INFO] [stdout] test push_front_back_test ... ok
[INFO] [stdout] test push_front_test ... ok
[INFO] [stdout] test push_pop_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "cc9d54bb5c4310264970e98186b64d241be2d6c98e32a8e83662cba1a3ba05b2"`
[INFO] running `"docker" "rm" "-f" "cc9d54bb5c4310264970e98186b64d241be2d6c98e32a8e83662cba1a3ba05b2"`
[INFO] [stdout] cc9d54bb5c4310264970e98186b64d241be2d6c98e32a8e83662cba1a3ba05b2