[INFO] cloning repository https://github.com/dante-byte/codingbats-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dante-byte/codingbats-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdante-byte%2Fcodingbats-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdante-byte%2Fcodingbats-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 20663002a286a685391f92dd58fc41b876ed9c25
[INFO] testing dante-byte/codingbats-rust/20663002a286a685391f92dd58fc41b876ed9c25 against try#f23b22458132fb20faeb8a915b1c252478696f25 for pr-131095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdante-byte%2Fcodingbats-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dante-byte/codingbats-rust on toolchain f23b22458132fb20faeb8a915b1c252478696f25
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dante-byte/codingbats-rust
[INFO] finished tweaking git repo https://github.com/dante-byte/codingbats-rust
[INFO] tweaked toml for git repo https://github.com/dante-byte/codingbats-rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/dante-byte/codingbats-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" "+f23b22458132fb20faeb8a915b1c252478696f25" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4a65db8f02503f0dc607dcb93331b344498e2ee07c48bea7d750b19fdca0d52a
[INFO] running `Command { std: "docker" "start" "-a" "4a65db8f02503f0dc607dcb93331b344498e2ee07c48bea7d750b19fdca0d52a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a65db8f02503f0dc607dcb93331b344498e2ee07c48bea7d750b19fdca0d52a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a65db8f02503f0dc607dcb93331b344498e2ee07c48bea7d750b19fdca0d52a", kill_on_drop: false }`
[INFO] [stdout] 4a65db8f02503f0dc607dcb93331b344498e2ee07c48bea7d750b19fdca0d52a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 839a71bb809cd3a6f1f38a0cabacb93a2f60f1543847c0b838092f5a3fb9c8ba
[INFO] running `Command { std: "docker" "start" "-a" "839a71bb809cd3a6f1f38a0cabacb93a2f60f1543847c0b838092f5a3fb9c8ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcoderust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     a + 3;
[INFO] [stdout]    |     ^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let _ = a + 3;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "839a71bb809cd3a6f1f38a0cabacb93a2f60f1543847c0b838092f5a3fb9c8ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "839a71bb809cd3a6f1f38a0cabacb93a2f60f1543847c0b838092f5a3fb9c8ba", kill_on_drop: false }`
[INFO] [stdout] 839a71bb809cd3a6f1f38a0cabacb93a2f60f1543847c0b838092f5a3fb9c8ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4da956e3333bd7ea6b2183c048b31b50ed6e31c07a19a0cdd1185ab91dfbdebc
[INFO] running `Command { std: "docker" "start" "-a" "4da956e3333bd7ea6b2183c048b31b50ed6e31c07a19a0cdd1185ab91dfbdebc", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcoderust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     a + 3;
[INFO] [stdout]    |     ^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let _ = a + 3;
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "4da956e3333bd7ea6b2183c048b31b50ed6e31c07a19a0cdd1185ab91dfbdebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4da956e3333bd7ea6b2183c048b31b50ed6e31c07a19a0cdd1185ab91dfbdebc", kill_on_drop: false }`
[INFO] [stdout] 4da956e3333bd7ea6b2183c048b31b50ed6e31c07a19a0cdd1185ab91dfbdebc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f23b22458132fb20faeb8a915b1c252478696f25" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 39ba924c22c3ed414582dad52adf9dc9703c3346dd739843b3fd28c7e1142980
[INFO] running `Command { std: "docker" "start" "-a" "39ba924c22c3ed414582dad52adf9dc9703c3346dd739843b3fd28c7e1142980", kill_on_drop: false }`
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     a + 3;
[INFO] [stderr]    |     ^^^^^ the arithmetic operation produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let _ = a + 3;
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `leetcoderust` (bin "leetcoderust" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/leetcoderust-191d3d69f2cb7b56)
[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" "39ba924c22c3ed414582dad52adf9dc9703c3346dd739843b3fd28c7e1142980", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39ba924c22c3ed414582dad52adf9dc9703c3346dd739843b3fd28c7e1142980", kill_on_drop: false }`
[INFO] [stdout] 39ba924c22c3ed414582dad52adf9dc9703c3346dd739843b3fd28c7e1142980