[INFO] cloning repository https://github.com/johngoff18/Collatz-Conjecture-in-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johngoff18/Collatz-Conjecture-in-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohngoff18%2FCollatz-Conjecture-in-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohngoff18%2FCollatz-Conjecture-in-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 800e9d4377381c13dc2b86d0136da0c45ea65010
[INFO] testing johngoff18/Collatz-Conjecture-in-Rust against master#552a959051cebf8f88a8f558399baf733bec9ce0 for pr-136932
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohngoff18%2FCollatz-Conjecture-in-Rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johngoff18/Collatz-Conjecture-in-Rust on toolchain 552a959051cebf8f88a8f558399baf733bec9ce0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/johngoff18/Collatz-Conjecture-in-Rust
[INFO] finished tweaking git repo https://github.com/johngoff18/Collatz-Conjecture-in-Rust
[INFO] tweaked toml for git repo https://github.com/johngoff18/Collatz-Conjecture-in-Rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/johngoff18/Collatz-Conjecture-in-Rust 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" "+552a959051cebf8f88a8f558399baf733bec9ce0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 768898ab206a4f531081003a5bfa5dffbea7c7906a4fac68c41fd41bbf95cc9b
[INFO] running `Command { std: "docker" "start" "-a" "768898ab206a4f531081003a5bfa5dffbea7c7906a4fac68c41fd41bbf95cc9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "768898ab206a4f531081003a5bfa5dffbea7c7906a4fac68c41fd41bbf95cc9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "768898ab206a4f531081003a5bfa5dffbea7c7906a4fac68c41fd41bbf95cc9b", kill_on_drop: false }`
[INFO] [stdout] 768898ab206a4f531081003a5bfa5dffbea7c7906a4fac68c41fd41bbf95cc9b
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a08e68a52e018665bf220c6c9ca6c70ce0f2b1b165a2017c73510c82ebe4e98b
[INFO] running `Command { std: "docker" "start" "-a" "a08e68a52e018665bf220c6c9ca6c70ce0f2b1b165a2017c73510c82ebe4e98b", kill_on_drop: false }`
[INFO] [stderr]    Compiling three_n_one v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut count = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_count` is never used
[INFO] [stdout]   --> src/main.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn print_count(count: u128) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "a08e68a52e018665bf220c6c9ca6c70ce0f2b1b165a2017c73510c82ebe4e98b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a08e68a52e018665bf220c6c9ca6c70ce0f2b1b165a2017c73510c82ebe4e98b", kill_on_drop: false }`
[INFO] [stdout] a08e68a52e018665bf220c6c9ca6c70ce0f2b1b165a2017c73510c82ebe4e98b
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b82972a2ac818f165959c3a0db06fcef1e58d398c82d059385537f7ffe354a6
[INFO] running `Command { std: "docker" "start" "-a" "0b82972a2ac818f165959c3a0db06fcef1e58d398c82d059385537f7ffe354a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling three_n_one v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut count = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_count` is never used
[INFO] [stdout]   --> src/main.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn print_count(count: u128) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "0b82972a2ac818f165959c3a0db06fcef1e58d398c82d059385537f7ffe354a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b82972a2ac818f165959c3a0db06fcef1e58d398c82d059385537f7ffe354a6", kill_on_drop: false }`
[INFO] [stdout] 0b82972a2ac818f165959c3a0db06fcef1e58d398c82d059385537f7ffe354a6
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+552a959051cebf8f88a8f558399baf733bec9ce0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] Error response from daemon: mkdir /var/lib/docker/overlay2/1f415d67865167355faa1217bf25ac3ba5aad0e3185cc24b29d864c3dbc0a00e-init: no space left on device