[INFO] cloning repository https://github.com/brendanburkhart/mols
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brendanburkhart/mols" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendanburkhart%2Fmols", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendanburkhart%2Fmols'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f4ae1e225351c4a82f9deada290684a6b602a239
[INFO] testing brendanburkhart/mols against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrendanburkhart%2Fmols" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brendanburkhart/mols on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/brendanburkhart/mols
[INFO] finished tweaking git repo https://github.com/brendanburkhart/mols
[INFO] tweaked toml for git repo https://github.com/brendanburkhart/mols written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/brendanburkhart/mols already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 157289cb0514099ee661d3985b6626a74dc444e27a84cc8f655096c4e154157b
[INFO] running `Command { std: "docker" "start" "-a" "157289cb0514099ee661d3985b6626a74dc444e27a84cc8f655096c4e154157b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "157289cb0514099ee661d3985b6626a74dc444e27a84cc8f655096c4e154157b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "157289cb0514099ee661d3985b6626a74dc444e27a84cc8f655096c4e154157b", kill_on_drop: false }`
[INFO] [stdout] 157289cb0514099ee661d3985b6626a74dc444e27a84cc8f655096c4e154157b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e02f448a571d2a9bde98751febdcecd7295993ad86191db014d0e24889cf8b6e
[INFO] running `Command { std: "docker" "start" "-a" "e02f448a571d2a9bde98751febdcecd7295993ad86191db014d0e24889cf8b6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling mols v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `column_is_valid`
[INFO] [stdout]   --> src/latin_square.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn column_is_valid(&self, column_index: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_latin`
[INFO] [stdout]   --> src/latin_square.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn is_latin(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `Command { std: "docker" "inspect" "e02f448a571d2a9bde98751febdcecd7295993ad86191db014d0e24889cf8b6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e02f448a571d2a9bde98751febdcecd7295993ad86191db014d0e24889cf8b6e", kill_on_drop: false }`
[INFO] [stdout] e02f448a571d2a9bde98751febdcecd7295993ad86191db014d0e24889cf8b6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2141b1e086d9ea5d9abe2117450431d26d781780332bf3d68c59e0ca19eb1120
[INFO] running `Command { std: "docker" "start" "-a" "2141b1e086d9ea5d9abe2117450431d26d781780332bf3d68c59e0ca19eb1120", kill_on_drop: false }`
[INFO] [stderr]    Compiling mols v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `column_is_valid`
[INFO] [stdout]   --> src/latin_square.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn column_is_valid(&self, column_index: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_latin`
[INFO] [stdout]   --> src/latin_square.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn is_latin(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "2141b1e086d9ea5d9abe2117450431d26d781780332bf3d68c59e0ca19eb1120", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2141b1e086d9ea5d9abe2117450431d26d781780332bf3d68c59e0ca19eb1120", kill_on_drop: false }`
[INFO] [stdout] 2141b1e086d9ea5d9abe2117450431d26d781780332bf3d68c59e0ca19eb1120
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 393959a0f5d1ef85ab7ed888963d4c27df9b223fd3174641d073ae7437ac1707
[INFO] running `Command { std: "docker" "start" "-a" "393959a0f5d1ef85ab7ed888963d4c27df9b223fd3174641d073ae7437ac1707", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `column_is_valid`
[INFO] [stderr]   --> src/latin_square.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn column_is_valid(&self, column_index: usize) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_latin`
[INFO] [stderr]   --> src/latin_square.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn is_latin(&self) -> bool {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `mols` (bin "mols" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mols-c30a9859a476d8a0)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "393959a0f5d1ef85ab7ed888963d4c27df9b223fd3174641d073ae7437ac1707", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "393959a0f5d1ef85ab7ed888963d4c27df9b223fd3174641d073ae7437ac1707", kill_on_drop: false }`
[INFO] [stdout] 393959a0f5d1ef85ab7ed888963d4c27df9b223fd3174641d073ae7437ac1707