[INFO] cloning repository https://github.com/yahyamohmuedpro99/stack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yahyamohmuedpro99/stack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyahyamohmuedpro99%2Fstack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyahyamohmuedpro99%2Fstack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00756d24856271d2cbf8c83eb2bf483b13d4a1bb
[INFO] checking yahyamohmuedpro99/stack against master#36b21637e93b038453924d3c66821089e71d8baa for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyahyamohmuedpro99%2Fstack" "/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/yahyamohmuedpro99/stack
[INFO] finished tweaking git repo https://github.com/yahyamohmuedpro99/stack
[INFO] tweaked toml for git repo https://github.com/yahyamohmuedpro99/stack written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yahyamohmuedpro99/stack on toolchain 36b21637e93b038453924d3c66821089e71d8baa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yahyamohmuedpro99/stack 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" "+36b21637e93b038453924d3c66821089e71d8baa" "fetch" "--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-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c85f86aa9d06fe1b527f34fdc35d02d5bf71fa6525e06ded3f607beae321cc6
[INFO] running `Command { std: "docker" "start" "-a" "7c85f86aa9d06fe1b527f34fdc35d02d5bf71fa6525e06ded3f607beae321cc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c85f86aa9d06fe1b527f34fdc35d02d5bf71fa6525e06ded3f607beae321cc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c85f86aa9d06fe1b527f34fdc35d02d5bf71fa6525e06ded3f607beae321cc6", kill_on_drop: false }`
[INFO] [stdout] 7c85f86aa9d06fe1b527f34fdc35d02d5bf71fa6525e06ded3f607beae321cc6
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9abf1dfa93d819d48668363531789e73ccc007eb1082aa383b911632e6f94189
[INFO] running `Command { std: "docker" "start" "-a" "9abf1dfa93d819d48668363531789e73ccc007eb1082aa383b911632e6f94189", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking colored v2.1.0
[INFO] [stderr]     Checking stack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `numbers::numbers`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use numbers::numbers;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `numbers::numbers`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use numbers::numbers;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `size` is never used
[INFO] [stdout]   --> src/stack/stack.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 6  | / impl<T> Stack<T> 
[INFO] [stdout] 7  | | where 
[INFO] [stdout] 8  | |     T:Debug,
[INFO] [stdout]    | |____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |       pub fn size(&self) -> usize {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `numbers` is never used
[INFO] [stdout]  --> src/numbers.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn numbers(){
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `size` is never used
[INFO] [stdout]   --> src/stack/stack.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 6  | / impl<T> Stack<T> 
[INFO] [stdout] 7  | | where 
[INFO] [stdout] 8  | |     T:Debug,
[INFO] [stdout]    | |____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |       pub fn size(&self) -> usize {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `numbers` is never used
[INFO] [stdout]  --> src/numbers.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn numbers(){
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "9abf1dfa93d819d48668363531789e73ccc007eb1082aa383b911632e6f94189", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9abf1dfa93d819d48668363531789e73ccc007eb1082aa383b911632e6f94189", kill_on_drop: false }`
[INFO] [stdout] 9abf1dfa93d819d48668363531789e73ccc007eb1082aa383b911632e6f94189