[INFO] cloning repository https://github.com/keepri/algo-ds
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/keepri/algo-ds" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeepri%2Falgo-ds", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeepri%2Falgo-ds'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e86369b15d0cf927544ada9b2bf15c7edf4c3086
[INFO] checking keepri/algo-ds against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeepri%2Falgo-ds" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/keepri/algo-ds on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/keepri/algo-ds
[INFO] finished tweaking git repo https://github.com/keepri/algo-ds
[INFO] tweaked toml for git repo https://github.com/keepri/algo-ds written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/keepri/algo-ds 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 461939993bcdd464d57d55bb462f50340625c0f1ed7045413b3d26304e9ddbcd
[INFO] running `Command { std: "docker" "start" "-a" "461939993bcdd464d57d55bb462f50340625c0f1ed7045413b3d26304e9ddbcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "461939993bcdd464d57d55bb462f50340625c0f1ed7045413b3d26304e9ddbcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "461939993bcdd464d57d55bb462f50340625c0f1ed7045413b3d26304e9ddbcd", kill_on_drop: false }`
[INFO] [stdout] 461939993bcdd464d57d55bb462f50340625c0f1ed7045413b3d26304e9ddbcd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6f33b79122199bad4b9f411161e20522d2b4c7591946b957ce5512d1b839929
[INFO] running `Command { std: "docker" "start" "-a" "c6f33b79122199bad4b9f411161e20522d2b4c7591946b957ce5512d1b839929", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]     Checking indenter v0.3.3
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/ds/heap/min_heap.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{default::Default, fmt::Debug};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/ds/queue/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     default::Default,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/ds/stack/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     default::Default,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/ds/heap/min_heap.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{default::Default, fmt::Debug};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/ds/queue/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     default::Default,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/ds/stack/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     default::Default,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/ds/list/mod.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | trait LinkedListTrait<T> {
[INFO] [stdout]    |       --------------- methods in this trait
[INFO] [stdout] 26 |     fn len(&self) -> usize;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 27 |     fn insert_at(&self, item: T, index: usize) -> ();
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 28 |     fn remove(&self, item: T) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 29 |     fn remove_at(&self, index: usize) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 30 |     fn append(&self, item: T) -> ();
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 31 |     fn prepend(&self, item: T) -> ();
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 32 |     fn get(&self, index: usize) -> Option<T>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/ds/list/mod.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | trait LinkedListTrait<T> {
[INFO] [stdout]    |       --------------- methods in this trait
[INFO] [stdout] 26 |     fn len(&self) -> usize;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 27 |     fn insert_at(&self, item: T, index: usize) -> ();
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 28 |     fn remove(&self, item: T) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 29 |     fn remove_at(&self, index: usize) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 30 |     fn append(&self, item: T) -> ();
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 31 |     fn prepend(&self, item: T) -> ();
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 32 |     fn get(&self, index: usize) -> Option<T>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.20s
[INFO] running `Command { std: "docker" "inspect" "c6f33b79122199bad4b9f411161e20522d2b4c7591946b957ce5512d1b839929", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6f33b79122199bad4b9f411161e20522d2b4c7591946b957ce5512d1b839929", kill_on_drop: false }`
[INFO] [stdout] c6f33b79122199bad4b9f411161e20522d2b4c7591946b957ce5512d1b839929