[INFO] cloning repository https://github.com/gunhaa/data_structure
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gunhaa/data_structure" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunhaa%2Fdata_structure", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunhaa%2Fdata_structure'...
[INFO] [stderr] fatal: error closing file /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunhaa%2Fdata_structure/packed-refs.new: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/gunhaa/data_structure
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gunhaa/data_structure" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunhaa%2Fdata_structure", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunhaa%2Fdata_structure'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0b97bd602eef6cae8e323153388e0fa235fac43e
[INFO] checking gunhaa/data_structure against master#64b185eddaa1d7ddf5e0c024be23b9cbba6c1722 for pr-143929
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunhaa%2Fdata_structure" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/gunhaa/data_structure
[INFO] finished tweaking git repo https://github.com/gunhaa/data_structure
[INFO] tweaked toml for git repo https://github.com/gunhaa/data_structure written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gunhaa/data_structure on toolchain 64b185eddaa1d7ddf5e0c024be23b9cbba6c1722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/gunhaa/data_structure already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 905d80689551879fe67a24692d6c391041554713142e14c28d0da4e75e31b509
[INFO] running `Command { std: "docker" "start" "-a" "905d80689551879fe67a24692d6c391041554713142e14c28d0da4e75e31b509", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "905d80689551879fe67a24692d6c391041554713142e14c28d0da4e75e31b509", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "905d80689551879fe67a24692d6c391041554713142e14c28d0da4e75e31b509", kill_on_drop: false }`
[INFO] [stdout] 905d80689551879fe67a24692d6c391041554713142e14c28d0da4e75e31b509
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ddf0c0e4035c1981a251c00e3640ec3e8e78a8530bfe5ef62a04e08bf77fe06
[INFO] running `Command { std: "docker" "start" "-a" "1ddf0c0e4035c1981a251c00e3640ec3e8e78a8530bfe5ef62a04e08bf77fe06", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structure v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `SIZE_LIST` is never used
[INFO] [stdout]  --> src/array_list/fail_array_list.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const SIZE_LIST: [usize; 10] = [2,4,8,16,32,64,128,256,512,1024];
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayList` is never constructed
[INFO] [stdout]   --> src/array_list/fail_array_list.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct ArrayList<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ListTrait` is never used
[INFO] [stdout]   --> src/array_list/fail_array_list.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait ListTrait<T> {
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayListVer2` is never constructed
[INFO] [stdout]  --> src/array_list/array_list.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct ArrayListVer2<T> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `append`, `grow`, and `display` are never used
[INFO] [stdout]   --> src/array_list/array_list.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T: Copy> ArrayListVer2<T> {
[INFO] [stdout]    | ------------------------------ associated items in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn append(&mut self, value: T){
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn grow(&mut self){
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn display(&self) -> Vec<Option<&T>>{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SIZE_LIST` is never used
[INFO] [stdout]  --> src/array_list/fail_array_list.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const SIZE_LIST: [usize; 10] = [2,4,8,16,32,64,128,256,512,1024];
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayList` is never constructed
[INFO] [stdout]   --> src/array_list/fail_array_list.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct ArrayList<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ListTrait` is never used
[INFO] [stdout]   --> src/array_list/fail_array_list.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait ListTrait<T> {
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayListVer2` is never constructed
[INFO] [stdout]  --> src/array_list/array_list.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct ArrayListVer2<T> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `append`, `grow`, and `display` are never used
[INFO] [stdout]   --> src/array_list/array_list.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T: Copy> ArrayListVer2<T> {
[INFO] [stdout]    | ------------------------------ associated items in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn append(&mut self, value: T){
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn grow(&mut self){
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn display(&self) -> Vec<Option<&T>>{
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ArrayList`
[INFO] [stdout]  --> src/main.rs:2:46
[INFO] [stdout]   |
[INFO] [stdout] 2 | use array_list::fail_array_list::{ListTrait, ArrayList};
[INFO] [stdout]   |                                              ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ArrayList`
[INFO] [stdout]  --> src/main.rs:2:46
[INFO] [stdout]   |
[INFO] [stdout] 2 | use array_list::fail_array_list::{ListTrait, ArrayList};
[INFO] [stdout]   |                                              ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ListTrait`
[INFO] [stdout]  --> src/main.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use array_list::fail_array_list::{ListTrait, ArrayList};
[INFO] [stdout]   |                                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SIZE_LIST` is never used
[INFO] [stdout]  --> src/array_list/fail_array_list.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const SIZE_LIST: [usize; 10] = [2,4,8,16,32,64,128,256,512,1024];
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayList` is never constructed
[INFO] [stdout]   --> src/array_list/fail_array_list.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct ArrayList<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ListTrait` is never used
[INFO] [stdout]   --> src/array_list/fail_array_list.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait ListTrait<T> {
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ListTrait`
[INFO] [stdout]  --> src/main.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use array_list::fail_array_list::{ListTrait, ArrayList};
[INFO] [stdout]   |                                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SIZE_LIST` is never used
[INFO] [stdout]  --> src/array_list/fail_array_list.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const SIZE_LIST: [usize; 10] = [2,4,8,16,32,64,128,256,512,1024];
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayList` is never constructed
[INFO] [stdout]   --> src/array_list/fail_array_list.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct ArrayList<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ListTrait` is never used
[INFO] [stdout]   --> src/array_list/fail_array_list.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub trait ListTrait<T> {
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "1ddf0c0e4035c1981a251c00e3640ec3e8e78a8530bfe5ef62a04e08bf77fe06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ddf0c0e4035c1981a251c00e3640ec3e8e78a8530bfe5ef62a04e08bf77fe06", kill_on_drop: false }`
[INFO] [stdout] 1ddf0c0e4035c1981a251c00e3640ec3e8e78a8530bfe5ef62a04e08bf77fe06